Why Choose the ABB MCBH-12 Block Holder with Contact Blocks?
The ABB MCBH-12 is a modular contact block assembly with a three-position holder, one normally open and two normally closed contacts, designed for ABB's 22 mm modular pilot device range. Supplied under ABB order code 1SFA611605R1121, it provides a ready-assembled switching solution for compatible pushbuttons, emergency stop operators, selector switches and other industrial control devices.
The MCBH-12 combines a 1 NO + 2 NC contact configuration with ABB's three-position holder. This mixed contact arrangement provides three independent switching contacts in one compact assembly, making it suitable for applications requiring simultaneous normally open and normally closed signalling or control functions.
Designed for front mounting behind compatible ABB modular operators, the MCBH-12 uses silver contacts and screw-terminal connections for reliable industrial wiring. It is rated for up to 690 V, offers high mechanical durability and integrates directly with ABB's modular plastic pilot device system.
Key Advantages
- Complete three-position holder with three contact blocks.
- 1 NO + 2 NC contact configuration provides flexible control and signalling options.
- Designed for ABB's 22 mm modular pilot device system.
- Front-mounted modular construction simplifies installation behind compatible operators.
- Screw-terminal connections provide secure and straightforward control-panel wiring.
- High mechanical durability supports reliable operation in industrial machinery and automation systems.
Key Features
- ABB MCBH modular contact block assembly.
- 1 normally open + 2 normally closed contacts.
- Three contact blocks supplied with holder.
- Three-position holder.
- Suitable for ABB 22 mm modular pilot devices.
- Front mounting.
- Silver (Ag) contacts.
- Screw-terminal connection.
- Non-illuminated accessory.
- 690 V rated insulation voltage.
Contact blocks convert the mechanical movement of a panel-mounted operator into electrical switching within a control circuit. The ABB MCBH-12 provides one normally open and two normally closed contacts, allowing a single operator action to provide multiple control, interlocking or signalling functions where the circuit design requires both NO and NC switching.
The integrated three-position holder simplifies assembly by combining the contact blocks and mounting interface into one modular unit. The MCBH-12 can be paired with a wide range of compatible ABB modular pushbuttons, selector switches, emergency stop operators and other 22 mm pilot devices, providing a convenient method of configuring the required switching arrangement behind the panel operator.
Typical Applications
- Industrial pushbutton and selector switch assemblies.
- Emergency stop and machine stop operator assemblies.
- Machine interlocking and control circuits.
- Automation and industrial control panels.
- Production and manufacturing equipment.
- Conveyor and material handling controls.
- OEM machinery and electrical control assemblies.
