We have compiled a list of manufacturers, distributors, product information, reference prices, and rankings for Protective Device.
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Protective Device Product List and Ranking from 21 Manufacturers, Suppliers and Companies

Last Updated： Aggregation Period:Sep 03, 2025～Sep 30, 2025
This ranking is based on the number of page views on our site.

Protective Device Manufacturer, Suppliers and Company Rankings

Last Updated： Aggregation Period:Sep 03, 2025～Sep 30, 2025
This ranking is based on the number of page views on our site.

  1. HRD CO.,LTD. Osaka Head Office , Osaka Branch , Nagoya Branch , Toyota Branch , Tokyo Branch , Hiroshima Office , Himeji Office , Kyoto Office , Toyama Office , Toyohashi Office , Kyusyu Office , Shizuoka Office , Sendai Office , HRD-THAILAND Co.,LTD. Osaka//Trading company/Wholesale
  2. 山田電機製造 Aichi//others
  3. アローズエンジニアリング Chiba//Testing, Analysis and Measurement
  4. 4 伊藤精密製作所 MSTEC事業部 Gifu//others
  5. 5 日本システム企画 東京本社　 Tokyo//Other manufacturing
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Protective Device Product ranking

Last Updated： Aggregation Period:Sep 03, 2025～Sep 30, 2025
This ranking is based on the number of page views on our site.

  1. WOT type trap <Alternative to T type trap> Vacuum pump protection device HRD CO.,LTD. Osaka Head Office , Osaka Branch , Nagoya Branch , Toyota Branch , Tokyo Branch , Hiroshima Office , Himeji Office , Kyoto Office , Toyama Office , Toyohashi Office , Kyusyu Office , Shizuoka Office , Sendai Office , HRD-THAILAND Co.,LTD.
  2. Overcurrent relay (motor overcurrent protection device) 山田電機製造
  3. High-efficiency cold trap vacuum pump protection device 'HC-J Collector' HRD CO.,LTD. Osaka Head Office , Osaka Branch , Nagoya Branch , Toyota Branch , Tokyo Branch , Hiroshima Office , Himeji Office , Kyoto Office , Toyama Office , Toyohashi Office , Kyusyu Office , Shizuoka Office , Sendai Office , HRD-THAILAND Co.,LTD.
  4. 4 Backup power instant low voltage protection device "Voltage Sag Protector" アローズエンジニアリング
  5. 5 Vacuum Pump Protection Device HN-S Type HRD CO.,LTD. Osaka Head Office , Osaka Branch , Nagoya Branch , Toyota Branch , Tokyo Branch , Hiroshima Office , Himeji Office , Kyoto Office , Toyama Office , Toyohashi Office , Kyusyu Office , Shizuoka Office , Sendai Office , HRD-THAILAND Co.,LTD.

Protective Device Product List

16～30 item / All 53 items

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Vacuum Pump Protection Device HN-S Type

Vacuum Pump Protection Device HN-S Type

This is a compact model developed for small vacuum pumps with a displacement of 5 m³/min or less.

The "HS Collector Series" provided by HRD Corporation is a high-performance, compact capture filter system that captures over 98% of particles. It promotes your company's environmental initiatives in conjunction with dry vacuum pumps and significantly contributes to obtaining ISO 14001 certification. The "HN-S type" is a small model developed for small vacuum pumps with a displacement of 5m³/min or less, with a standard piping diameter of 25A or less. Its internal structure is the same as the HS series and is made entirely of SUS, making it suitable for use in the food industry. (Mounting legs are optional.) For more details, please contact us or refer to the catalog.

  • Vacuum pump
  • filter

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Vacuum Pump Protection Device HN-B Type

Vacuum Pump Protection Device HN-B Type

It is used when a large amount of drainage of 10m3/min or more is discharged.

The "HS Collector Series" provided by H.R.D. Corporation is a high-performance, compact capture filter system that captures over 98% of particles. It promotes your company's environmental initiatives when used in conjunction with a dry vacuum pump and significantly contributes to obtaining ISO 14001 certification. The "HN-B type" is a large displacement type with a horizontal structure that uses three filters, designed for cases where a large amount of drainage of 10m³/min or more is discharged. For more details, please contact us or refer to the catalog.

  • Vacuum pump
  • filter

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Protection device for detecting abnormalities in railway vehicle transformers.

Protection device for detecting abnormalities in railway vehicle transformers.

Abnormalities in the vehicle transformer detected! A wide range of protective devices to prevent accidents before they occur.

