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Protective Device Product List and Ranking from 20 Manufacturers, Suppliers and Companies

Last Updated： Aggregation Period:Oct 15, 2025～Nov 11, 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:Oct 15, 2025～Nov 11, 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. アローズエンジニアリング Chiba//Testing, Analysis and Measurement
  3. 山田電機製造 Aichi//others
  4. 4 null/null
  5. 5 伊藤精密製作所 MSTEC事業部 Gifu//others
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Protective Device Product ranking

Last Updated： Aggregation Period:Oct 15, 2025～Nov 11, 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 Are you troubled by dents and scratches on your products? *Case studies are now available. 伊藤精密製作所 MSTEC事業部
  5. 5 Super Compact Design Torque Limiter - Overload Protection Device マツイ 東京本社

Protective Device Product List

16～30 item / All 53 items

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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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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] Fukuoka Prefecture Condominium

[NMR Pipe Protector Verification Results] Fukuoka Prefecture Condominium

After 16 years of installation, the effectiveness verification shows a reduction in red rust blockage rate from 50.7% to 41.2%, an improvement of 18.7%! This demonstrates the effectiveness of red rust prevention and pipe lifespan extension.

A follow-up survey was conducted in a condominium in Fukuoka Prefecture, 16 years after the installation of the NMR pipe protector. Before installation, the joints of the water supply pipes in Rooms A and B were inspected with a fiberscope, revealing red rust blockage rates of 50.7% and 78.2%, respectively, indicating significant progression of red rust blockage and the need for early intervention. Consequently, the NMR pipe protector was installed in the water supply piping. One year after installation, a follow-up survey was conducted under the same conditions as before installation, and the red rust blockage rates for Rooms A and B were as follows: [One Year After Installation] Room A: 50.7% → 48% [5.3%] reduction improvement Room B: 78.2% → 74.1% [5.2%] reduction improvement [Sixteen Years After Installation] Room A: 50.7% → 41.2% [18.7%] reduction improvement Room B: 78.2% → 68.4% [12.5%] reduction improvement From the above reduction improvement rates in red rust blockage, it was demonstrated that the NMR pipe protector completely prevented the occurrence of new red rust and that the red rust blockage transformed into black rust with a volume reduction to one-tenth. Additionally, it was proven that as long as this condominium remains standing for another 20 or 30 years, pipe replacement will not be necessary.

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  • 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.

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  • others

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Built-in separator agreement dimensions SPD

Built-in separator agreement dimensions SPD

Protecting equipment from lightning surges that enter through the power supply.

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 Class 2 (JIS C 5381-11) Compliant

  • Other safety equipment

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