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Miniature Circuit Breakers BH-D, BV-D, KB-D
Low-voltage Power Distribution Products
Miniature Circuit Breakers BH-D, BV-D, KB-D

For control panel and power distribution panel branch circuits.

In addition to overload and short-circuit protection for low voltage circuits, we also have the optimal products for earth leakage protection. Mainly they are used for household and similar installations. These are compact breakers from 0.1 to 63 A for installation on 35 mm IEC rails. These are widely used on control panel and power distribution panel branch circuits.



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 Types of Low-voltage Circuit Breakers

The following IEC Standards apply to low-voltage circuit breakers.
There are multiple product standards for the same type of device.
The standards system applies to industrial use (a skilled person handling the device) and household use (a person handling device has no experience.)

Typical
abbreviation

IEC standard

Mitsubishi Models

MCCB,
ACB

IEC 60947-2

Low-voltage switchgear and control gear - Part 2:
Circuit-breakers

NF type low-voltage circuit breaker
AE type low-voltage air circuit breaker

ELCB

IEC 60947-2
Annex B

Low-voltage switchgear and control gear - Part 2:
Circuit-breakers Annex B: Circuit-breakers incorporating residual current protection

NV type earth leakage circuit breaker

MCB

IEC 60898-1/-2

Circuit-breakers for overcurrent protection for household and similar installations

BH-D, BHW-T type miniature circuit breaker

RCCB

IEC 61008-1

Residual current operated circuit-breakers without integral overcurrent protection for household and similar uses (RCCBs)

BV-D, BVW-T type earth leakage circuit breaker

RCBO

IEC 61009-1

Residual current operated circuit-breakers with integral overcurrent protection for household and similar uses (RCBOs)

BV-DN type earth leakage circuit breaker

CBE

IEC 60934

Circuit-breakers for equipment

CP type circuit protector

·         ACB: Air Circuit Breaker

·         MCCB: Molded Case Circuit Breaker

·         ELCB: Earth-Leakage Circuit Breaker

·         MCB: Miniature Circuit Breaker

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