Differential Class B 40A, 30mA OMU | ADAJUSA
Differential Class B 40A, 30mA OMU | ADAJUSA

Differential 4 poles 40A 30mA Class B

€184.54 Tax included

€152.51 tax excl.

Three- phase differential 4 poles (3P+N) 40A 30mA (0.03A) class B. It allows the detection of 50Hz sinusoidal and pulsating signals with mixed components and pure direct current component signals, ensuring at all times the protection of people against insulation/derivation problems in installations or electrical elements. Breaking power 10kA.

Class "B" is suitable for protection and monitoring of computer equipment (UPS), frequency converters, three-phase battery chargers, electric vehicle chargers and photovoltaic installations. The use of a type B differential is recommended in all applications where the appearance of a DC component is expected.

Reference: OMR104B40003







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Protection differential switch 40A 30mA (0.03A), category B, 4 poles, for the protection of people against insulation/derivation problems in installations or electrical elements. It allows the detection of alternating leakage current, pulsating current and pure direct current.


 Use class "B" is suitable for protection and monitoring of computer equipment (UPS), frequency converters, three-phase battery chargers, electric vehicle chargers and photovoltaic installations. Class B RCDs can be considered suitable for all difficult applications, not only in terms of protection, but also of operational continuity. The use of a type B circuit breaker is recommended in all applications where the appearance of a DC component is expected.

In this type of RCD, tripping is ensured as in class A RCDs and also in the case of residual currents coming from rectified circuits in DC or high frequencies in AC. They provide protection in case of continuous power failures in three-phase networks, generated by controllers and frequency inverters, batteries, inverters, UPS/UPS power supplies.

Neutral position on the right side.


Technical characteristics:

  • Manufacturer/Supplier: OMU/Mixvil 
  • Reference: OMR104B40003
  • Number of poles: 4 (3 Poles + Neutral)
  • Class B
  • Operating voltage: 415Vac 50Hz
  • Rated current (In): 40A
  • Sensitivity (IΔn): 30mA
  • Breaking power: 10kA
  • Rated non-operating fault current: 0.5 x IΔn
  • Type of operation: Electromagnetic release
  • Regulations: IEC/EN 61008-1
  • Fixation: DIN rail
  • Dimensions: 4 modules
  • Degree of protection: IP20
  • Operating temperature: -25°C to +45°C
  • Humidity: Max.95%




Material for professional use, it must be installed by qualified personnel in compliance with the regulations in force at the place of installation.

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