利久電器 List of Products and Services

Our company has core technologies such as high-precision and highly reliable spot welding, the use of electronic ceramics for capacitors, thermistors, piezoelectric elements, and the encapsulation of composite parts in safe, non-flammable silicone-based cement. Additionally, we respond to needs with major products like fixed resistors, resistor networks, hybrid ICs, and various substrate assemblies in small lots and short delivery times. Please make use of Rikyudenki's core technologies. 【Core Technologies】 ■ Coating - Carbon vacuum deposition - Metal film plating - Metal oxide deposition - Thick film application and curing ■ Element Assembly - Press fitting - Welding *For more details, please refer to the PDF materials or feel free to contact us.

Small winding resistors are one of the main products of Rikyu Electric. We provide an illustrated introduction to the most important process of winding fixation for winding resistors. If you are looking for alternatives due to the discontinuation of existing model numbers, or if you are interested in the winding process beyond just resistors, please take a moment to read our materials. We also undertake partial processes, not just finished product sales. If you are interested, please do not hesitate to contact us. Flow after downloading the materials: 1. In addition to the automatic reply email, we will send an email from the Ipros site. 2. If you have specific interests, please reply with details about the items you are considering for use and any current issues you are facing. *We will only proceed to the next steps if we receive contact from you. 3. We will respond to your inquiries and discuss future meetings. 4. We will visit your company for meetings (web meetings are also possible. For custom products, we would prefer to meet in person if possible).

This document is a reference compatibility guide for resistors to support the substitution of resistors. It is important to hedge risks in case of discontinuation of existing products or supply interruptions due to various reasons. When the supply sources are concentrated in specific countries or factories, there is a possibility of significant delays in delivery if an "unexpected" situation occurs. This document includes carbon film fixed resistors, wire-wound fixed resistors, and cement case film fixed resistors, among others. While it does not guarantee individual characteristics as equivalent products, it can be useful for considering compatibility based on basic specifications and sizes. Our company possesses core technologies such as high-precision and reliable spot welding, as well as the encapsulation of composite components using non-flammable silicone-based cement. We have a track record of adoption in various fields, including consumer electronics, industrial equipment, and gaming machines, but please inquire about individual characteristics. [Contents (partial)] ■ Background ■ Resistor Reference Compatibility Table ■ Carbon Film Fixed Resistor 0Ω Series "RD Type" ■ Non-Flammable Carbon Film Fixed Resistor "FRD Type" ■ Non-Flammable Coating Film Fixed Resistor "RG/RX Type" *For more details, please refer to the PDF document or feel free to contact us.

This document is a reference compatibility material for resistors that supports the substitution of resistors. It includes the carbon film fixed resistor 0Ω series "RD type," as well as wire-wound fixed resistors "RW type" and cement case film fixed resistors "RGC/RGT," among others. While it does not guarantee individual characteristics as equivalent products, it can be useful for considering compatibility based on basic specifications and sizes. Our company possesses core technologies such as high-precision spot welding with high bonding reliability and the encapsulation of composite components using non-flammable silicone-based cement, which ensures high safety. We have a track record of adoption in various fields, including consumer devices, industrial equipment, and gaming machines, but please contact us for individual characteristics. [Contents (partial)] ■ Background ■ Resistor Reference Compatibility Table ■ Carbon Film Fixed Resistor 0Ω Series "RD Type" ■ Non-Flammable Carbon Film Fixed Resistor "FRD Type" ■ Non-Flammable Coated Film Fixed Resistor "RG/RX Type" *For more details, please refer to the PDF document or feel free to contact us.

At Riku Electric Co., Ltd., we offer "customization of resistors." Due to the configuration of the equipment or the layout of the circuit board, standard catalog products may not meet your specifications, sizes, or shapes. We will align your requirements and provide feasible proposals. We solve issues where customization is necessary because the sizes and shapes of catalog items do not match the design specifications. We eliminate the hassle of post-processing that you may be doing on your end. 【Product Examples】 We customize terminal shapes, sizes, specifications, etc., for various general-purpose resistors. Whether you want to change the shape of the mounting terminals, extend the length of the lead wires, modify the case size, or require a special combination of power and resistance values, we will provide feasible proposals. ■ Carbon film fixed resistors ■ Metal film fixed resistors ■ Metal glaze film fixed resistors ■ Flame-retardant coated fixed resistors ■ Wire-wound fixed resistors ■ Cement case fixed resistors *For more details, please download the PDF or feel free to contact us.

