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Add-on RCCBs

Diff-o-Click - Add-on RCCBs

Used to provide supplementary protection for people from the risk of electrocution and protection against the risk of an electrical fire and overcurrent protection of equipment and cables when combined with 2P, 3P and 4P MCBs.

Features and benefits

  • In accordance with BSEN 61009
  • Unique connection system provides optimum user safety
  • For use with 2P, 3P & 4P MCB's up to 63A (up to 125A using HTi MCB and HTi add-on RCD)
  • People protection against the risk of electrocution 10mA, 30mA and 100mA and above mainly protection against the risk of an electrical fire
  • 30mA, 100mA, 300mA, 500mA and 1000mA sensitivities
  • Available in type AC, A and S (Selective/Time delayed)


Thermal settings ln (A) 32, 63
Residual current I∆n (mA) 30, 100, 300, 500, 1000

Rated voltage AC Un (V)


2P: 240/415
3P: 415
4P: 415

Minimum operating voltage U B min (V)


2P: 205,
3P: 205
4P: 205
Mechanical/electrical endurance 20000/10000
Tropicalisation EN/IEC 60068-2/3 and DIN 40046 95%RH at 55°C

Terminal capacity flexible/rigid cable (mm 2 )



2P 32 & 63A: 25-35
3P 32 & 63A: 25-35
4P 2 mod. 32A: 16
4P 32 & 63A 4 mod.: 25-35
Poles 2, 3, 4

Nuisance tripping resistance


Type A, AC: 250A 8/20µs;
200A 0.5µs - 100kHz
Type S: 3000A 8/20µs

Ambient temperature (°C)


Type AC: -5 up to 55
Type A, S: -25 up to 55

Weight (g/pole)


2P: 250
3P: 320
4P: 340