Our company offers a variety of protective devices that detect abnormalities in vehicle transformers and prevent accidents before they occur. These devices are designed to withstand forced vibrations and impacts caused by vehicle operation, and they are built to endure flying debris, such as stones, during travel. 【Features】 ■ Temperature relay: Monitors the oil temperature inside the transformer tank ■ Oil flow relay: Detects oil flow and monitors the operating status of the oil pump ■ Oil level detector: Detects a decrease in the internal oil level ■ Pressure relief valve: Captures pressure increases inside the transformer and releases pressure instantly *For more details, please refer to the PDF document or feel free to contact us.

  • Other inspection equipment and devices
  • Transformers
  • others

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Overload protection device "TORQUE LIMITERS"

Overload protection device "TORQUE LIMITERS"

Outstanding performance and high reliability! Choose from a rich lineup of all 8 series.

"TORQUE LIMITERS" are overload protection devices that can accurately transmit torque. They have no backlash and high rigidity, with precise return positions after overload disconnection, and can detect overload. They employ a unique mechanical torque disconnection mechanism using ball & ball pockets and roller & roller pockets. 【Features of the TF Series】 ■ Directly mountable to tables, sprockets, pulleys, arms, etc. ■ Standardized small series ■ Minimum disconnection torque of 0.3 N·m ■ Have a long history, abundant track record, and high reliability ■ Suitable for Sundex D, DU, DR, and P series *For more details, please refer to the PDF document or feel free to contact us.

  • Torque Control

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Instantaneous voltage drop protection device compliant with SEMI2-F47/UL standards.

Instantaneous voltage drop protection device compliant with SEMI2-F47/UL standards.

Instantaneous low voltage protection device using large-capacity electric double-layer capacitors (compliant with SEMI2-F47/UL standards)

The "UNICap(R) SRT/PFU series" is a momentary voltage drop protection device that replaces traditional batteries from Eaton Corporation in the United States with large-capacity electric double-layer capacitors. By using capacitors that are more environmentally friendly instead of conventional lead batteries, it is possible to reduce the total cost of equipment maintenance. In particular, this power supply is designed to comply with the SEMI 2-F47 standard, considering its use in FAB environments such as semiconductor manufacturing plants. 【Features】 ■ Green technology ■ Full lineup (1kVA to 550kVA) ■ Up to 8Mw ■ Capacitor lifespan (10 to 15 years) ■ High efficiency, etc. *For more details, please download the PDF or feel free to contact us.

  • Pressure Control

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[Research Material] Global Market for Low Voltage Protection & Control Devices

[Research Material] Global Market for Low Voltage Protection & Control Devices

Global Market for Low Voltage Protection & Control Devices: Protection Devices, Switching Devices, Monitoring Devices, Residential, Commercial, Industrial

This research report (Global Low Voltage Protection and Control Devices) investigates and analyzes the current status and outlook for the global market of low voltage protection and control devices over the next five years. It includes information on the overview of the global low voltage protection and control devices market, trends of major companies (sales, selling prices, market share), market size by segment, market size by major regions, and distribution channel analysis. The market segments by type include protection devices, switching devices, and monitoring devices, while the segments by application focus on residential, commercial, and industrial uses. The regional segments are divided into North America, the United States, Europe, Asia-Pacific, Japan, China, India, South Korea, Southeast Asia, South America, the Middle East, and Africa to calculate the market size of low voltage protection and control devices. It also includes the market share of major companies in low voltage protection and control devices, product and business overviews, and sales performance.

  • Other services

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[Research Material] Global Market for Transmission Overload Protection Devices

[Research Material] Global Market for Transmission Overload Protection Devices

Global Market for Transmission Overload Protection Devices: Linear Transmission Overload Protection Devices, Torque Transmission Overload Protection Devices, Positive Torque Transmission Overload Protection Devices, Friction Torque Transmission ...

This research report (Global Transmission Overload Protector Market) investigates and analyzes the current status and outlook for the global transmission overload protector market over the next five years. It includes information on the overview of the global transmission overload protector market, trends of major companies (sales, selling prices, market share), market size by segment, market size by major regions, and distribution channel analysis. The market segments by type include linear transmission overload protectors, torque transmission overload protectors, positive torque transmission overload protectors, and friction torque transmission overload protectors. The segments by application focus on the automotive industry, aerospace industry, and others. The regional segments are divided into North America, the United States, Europe, Asia-Pacific, Japan, China, India, South Korea, Southeast Asia, South America, the Middle East, and Africa, to calculate the market size of transmission overload protectors. It also includes the market share of major companies in the transmission overload protector market, product and business overviews, and sales performance.