Rated power 0.5~2W, main body size 3.2~24mm, tolerance D, F, G, J, resistance value range 100KΩ~1MΩ 【Features】 ■ Ultra-small and high-power product ■ Uses flame-retardant paint, improving fire resistance ■ Better dielectric strength characteristics than standard products ■ Exterior color: violet ■ Marking: color code * For more details, please refer to the PDF document or feel free to contact us. Flow after downloading the materials: 1. In addition to the automatic reply email, we will send an email from the Ipros site. 2. If you are specifically interested, please reply with the items you are considering for use and any current issues you are facing. *We will proceed to the next steps only if we receive contact from you. 3. We will respond to your inquiries and discuss future meetings. 4. Meeting at your company (Web meetings are also possible. For custom products, we would prefer to meet in person if possible.)

Rated power 0.25~3W, body size 3.2~15mm, tolerance F, G, J, resistance value range 0.1Ω~1MΩ 【Features】 ■ High reliability corresponding to the upper resistance value of acid metal resistors ■ Exterior color: Green ■ Marking: Color code * Replacement for 'SPR/SPRX', equivalent product * For more details, please refer to the PDF document or feel free to contact us. Flow after downloading the document: 1. In addition to the automated reply email, we will send an email from the Ipros site. 2. If you are specifically interested, please reply with the items you are considering for use and any current issues you are facing. *We will proceed to the next steps only if we receive contact from you. 3. We will respond to your inquiries and discuss future meetings. 4. Meeting at your company (Web meetings are also possible. For custom products, we would prefer to meet in person if possible.)

Rated power 0.25~3W, body size 3.3~24.00mm, tolerance G, J, resistance values can accommodate non-standard series. 【Features】 ○ General-purpose small-sized products, standard products ○ Ensures uniform quality in a compact size ○ High dimensional accuracy, ideal for automatic insertion ○ Can also accommodate pulse-resistant types 〇 Seven series available by standard * Customization of resistance values, lead wire diameter, and shape is possible. * If you are having trouble with a discontinued model, we can provide alternative products. Flow after downloading the materials: 1. In addition to the automatic reply email, we will send an email from the Ipros site. 2. If you have specific interests, please reply with details about the items you are considering for use and any current issues you are facing. *We will proceed to the next steps only if we receive contact from you. 3. We will respond to your inquiries and discuss future meetings. 4. Meeting at your company (Web meetings are also possible. For custom products, we would prefer to meet in person if possible.)

Rated power 1~20W, body size 13.5~63.0mm, allowable tolerance J, K, resistance values also compatible with non-standard series. 【Features】 〇 Composed entirely of non-combustible materials 〇 Excellent safety 〇 Superior surge characteristics 〇 Suitable for power circuits 〇 Six series available by standard ※ Alternatives and equivalents for 'BWR' and 'ERF' ※ For more details, please contact us or download the information. Flow after downloading the materials: 1. In addition to the automatic reply email, we will send an email from the Ipros site. 2. If you are specifically interested, please reply with the items you are considering for use and any current issues you are facing. ※ We will proceed to the next steps only if we receive contact from you. 3. We will respond to your inquiries and discuss future meetings. 4. Meeting at your company for discussions (Web meetings are also possible. For custom products, we would prefer to meet in person if possible.)

Rated power 1~10W, main body size 13.5~48.0mm, allowable tolerance J, compatible with values other than resistance value series. 【Features】 〇 Composed entirely of non-combustible materials 〇 Excellent safety 〇 Superior surge characteristics structure 〇 Suitable for power circuits 〇 Six series available by standard * Alternatives and equivalents to 'BSR' and 'ERGC' * For more details, please contact us or download the catalog. Flow after downloading the materials: 1. In addition to the automatic reply email, we will send an email from the Ipros site. 2. If you are specifically interested, please reply with the items you are considering for use and any current issues you are facing. *We will proceed to the next steps only if we receive contact from you. 3. We will respond to your inquiries and discuss future meetings. 4. Meeting at your company for discussions (web meetings are also possible. For custom products, we would prefer to meet in person if possible).

