Last Updated： Aggregation Period:Feb 18, 2026～Mar 17, 2026
This ranking is based on the number of page views on our site.
Last Updated： Aggregation Period:Feb 18, 2026～Mar 17, 2026
This ranking is based on the number of page views on our site.
Last Updated： Aggregation Period:Feb 18, 2026～Mar 17, 2026
This ranking is based on the number of page views on our site.
1～30 item / All 75 items
Power supply SPD conforming to JIS standard dimensions for circuit breakers (3-pole and 2-pole).
This is a power supply SPD (surge protective device) that protects AC100V & 200V/400V power circuits from lightning surges, conforming to the dimensions of JIS standard circuit breakers for wiring (for 3-pole and 2-pole use).
SPD for JIS Class 2 power supply evolved with a new mechanism.
The "SmartSPD for Power / SPD for Power" lineup focuses on surge protective devices (SPDs) for power circuits that comply with JIS standards for direct lightning surges of 10/350μs and induced lightning surges of 8/20μs. The products are available in various types according to circuit configurations, and there are also component types. SmartSPD features high functionality that displays the recommended replacement timing based on lightning surge measurement values. 【Features】 ■ Degradation display ■ Improved separation performance ■ Compliant with JIS Class 2 ■ Plug/jack contact ■ DIN rail (35mm width) mounting structure *For more details, please refer to the catalog. Feel free to contact us with any inquiries.
Newly implemented smart feature. Multi-core unit type SPD that protects equipment from lightning.
"HOWL2" is a multi-core unit type SPD equipped with a new function to protect equipment from lightning. It features an innovative status display that clearly shows the SPD's status using LEDs. It also includes a recommended replacement indication function before failure, which triggers a signal from the alarm terminal when replacement is recommended. The visualization of lightning surges has been realized, displaying the number of operations of the unit on a 7-segment display during lightning surge intrusion. 【Features】 ■ Innovative status representation ■ Realization of lightning surge visualization ■ Satisfaction of multi-core insertion ■ Additional features considering insulation testing *For more details, please refer to the catalog. Feel free to contact us with any inquiries.
Space-saving installation possible! SPD that protects equipment from lightning surges invading communication and signal circuits.
The "ZP type" is a slim communication SPD (surge protective device) that protects equipment from lightning surges entering communication and signal circuits. It complies with JIS C 5381-21 Category C2 and D1. It features a plug-in design that excels in maintainability, with a structure that does not cause circuit interruption during plug removal. It also includes a degradation display function (using the dedicated tester "ZPT1 type" sold separately). 【Features】 ■ Slim design allows for space-saving installation ■ DIN rail (35mm) mounting structure ■ Complies with the Ministry of Land, Infrastructure, Transport and Tourism's standard specifications for public building construction ■ Complies with the Ministry of Land, Infrastructure, Transport and Tourism's building equipment design standards ■ Compliant with RoHS directives For more details, please refer to the catalog or feel free to contact us.
Space-saving type suitable for built-in devices! SPD that protects the AC power circuit from lightning surges.
The "PMZ type" is a power supply SPD (surge protective device) suitable for incorporation into devices such as PCS (power conditioners) used in solar power generation, as well as within lighting panels. In the event of degradation failure, it prevents abnormal heating through an internal disconnection mechanism. It is equipped with a highly visible LED for degradation failure indication. 【Features】 - Space-saving design suitable for incorporation into devices - Can simultaneously protect between lines and to ground with a single unit - Complies with JIS C 5381-1 Class II - Conforms to the Ministry of Land, Infrastructure, Transport and Tourism's Building Equipment Design Standards and the Ministry of Land, Infrastructure, Transport and Tourism's Standard Specifications for Public Building Construction - Compliant with RoHS Directive For more details, please refer to the catalog or feel free to contact us.
Protect communication devices from abnormal voltage! Communication Smart SPD with recommended replacement indication function.
The "SMB-KRAPS1 type" is a communication SPD used to protect equipment from abnormal voltage and current induced by communication lines when mounted on the Tyco Electronics' Krone LSA-PLUS separation module. Additionally, it monitors degradation caused by repeated lightning surges and has a function to display a recommended replacement level before the SPD's protective performance is lost, as well as a function to notify when the SPD has degraded. 【Features】 ■ Communication SPD for Krone LSA-PLUS terminals ■ Compliant with JIS C 5381-21 / IEC 61643-21 Category C2, D1 ■ Displays recommended replacement level and surge operation count (LED) ■ Equipped with degradation indication function ■ Compliant with RoHS directive For more details, please refer to the catalog or feel free to contact us.
