Description

The ABB MCBH-00 is a contact block holder module for use with ABB’s M2 series modular pushbutton components, providing the mechanical interface that enables additional contact block modules to be stacked onto an operator actuator when more contacts are required than the actuator can directly accommodate. Unlike contact blocks such as the MCBH-01 or MCBH-10, the MCBH-00 itself contains no electrical contacts but serves as a spacer and mounting interface to extend the modular contact stack on an operator device. It is designed for use with ABB modular pushbuttons in the M2 range.

The MCBH-00 is a practical accessory for panel builders and machine builders who need to expand the contact capacity of a single operator unit beyond the standard direct-mount limit. By inserting the MCBH-00 as a base holder, additional MCBH contact blocks providing further N.O. or N.C. contacts can be added to the assembly, enabling multi-output operator devices to be constructed within the compact dimensional envelope of the M2 operator system. This approach avoids the need for additional panel apertures or external auxiliary relay circuits in many applications.

As part of ABB’s M2 modular operator system, the MCBH-00 ensures dimensional compatibility and secure mechanical engagement within the contact block stack. It is used wherever the standard push-fit contact block capacity of an ABB M2 pushbutton is insufficient for the circuit requirements, providing a systematic and approved means of contact expansion. Panel builders and electrical engineers working on complex motor control, safety, and signalling circuits will find the MCBH-00 an important component in constructing multi-function operator devices from ABB’s modular components.