Rated power: 0.25~3W, Body size: 3.3~11.0mm, Tolerance: F, J, Resistance values also compatible with non-standard series. 【Features】 〇 Uses a substrate with high thermal conductivity 〇 A precision resistor with excellent heat and humidity resistance 〇 Eight series available by standard ※ 'RK' alternatives and equivalents ※ For more details, please contact us or download the catalog. Flow after downloading the materials: 1. In addition to the automatic reply email, we will send an email from the Ipros site. 2. If you have specific interests, please reply with the items you are considering for use and any current issues you are facing. ※ We will proceed to the next steps only if we receive contact from you. 3. We will respond to your inquiries and discuss future meetings. 4. Meeting at your company for discussions (Web meetings are also possible. For custom products, we would prefer to meet in person if possible.)

Rated power 0.25~1W, body size 3.3~11.0mm, tolerance D, F, G, resistance values also available outside standard series 【Features】 〇 Uses a substrate with high thermal conductivity 〇 Excellent heat and humidity resistance precision resistors 〇 Non-combustible paint exterior type also available 〇 Five series available by standard ※ Alternatives and equivalents to 'MF' and 'ERO' ※ For more details, please contact us or download the catalog Flow after downloading the materials 1. In addition to the automatic reply email, we will send an email from the Ipros site. 2. If you are specifically interested, please reply with the items you are considering for use and any current issues you are facing. ※ We will proceed to the next steps only if we receive contact from you. 3. We will respond to your inquiries and discuss future meetings. 4. Meeting at your company (Web meetings are also possible. For custom products, we would prefer to meet in person if possible.)

Rated power 0.5~7W, body size 6.3~24.0mm, tolerance G, J, resistance values available beyond standard series. 【Features】 〇 Utilizes high thermal conductivity ceramic substrate and highly reliable metal 〇 Quality is stable 〇 Exterior uses non-combustible paint 〇 Excellent safety 〇 Miniaturized version of the RG(X)-AN series * Alternatives and equivalents to 'MOS(X)' and 'ERG(X)' * For more details, please contact us or download the catalog. Flow after downloading the materials: 1. In addition to the automatic reply email, we will send an email from the Ipros site. 2. If you have specific interests, please reply with the items you are considering for use and any current issues you are facing. *We will proceed to the next steps only if we receive contact from you. 3. We will respond to your inquiries and discuss future meetings. 4. Meeting at your company (Web meetings are also possible. For custom products, we would prefer to meet in person if possible.)

Rated power: 0.5, 1W Body size: 21, 31mm Tolerance: J, K, M, N Resistance value 1~500MΩ 【Features】 ■ High resistance products for high voltage circuits ■ Thin SIP shape ■ Two types available based on rated power * Replacement for 'RK92', equivalent product * For more details, please refer to the PDF document or feel free to contact us. Flow after downloading the materials: 1. In addition to the automatic reply email, we will send an email from the Ipros site. 2. If you have specific interests, please reply with the items you are considering for use and any current issues you are facing. *We will proceed to the next steps only if we receive contact from you. 3. We will respond to your inquiries and discuss future meetings. 4. Meeting at your company (Web meetings are also possible. For custom products, we would prefer to meet in person if possible.)

Rated power: 63,125mW Body size: 1.0~10.16mm Resistance value tolerance: F, J Resistance value: 10Ω~1MΩ 【Features】 ■ Easy solder fillet inspection with convex electrode shape ■ Reduced mounting costs due to decreased component mounting frequency ■ Series of independent circuits and various common circuits ■ Custom circuits also available * Alternatives and equivalents to 'RKC' and 'EXB' * For more details, please refer to the PDF document or feel free to contact us. Flow after downloading the document: 1. In addition to the automatic reply email, we will send an email from the Ipros site. 2. If you have specific interests, please reply with the items you are considering for use and any current issues you are facing. *We will proceed to the next steps only if we receive contact from you. 3. We will respond to your inquiries and discuss future meetings. 4. Meeting at your company (Web meetings are also possible. For custom products, we would prefer to meet in person if possible.)