Signal line type (SL-GVJ series), telephone line type (SL-TJ series), slim type
Ministry of Land, Infrastructure, Transport and Tourism Public Building Construction Standard Specifications Compatible Products (SL-GV12J, SL-GV24J, SL-GV48J, SL-T170J) Ministry of Land, Infrastructure, Transport and Tourism Building Equipment Design Standards Compatible Products (SL-T170J) Compliant with JIS C 5381-21 Protects against lightning surges entering through signal lines. Signal line use (SL-GVJ series), telephone line use (SL-TJ series) SPD, lightning arresters (such as arresters, surge protectors), lightning countermeasure products, lightning surge countermeasure products, induced lightning countermeasures, manufactured by Otowa Electric Industry, a specialist in lightning protection.
The same external dimensions as JIS standard circuit breakers, protecting between phases and between phase and ground with a single unit.
Protects between lines and to ground with one unit. Registered product with the Ministry of Land, Infrastructure, Transport and Tourism (MLIT) Compliant with MLIT's Standard Specifications for Public Building Construction Compliant with MLIT's Design Standards for Building Equipment Class 2 (JIS C 5381-11) compliant Protects equipment from lightning surges entering through power supply and grounding (earth). Induced lightning compatible. Protects equipment from lightning surges entering through power supply and grounding (earth). JIS compliant. A standard SPD that can be installed in distribution boards and sub-distribution boards. SPD, lightning arresters (such as arresters and surge protectors), lightning protection products, lightning surge protection products, induced lightning countermeasures, manufactured by Otowa Electric Industry, a specialist in lightning protection.
Ministry of Land, Infrastructure, Transport and Tourism Standard Specifications for Public Building Construction Conforming Products Ministry of Land, Infrastructure, Transport and Tourism Building Equipment Design Standards Conforming Products JIS C 5381-21 Compliant
For terrestrial digital television broadcasting, BS broadcasting, and CS broadcasting Protects equipment from lightning surges entering through coaxial cables. JIS compliant. Manufactured by Otowa Electric Industry, a specialist in lightning protection products, including SPD, lightning arresters (such as arresters and surge protectors), lightning countermeasure products, and induced lightning countermeasures.
For 2-wire use, for 3-wire use, for RS485 line use, for RS422 line use.
Ministry of Land, Infrastructure, Transport and Tourism Standard Specifications for Public Building Construction Compliant Products (SLT-GV5JW, SLT-GV12JW, SLT-GV24JW) Ministry of Land, Infrastructure, Transport and Tourism Building Equipment Design Standards Compliant Products (SLT-GV24JW) Corresponding to JIS C 5381-21 SPD, lightning arresters (such as arresters, surge protectors), lightning protection products, lightning surge protection products, induced lightning protection, products from Otowa Electric Industry, a specialized manufacturer of lightning protection.
Corresponding to JIS C 5381-21
For control power circuits (AC/DC compatible) Protection from lightning surges entering from control power circuits (AC/DC compatible). Slim type. SPD, lightning arresters (such as arresters and surge protectors), lightning protection products, lightning surge countermeasures, induced lightning countermeasures, manufactured by Otowa Electric Industry, a specialist in lightning protection.
Ministry of Land, Infrastructure, Transport and Tourism Standard Specifications for Public Building Construction Compliant Products Ministry of Land, Infrastructure, Transport and Tourism Building Equipment Design Standards Compliant Products JIS C 5381-21 Compliant
For telephone lines (SPU-T170J) For signal lines (SPU-GV24J) Compatible with LSA-Plus Krone terminal installation Protects equipment from lightning surges entering through telephone and signal lines. JIS compliant. Manufactured by Otowa Electric Industry, a specialist in lightning protection products, including SPD, lightning arresters (such as arresters and surge protectors), lightning countermeasures, and induced lightning countermeasures.
For RS485 lines, for RS422 lines, for RS232C lines, for high current signals.
Ministry of Land, Infrastructure, Transport and Tourism Standard Specifications for Public Building Construction Compliant Products (SR-GV24J, SR-GV38JN) Ministry of Land, Infrastructure, Transport and Tourism Building Equipment Design Standards Compliant Products (SR-GV24J, SR-GV38JN) Corresponding to JIS C 5381-21 SPD, lightning arresters (such as arresters and surge protectors), lightning protection products, lightning surge protection products, induced lightning protection, manufactured by Otowa Electric Industry, a specialist in lightning protection.
