• JCRB2-100 Type B RCDs
  • JCRB2-100 Type B RCDs
  • JCRB2-100 Type B RCDs
  • JCRB2-100 Type B RCDs
  • JCRB2-100 Type B RCDs
  • JCRB2-100 Type B RCDs
  • JCRB2-100 Type B RCDs
  • JCRB2-100 Type B RCDs

JCRB2-100 Type B RCDs

JCRB2-100 Type B RCDs provide protection against residual fault currents / earth leakage in AC supply applications with specific waveform characteristics.

Type B RCDs are used where smooth and/or pulsating DC residual currents can occur, non-sinusoidal waveforms are present or frequencies greater that 50Hz; for example, Electric Vehicle Charging, certain 1-phase devices, micro generation or SSEGs (Small Scale Electricity Generators) such as solar panels and wind generators.


Type B RCDs (Residual Current Devices) are a type of device used for electrical safety. They are designed to provide protection against both AC and DC faults, making them suitable for a wide range of applications, including those involving DC sensitive loads such as electric vehicles, renewable energy systems, and industrial machinery. Type B RCDs are essential for providing comprehensive protection in modern electrical installations.

Type B RCDs provide a level of safety beyond what conventional RCDs can provide.  Type A RCDs are designed to trip in the event of an AC fault, while Type B RCDs can also detect DC residual current, making them suitable for growing electrical applications. This is particularly important as demand for renewable energy systems and electric vehicles continues to grow, creating new challenges and requirements for electrical safety.

One of the main advantages of Type B RCDs is their ability to provide protection in the presence of DC sensitive loads. For example, electric vehicles rely on direct current for propulsion, so appropriate levels of protection must be in place to ensure the safety of the vehicle and charging infrastructure. Likewise, renewable energy systems (such as solar panels) often operate on DC power, making Type B RCDs an important component in these installations.

The most important features

DIN rail mounted

2-Pole / Single Phase

RCD Type B

Tripping Sensitivity: 30mA

Current rating: 63A

Voltage rating: 230V AC

Short-circuit current capacity: 10kA

IP20 (needs to be in suitable enclosure for outdoor use)

In accordance with IEC/EN 62423 & IEC/EN 61008-1

Technical Data

Standard  IEC 60898-1, IEC60947-2
Rated current  63A
Voltage  230 / 400VAC ~ 240 / 415VAC
CE-marked  Yes
Number of poles  4P
Class  B
IΔm  630A
Protection class  IP20
Mechanical life  2000 connections
Electrical life  2000 connections
Operating temperature  -25… + 40˚C with an ambient temperature of 35˚C
Type Description  B-Class (Type B) Standard protection
Fits (among others)

What is a Type B RCD?

Type B RCDs must not be confused with Type B MCBs or RCBOs that show up in many web searches.

Type B RCDs are totally different, however, unfortunately the same letter has been used which can be misleading. There is the Type B that is the thermal characteristic in an MCB/RCBO and Type B defining the magnetic characteristics in an RCCB /RCD. This means that so you will find products such as RCBOs with two characteristics, namely the magnetic element of the RCBO and the thermal element (this could be a Type AC or A magnetic and a Type B or C thermal RCBO).

How do Type B RCDs work?

Type B RCDs are usually designed with two residual current detection systems. The first uses 'fluxgate' technology to enable the RCD to detect smooth DC current. The second uses a technology similar to Type AC and Type A RCDs, which is voltage independent.

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