Rated power: 125~500mW Body size: 10.1~35.5mm Resistance value tolerance: F, G, J Resistance value range: 22Ω~1MΩ 【Features】 ■ Low-profile products (8S series) and high-power products (4B series) are available for selection ■ Low-profile products (8S, 4-pin to 9-pin) are compatible with automatic insertion taping ■ A wide range of standard circuits ■ Custom circuits are also available *Alternatives to 'RKL', equivalent products *For more details, please refer to the PDF document or feel free to contact us. Flow after downloading the materials 1. In addition to the automatic reply email, we will send an email from the Ipros site. 2. If you are specifically interested, please reply with the items you are considering for use and any current issues you are facing. *We will proceed to the next steps only if we receive contact from you. 3. We will respond to your inquiries and discuss future meetings. 4. Meeting at your company (Web meetings are also possible. For custom products, we would prefer to meet in person if possible.)

Rated power: 50mW~1W Body size: 1.0~6.4mm Tolerance: F, J, K, M Resistance value range: 0.051Ω~1GΩ 【Features】 ■ Compact, lightweight, and thin ■ High reliability product with no solder creep due to three-layer electrode structure ■ "RCL and RCH types" for low and high resistance ■ "RCS and RCC types" for sulfur resistance and surge resistance * For more details, please refer to the PDF document or feel free to contact us. Flow after downloading the document: 1. In addition to the automated reply email, we will send an email from the Ipros site. 2. If you have specific interests, please reply with the items you are considering for use and any current issues you are facing. *We will proceed to the next steps only if we receive contact from you. 3. We will respond to your inquiries and discuss future meetings. 4. Meeting at your company for discussions (Web meetings are also possible. For custom products, we would prefer to meet in person if possible.)

Rated power: 0.5~3W Body size: 3.1~10mm Resistance value tolerance: D, F, J Resistance value range: 0.05Ω~2.2MΩ 【Features】 ■ High reliability with no solder wicking due to the three-layer structure of the electrodes ■ Compact and thin design ■ Available in high power type (RCP type) and low resistance for high power current detection (RL type) ■ Long electrode type improves heat dissipation * Substitute for 'WK', equivalent product * For more details, please refer to the PDF document or feel free to contact us. Flow after downloading the document: 1. In addition to the automatic reply email, we will send an email from the Ipros site. 2. If you are specifically interested, please reply with the items you are considering for use and any current issues you are facing. *We will proceed to the next steps only if we receive contact from you. 3. We will respond to your inquiry and discuss future meetings. 4. Meeting at your company (Web meetings are also possible. For custom products, we would prefer to meet in person if possible.)

Rated power: 0.1~2W Body size: 5~25mm Resistance value tolerance: T, Q, A, B, C, D, F 【Features】 ■ High-density mounting possible due to insulated rectangular shape ■ Low temperature coefficient and current noise, excellent frequency characteristics ■ High reliability precision resistors with minimal aging changes * Alternative to 'MRS', equivalent products * For more details, please refer to the PDF materials or feel free to contact us. Flow after downloading the materials: 1. In addition to the automatic reply email, we will send an email from the Ipros site. 2. If you have specific interests, please reply with the items you are considering for use and any current issues you are facing. *We will proceed to the next steps only if we receive contact from you. 3. We will respond to your inquiries and discuss future meetings. 4. Meeting at your company (Web meetings are also possible. For custom products, we would prefer to meet in person if possible.)

Rated power: 62.5mw~1W Main body size: 1.6~11.5mm Tolerance: Q, A, B, C, D, F Resistance value range: 5.1Ω~5MΩ 【Features】 ■ Minimal aging change and excellent stability ■ Outstanding temperature coefficient (±1 to 25ppm/°C) ■ Ultra-precision grade [tolerance ±0.02% (Q)] compatible * Replacement for 'RN73' and 'ERA', equivalent products * For more details, please refer to the PDF document or feel free to contact us. Flow after downloading the materials: 1. In addition to the automatic reply email, we will send an email from the Ipros site. 2. If you are specifically interested, please reply with the items you are considering for use and any current issues you are facing. *We will proceed to the next steps only if we receive contact from you. 3. We will respond to your inquiries and discuss future meetings. 4. Meeting at your company (Web meetings are also possible. For custom products, we would prefer to meet in person if possible.)