Ministry of Land, Infrastructure, Transport and Tourism Standard Specifications for Public Building Construction Compliance Products Ministry of Land, Infrastructure, Transport and Tourism Building Equipment Design Standards Compliance Products JIS C 5381-21 Correspondence
For high current signals and contact signals Protects equipment from lightning surges entering through high current signals and contact signals. SPD, lightning arresters (such as arresters and surge protectors), lightning protection products, lightning surge countermeasures, induced lightning countermeasures, manufactured by Otowa Electric Industry, a specialist in lightning protection.
Free shipping. This is the comprehensive catalog featuring all products from OTOWA.
To request the comprehensive catalog, please fill out the inquiry form and indicate "Request for catalog delivery." ◇◆◇◆◇◆◇◆◇◆◇◆◇◆◇◆◇◆◇◆◇ The comprehensive catalog is available for free! Please fill out the inquiry form to request the comprehensive catalog. ◇◆◇◆◇◆◇◆◇◆◇◆◇◆◇◆◇◆◇◆◇ Manufactured by Otowa Electric Industry, a specialized manufacturer of SPD, lightning arresters (such as arresters and surge protectors), lightning protection products, lightning surge protection products, and induced lightning countermeasures.
Great protective ability
Ministry of Land, Infrastructure, Transport and Tourism Public Building Construction Standard Specifications Compliant Products (SG-GV12J, SG-GV24J, SG-GV48J, SG-GV5JW, SGR-GV12J, SG-T150J) Ministry of Land, Infrastructure, Transport and Tourism Building Equipment Design Standards Compliant Products (SG-GV24J, SG-GV48J) JIS C 5381-21 Compliant For signal lines (SG-GVJ series) and telephone lines (SG-TJ series) High protection capability Protects equipment from lightning surges entering through telephone and signal lines. JIS compliant. SPD, lightning arresters (such as arresters, surge protectors), lightning protection products, lightning surge protection products, induced lightning protection, manufactured by Otowa Electric Industry, a specialist in lightning protection.
Standard specifications for public building construction by the Ministry of Land, Infrastructure, Transport and Tourism, suitable product JEC-2374:2015 for the Girei area.
MPGLS-B6D (for outdoor use: heavy salt resistance) MPGLSI-B6 (for indoor use) MPGLSI-B6-S (for indoor installation) Protects equipment from lightning surges entering from high-voltage and extra-high-voltage power distribution lines. Compliant with JEC standards. A lineup is available for areas prone to severe lightning, salt resistance, indoor use, and cubicle use. Lightning arresters (such as arresters, SPD, LA, surge protectors, etc.), lightning countermeasure products, lightning surge countermeasure products, induced lightning countermeasures, manufactured by Otowa Electric Industry, a specialized manufacturer of lightning protection.
For signal lines, telephone lines, and control power circuits, housing 10 circuits in one unit.
Ministry of Land, Infrastructure, Transport and Tourism Standard Specifications for Public Building Construction Compatible Products (Only SU-KZ24J and SU-KZ24JS) Ministry of Land, Infrastructure, Transport and Tourism Building Equipment Design Standards Compatible Products Compliant with JIS C 5381-21 Protects equipment from lightning surges entering through telephone and signal lines. JIS compliant. SPD, lightning arresters (such as arresters and surge protectors), lightning protection products, lightning surge countermeasure products, induced lightning countermeasures, manufactured by Otowa Electric Industry, a specialist in lightning protection.
Ministry of Land, Infrastructure, Transport and Tourism Standard Specifications for Public Building Construction Compliant Products Ministry of Land, Infrastructure, Transport and Tourism Building Equipment Design Standards Compliant Products JIS C 5381-21 Corresponding
For 4K and 8K broadcasting, terrestrial digital television broadcasting, BS broadcasting, and CS broadcasting. Protects equipment from lightning surges that enter through coaxial cables. JIS compliant. Manufactured by Otowa Electric Industry, a specialist in lightning protection products, including SPD, lightning arresters (such as arresters and surge protectors), lightning countermeasures, and lightning surge countermeasures.
Ministry of Land, Infrastructure, Transport and Tourism Aviation Security Radio Facilities Lightning Protection Construction Standards Compliant Products JIS C 5381-21 Compatible
Remote monitoring capable coaxial cable protection. Protects equipment from lightning surges entering through coaxial cables. JIS compliant. Manufactured by Otowa Electric Industry, a specialist in lightning protection products, including SPDs, lightning arresters (such as arresters and surge protectors), and lightning surge countermeasures.
The lightning arrester features a double skirt structure that excels in dirt resistance and has low leakage current, making it suitable for harsh environments such as salt damage areas.