  • Other services

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[Research Material] Global Market for Protective Devices for Coronary Artery Embolism

[Research Material] Global Market for Protective Devices for Coronary Artery Embolism

Global Market for Protective Devices for Coronary Artery Embolism: Distal Occlusion Devices, Distal Filters, Proximal Occlusion Devices, Hospitals, Clinics

This research report (Global Coronary Embolic Protection Device Market) investigates and analyzes the current status and outlook for the global market of coronary embolic protection devices over the next five years. It includes information on the overview of the global coronary embolic protection device market, trends of major companies (sales, selling prices, market share), market size by segment, market size by major regions, and distribution channel analysis. The market segments by type include distal occlusion devices, distal filters, and proximal occlusion devices, while the segments by application focus on hospitals and clinics. The regional segments are categorized into North America, the United States, Europe, Asia-Pacific, Japan, China, India, South Korea, Southeast Asia, South America, the Middle East, and Africa, to calculate the market size for coronary embolic protection devices. It also includes the market share of major companies in the coronary embolic protection device sector, product and business overviews, and sales performance.

  • Other services

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Free demo and testing of the device "Dacon Anshin" that protects processed goods from scratches is currently underway.

Free demo and testing of the device "Dacon Anshin" that protects processed goods from scratches is currently underway.

Depreciation in 13 months, just 4.7 months with unmanned operation! A device that prevents dents and scratches on produced goods. *Free provision of a catalog and a table of implementation results showcasing economic effects!

"Dakon Anshin" is a device designed to prevent dents and scratches that occur when products processed by NC automatic lathes and hot forging come into contact with each other as they are discharged from the machine. Traditionally, quality control requires constant human supervision, but by using "Dakon Anshin," it is possible to prevent dents and scratches while also achieving labor savings. In the case of introducing the SP-1 series, it can be depreciated in 13 months, and if operated unmanned, it can be amortized in 4.7 months! 《Currently, we are conducting a "free demo test" to confirm the high quality of the products.》 【Features】 - "Dakon" scratches can be used safely and for multiple purposes. - Increased productivity through short-term and long-term unmanned operation. - Easy operation! Equipped with casters for easy movement. *If you wish to request a demo test, please contact us with "Demo Request" clearly stated. *The comprehensive catalog and implementation results for "Dakon Anshin" can be viewed as a PDF from the download section.

  • Other processing machines

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Are you troubled by dents and scratches on your products? *Case studies are now available.

Are you troubled by dents and scratches on your products? *Case studies are now available.

A device to protect processed goods from scratches, "Dacon Anshin"! Reduces dents and achieves long hours of unmanned operation. Also compatible with airless technology!

Ito Precision Manufacturing's "Dacon Anshin" is a device designed to prevent dents and scratches (abrasions) that occur when products processed by NC automatic lathes, forging, pressing, etc., come into contact with each other as they are ejected from the machine. Traditionally, it was necessary for a person to be present for quality control, but by using this product, it prevents Dacon scratches and abrasions, achieving automation, labor reduction, and long hours of unmanned processing. Since it can also be proposed without air, it contributes to energy savings within the factory! ~ Currently, we are publishing a collection of 10 case studies that demonstrate the benefits of implementation! ~ For example, in the case of introducing the SP-2T model, defects reduced from 20% to less than 1%, resulting in a significant decrease in defective products and enabling cost reduction and labor hour reduction. 【Product Features】 - Multi-purpose use with "peace of mind" against "dents" - Increased productivity through short and long-term unmanned operation - Easy to operate and easy to move with casters 【Demo Units Available for Loan】 ★ We also offer demo and testing support. Please feel free to contact us. * For more details, please refer to the catalog and performance materials available for download in the PDF below. * Custom designs, manufacturing, and special specifications tailored to customer requests are also possible.

  • Other processing machines

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[NMR Pipe Protector Verification Results] City, University of London

[NMR Pipe Protector Verification Results] City, University of London

Complete protection of piping from red rust corrosion through black rust formation! A case that has been usable for over 40 years!