Rated power 0.25~5W, body size 6.5~69.0mm, tolerance B, C, D, F, G, J, resistance values available beyond standard series. 【Features】 〇 Uses a substrate with high thermal conductivity 〇 Excellent heat and humidity resistance high-megohm resistors 〇 Available in light blue exterior color 〇 Seven series available by specification * Alternatives and equivalents for 'RK' and 'GS' * For more details, please contact us or download the catalog. Flow after downloading the materials: 1. In addition to the automatic reply email, we will send an email from the Ipros site. 2. If you have specific interests, please reply with the items you are considering for use and any current issues you are facing. *We will proceed to the next steps only if we receive contact from you. 3. We will respond to your inquiries and discuss future meetings. 4. Meeting at your company for discussions (web meetings are also possible. For custom products, we would prefer to meet in person if possible.)

Rated power 2W (RP-2), 5W (RP-5) Body size 8.5mm (RP-2), 18.0mm (RP-5) Tolerance J, K Resistance values also available outside of standard series 【Features】 〇 Current detection resistors of power type 〇 Composed entirely of non-combustible materials, ensuring excellent safety 〇 Small footprint 〇 Two series available by specification ※ Replacement for 'BPR', equivalent products ※ For more details, please contact us or download the catalog Flow after downloading the materials 1. In addition to the automatic reply email, we will send an email from the Ipros site. 2. If you are specifically interested, please reply with the items you are considering for use and any current issues you are facing. ※ We will proceed to the next steps only if we receive contact from you. 3. We will respond to your inquiries and discuss future meetings. 4. Meeting at your company (Web meetings are also possible. For custom products, we would prefer to meet in person if possible.)

Rated power 0.25~2W, body size 6.3~14.0mm, tolerance J, resistance values available beyond standard series. 【Features】 〇 Resistor with fuse function 〇 Precision resistor made from high thermal conductivity substrate, excellent heat resistance and stability 〇 Exterior coated with non-flammable paint for superior safety 〇 Four series available by specification ※ Alternatives and equivalents to 'RF' and 'ERQ' ※ For more details, please contact us or download the catalog. Flow after downloading the materials: 1. In addition to the automated reply email, we will send an email from the Ipros site. 2. If you have specific interests, please reply with the items you are considering for use and any current issues you are facing. ※ We will proceed to the next steps only if we receive contact from you. 3. We will respond to your inquiries and discuss future meetings. 4. Meeting at your company (Web meetings are also possible. For custom products, we would prefer to meet in person if possible.)

Rated power 1~10W, body size 9.0~40.0mm, tolerance G, J, K, resistance values also available outside standard series. 【Features】 〇 Composed entirely of non-combustible materials, ensuring excellent safety. 〇 Excellent surge characteristics, suitable for power circuits. 〇 10 series available by specification. Alternatives for 'CW' and 'ERW'. * For more details, please contact us or download the catalog. Flow after downloading the materials: 1. In addition to the automatic reply email, we will send an email from the Ipros site. 2. If you have specific interests, please reply with the items you are considering using and any current issues you are facing. * We will proceed to the next steps only if we receive contact from you. 3. We will respond to your inquiries and discuss future meetings. 4. Meeting at your company for discussions (web meetings are also possible. For custom products, we would prefer to meet in person if possible).

Rated power: Equivalent to 0.25~0.5W Body size: 3.3~8.0mm 【Features】 ■ Same shape and dimensions as carbon film resistors RD-S2, RD-S1, and RD-25 ■ High dimensional accuracy, suitable for automatic insertion ■ Exterior is light orange ■ We also handle "jumper wires" with taping and processing types. *For more details, please refer to the PDF document or feel free to contact us. Flow after downloading the document: 1. In addition to the automatic reply email, we will send an email from the Ipros site. 2. If you have specific interests, please reply with the items you are considering for use and any current issues you are facing. *We will proceed to the next steps only if we receive contact from you. 3. We will respond to your inquiries and discuss future meetings. 4. Meeting at your company (Web meetings are also possible. For custom products, we would prefer to meet in person if possible.)