Please specify the LA connector type for the Tohoku region specifications. Ministry of Land, Infrastructure, Transport and Tourism Standard Specifications for Public Building Construction Compliant Product For salt damage, dust, and high humidity areas JEC-2374:2015 *Rated voltage 4.2kV available (GL-B3DG5-T, GL-B3DG5). The insulating pipe structure with a double skirt has excellent dirt resistance characteristics and low leakage current. It is suitable for harsh environments such as salt damage areas. It protects equipment from lightning surges entering from high voltage and extra high voltage distribution lines. JEC compliant. Compatible with 3.3kV and 6.6kV. Lightning arresters (Aresta, SPD, LA, surge protectors, etc.), lightning countermeasure products, lightning surge countermeasure products, induced lightning countermeasures, manufactured by Otowa Electric Industry, a specialist in lightning protection.
Surge protection device for equipment, circuit breaker type lightning arrester.
Lightning-resistant equipment is a product for equipment protection. 【Features】 ○ Circuit breakers and lightning arresters are integrated! ○ Installation work is simplified, improving safety and reliability. ○ It does not take up installation space. ○ It is economical in terms of total cost. ● For other functions and details, please contact us.
FC cutout that helps prevent equipment failure due to lightning damage!
We offer a super compact type of FC cutout with built-in ZnO elements, known as the ZnO element-equipped FC cutout (box type). When a lightning surge enters, the ZnO element suppresses the voltage and eliminates the lightning surge. This helps prevent fuse blowouts and contributes to the prevention of equipment failures due to lightning damage. 【Features】 - More space-saving and economical than using lightning arresters and cutouts separately - No fuse blowouts due to lightning surges - Excellent non-linearity, effectively suppressing lightning surges without continuous current, and performs well under multiple lightning responsibilities - Smaller cross-sectional area with greater discharge capacity compared to SiC elements, enabling miniaturization - High performance and high reliability that exceed JIS standard values *For more details, please download the PDF or feel free to contact us.
Do you know? Thunder can destroy your precious things, and it means you can protect your precious things from thunder.
It protects high-pressure equipment. It can be used for various purposes, such as protecting communication devices when lightning surges flow on the secondary side of a high-pressure transformer.
Monitor fuse status with alarm contacts and display window! Quick response is possible when the varistor deteriorates.
The "Alarm Fuse Unit (FZU)" is a product that is compatible with our P4 type alarm fuse receptacle. In the event of varistor degradation due to excessive surges, the fuse within the FZ unit disconnects the varistor to prevent secondary damage. This unit protects between lines and between each line and ground. 【Features】 ■ It is a plug-in type for our P4 type fuse receptacle, making replacement easy. ■ Monitors the fuse status with alarm contacts and a display window. ■ Allows for prompt response in the event of varistor degradation. *For more details, please refer to the PDF document or feel free to contact us.
The ITV cameras, fire alarms, and internal broadcasting equipment also have a lot of achievements in lightning protection measures!
We would like to introduce examples of lightning damage countermeasures for electrical equipment in factories. In advanced factories, all equipment is highly digitized and interconnected through a network. As a result, damage in one area can often spread throughout the entire network, making it necessary to consider lightning protection measures for the entire factory. Our company focuses on lightning protection measures through on-site surveys, and we have a track record of implementing these measures in factories across various locations. We have received particularly high praise for our countermeasures concerning power equipment, such as servers, inverters, and DC power supplies, which are significantly affected by lightning, as well as instrumentation devices that are essential for plant operations. 【Main Lightning Protection Products (Partial)】 ■ Surge Protectors for Power Supply ・VAJ Series ・VNJ Series ■ Surge Protectors for Communication and Signal ・VTJ Series ・VCJ Series *For more details, please download the PDF or feel free to contact us.
We are taking measures for equipment that may be affected by lightning surges!
We would like to introduce examples of lightning damage countermeasures for electrical equipment at dams. Dams are located in mountainous areas with a high frequency of lightning strikes, and due to the distance between the monitoring station and the equipment within the dam body, an environment conducive to potential differences is created. Lightning strikes in the vicinity have caused damage to dam management equipment, and if the dam management system stops, it could lead to the worst-case scenario, making reliable lightning protection measures necessary. Our company has installed the VAJ series at the main power panel of the electrical room to protect the monitoring station's equipment from direct lightning surges, and we have provided grounding SPDs to equalize potential between grounding electrodes. [Case Overview] - Proposals for lightning protection measures suitable for the local situation and design of lightning protection panels - Implementation of countermeasures for equipment at risk of lightning surges, including meteorological observation devices, discharge warning systems, CCTV cameras, telephone lines, leakage flow meters, water level gauges, seismometers, audit corridor lighting, and signal lines between the monitoring station and each gate. *For more details, please download the PDF or feel free to contact us.