London City University is one of the famous universities located in North London, using SGP for its air conditioning hot water piping. The piping in the building, which is over 40 years old, was experiencing red rust corrosion. To completely protect the piping from red rust corrosion, the "NMR Pipe Protector" was installed. Before installation, the iron content in the water due to red rust was 3.407 mg/l, but two weeks after installation, the iron content decreased to 0.084 mg/l. This demonstrated that our product prevents the occurrence of new red rust in the piping and reduces existing red rust to inert black rust. [Introduction Overview] ■ Building Name: London City University ■ Location: London, UK ■ Building Overview: 47 years old, university ■ Installation Date: June 13, 2013 ■ Installed Piping/Number of Units: Air conditioning hot water piping/PT-200DS x 1 unit *For more details, please refer to the PDF document or feel free to contact us.

  • Piping Materials

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『MT-V24・MT-V11・MT-RS485』

『MT-V24・MT-V11・MT-RS485』

Optimal for instrumentation and process control signals! Coupling arrangements are also possible according to the required signals!

The "MT-V24, MT-V11, and MT-RS485" are integrated devices that include three types of elements: gas discharge tubes, varistors, and suppression diodes, all within a width of 6.2mm. They have a high capacity for surge current and can be arranged in series according to the required signals. You can choose between grounded and ungrounded types with a single ground. They are ideal for instrumentation and process control signals. 【Specifications】 ■ Model: MT-V24 (RS232), MT-V11 (RS422), MT-RS485 (RS485) ■ Rated Voltage: DC15V / DC12V ■ Surge Current Capacity: 5kA (8/20μs) ■ Dimensions: Width 75mm × Depth 30mm × Height 55mm *For more details, please feel free to contact us.

  • Other Connectors
  • connector

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DC surge protector for solar power generation (IEC certified) SPPV

DC surge protector for solar power generation (IEC certified) SPPV

Protecting you from electrical waves - the DC surge protector continues to operate as a reliable shield.

The plug-in surge protectors SPPVT2 and SPPVT12 have been developed specifically for applications in solar power generation. These devices protect electrical equipment from transient overvoltages caused by direct or indirect lightning strikes. Houses with solar power systems installed on their roofs have additional vulnerability factors, making surge protection necessary. In this case, a combination of Type 1 and Type 2 protection is typically required for DC protection. This is based on whether there are requirements for external lightning protection systems for the building. The surge protector SPPVT12 protects electrical equipment from transient overvoltages caused by direct lightning strikes. These surge protectors are suitable for various surge protection needs in many systems.

  • SPPVT2 T12.png
  • SPPVT2 T12 2.png
  • SPPVT2 T12 3.png
  • others

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Lightning damage prevention Direct lightning waveform response SPD for ITV and surveillance cameras

Lightning damage prevention Direct lightning waveform response SPD for ITV and surveillance cameras

Lightning damage prevention: Direct lightning waveform (10/350μs 2.5kA) compatible SPD for ITV and surveillance cameras.

Lightning arresters that protect equipment from lightning surge voltage and current entering coaxial cables for ITV, surveillance cameras, and data transmission devices. ■□■Features■□■ ■CSA-NT - By combining a three-pole arrester and a neutral wire loop, it improves protection characteristics while also absorbing transmission noise. - Compatible not only with conventional induced lightning waveforms of 8/20μs but also with direct lightning waveforms of 10/350μs. - Rail mountable (35mm wide rail). - Ideal for protecting weak voltage ITV coaxial lines. - Optimal for transmission methods where DC power is superimposed on coaxial lines. ■CSA-HS - Combines a three-pole arrester with semiconductor elements to enhance protection characteristics. - Compatible not only with conventional induced lightning waveforms of 8/20μs but also with direct lightning waveforms of 10/350μs. - Rail mountable (35mm wide rail). ■Other details can be viewed by downloading the catalog. If you would like a catalog, please contact us through the request for materials.

  • Circuit breakers and switches

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Communication SPD "ASG Series"

Communication SPD "ASG Series"

Send the SPD fault status remotely! A comprehensive lineup tailored to protective circuit mechanisms!

The ASG series is an SPD failure monitoring system that transmits the failure status of the SPD to a remote monitoring system from the SPD installation location. It is used in combination with the ASG-SPD unit with failure indication, a dedicated power supply unit, and an alarm unit. 【Features】 ■ Failure indication function ■ Excellent protection circuit mechanism ■ Comprehensive measures against ground noise ■ High number of protection circuits per SPD, contributing to space-saving (4-5 circuits) ■ Compliant with JISC5381-21 Category C2, D1 *For more details, please refer to the catalog or feel free to contact us.

  • Other power sources

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