Rated power 0.25~2W, body size 3.2~15mm, tolerance F, G, J, resistance value range 100KΩ~100MΩ 【Features】 ■ Resistors with excellent surge characteristics ■ Exterior color: Violet ■ Marking: Color code Replacement for 'RCR', equivalent products *For more details, please refer to the PDF document or feel free to contact us. Flow after downloading the materials: 1. In addition to the automatic reply email, we will send an email from the Ipros site. 2. If you are specifically interested, please reply with the items you are considering for use and any current issues you are facing. *We will proceed to the next steps only if we receive contact from you. 3. We will respond to your inquiries and discuss future meetings. 4. Meeting at your company (Web meetings are also possible. For custom products, we would prefer to meet in person if possible.)

Rated power 0.5~1W, body size 9.0~15mm, tolerance J, resistance value range 100KΩ~12MΩ 【Features】 ■ Resistors with excellent surge characteristics ■ Exterior color: Violet ■ Marking: Color code * Substitute for 'RK1/2G', equivalent product * For more details, please refer to the PDF document or feel free to contact us. Flow after downloading the document: 1. In addition to the automatic reply email, we will send an email from the Ipros site. 2. If you have specific interests, please reply with the items you are considering for use and any current issues you are facing. *We will proceed to the next steps only if we receive contact from you. 3. We will respond to your inquiries and discuss future meetings. 4. Meeting at your company (Web meetings are also possible. For custom products, we would prefer to meet in person if possible.)

Rated power 0.1~0.25W, body size 1.0~3.2mm, tolerance D, F, G, J, resistance range 1Ω~10MΩ 【Features】 ■ Thick film chip resistors ■ Non-magnetic type ■ Noise reduction ■ Suitable for audio equipment such as audio devices * For more details, please refer to the PDF document or feel free to contact us. Flow after downloading the materials: 1. In addition to the automatic reply email, we will send an email from the Ipros site. 2. If you have specific interests, please reply with the items you are considering for use and any current issues you are facing. *We will proceed to the next steps only if we receive contact from you. 3. We will respond to your inquiries and discuss future meetings. 4. Meeting at your company (Web meetings are also possible. For custom products, we would prefer to meet in person if possible.)

In this document, we introduce manufacturing equipment that enables us to meet various needs, compatibility charts with other companies' model numbers, and custom case studies. We provide an overview of RIKYU Electric's core technologies, including "winding," "acid gold plating," and "cutting," as well as compatibility charts with other companies, discontinued product alternatives, and custom case studies. [Contents] ■ Manufacturing process of resistors and RIKYU Electric's manufacturing equipment - Introduction to some of RIKYU Electric's core technologies (winding process, acid gold plating, cutting) ■ Compatibility chart with other companies ■ Custom case studies ■ Inquiries If you are having trouble with alternatives or custom requests, or if you are considering partial process orders, or if you are interested in our manufacturing equipment, please contact us first. *For more details, please download the PDF or feel free to contact us.

Acid-resistant resistors are one of the main products of Rikyu Electric. We are introducing the process of baking metal oxide films onto white insulators, which is the starting process for manufacturing acid-resistant resistors, along with illustrations. If you are looking for alternatives due to the discontinuation of existing model numbers or are interested in the acid film deposition process beyond just resistors, please take a moment to read this. We also accept contracts for partial processes, not just for finished product sales. If you are interested, please feel free to contact us. Flow after downloading the materials: 1. In addition to the automatic reply email, we will send an email from the Ipros site. 2. If you have specific interests, please reply with details about the items you are considering for use and any current issues you are facing. *We will proceed to the next steps only if we receive contact from you. 3. We will respond to your inquiries and discuss future meetings. 4. We will visit your company for discussions (web meetings are also possible. For custom products, we would prefer to meet in person if possible).

The lead cap functions as the electrode of the resistor by being pressed into the ceramic insulator. We are introducing the welding of lead caps, which is important in the manufacturing of special-sized resistors, along with illustrations. If you are having trouble with existing products due to mismatched cap sizes, or if you are interested in lead caps beyond just resistors, please take a look at our materials. We can flexibly accommodate cap sizes, lead wire diameters, and terminal shapes. If you are interested, please feel free to contact us. Flow after downloading the materials: 1. In addition to the automatic reply email, we will send an email from the Ipros site. 2. If you have specific interests, please reply with details about the items you are considering for use and any current issues you are facing. *We will proceed to the next steps only if we receive contact from you. 3. We will respond to your inquiries and discuss future meetings. 4. We will visit your company for discussions (web meetings are also possible. For custom products, we would prefer to meet in person if possible).