Why Choose the ABB MCBH-20 Block Holder with Contact Blocks?
The ABB MCBH-20 is a modular contact block and holder assembly designed for ABB industrial pilot devices and operator controls. Supplied as a complete assembled unit, it combines a 3-position holder with two normally open (2 NO) contact blocks, providing a convenient solution for completing compatible pushbutton, selector switch, toggle switch and machine-control assemblies.
Part of the ABB Modular pilot device range, the MCBH-20 is designed for non-illuminated operators and uses front mounting for straightforward assembly behind compatible operator heads. Its two normally open contacts provide two independent switching paths that close when actuated by the associated pilot-device operator.
The MCBH-20 is rated for industrial control duty, including 6 A at 230 V AC AC-15 and 5 A at 24 V DC DC-13. Screw-clamp terminals support secure field wiring, while a mechanical durability of 10 million operations makes the assembly suitable for frequently operated industrial machinery and automation equipment.
Key Advantages
- Complete block holder with two normally open contact blocks.
- 2 NO contact configuration provides two normally open switching circuits.
- Includes a 3-position holder for ABB modular pilot-device assemblies.
- Front mounting supports straightforward installation behind compatible operators.
- Screw-clamp terminals provide secure industrial control wiring.
- Mechanical durability of 10 million operations for dependable long-term service.
- Compatible with a broad selection of ABB modular pushbutton, selector, toggle and mushroom-head operators.
Key Features
- ABB MCBH modular contact block assembly.
- Two normally open (2 NO) auxiliary contacts.
- 3-position holder included.
- Front-mounted configuration.
- Designed for ABB 22 mm modular pilot devices.
- Suitable for non-illuminated operators.
- 690 V rated insulation voltage.
- 6 kV rated impulse withstand voltage.
- 6 A at 230 V AC rated operational current for AC-15 duty.
- 5 A at 24 V DC rated operational current for DC-13 duty.
- IP20 terminal protection.
- 10 million operations mechanical durability.
Reliable Contact Switching for Industrial Pilot Devices
Contact blocks translate the mechanical movement of a pushbutton, selector switch or other operator into electrical switching within a control circuit. The ABB MCBH-20 provides two normally open contacts, allowing an associated operator to simultaneously control two separate normally open circuits when actuated.
The integrated 3-position holder provides the mechanical interface between compatible ABB modular operators and the contact blocks. Combined with front mounting, screw-clamp terminals and industrial AC-15 and DC-13 ratings, the MCBH-20 provides a practical solution for constructing and maintaining operator controls in machinery and automation panels.
Typical Applications
- Industrial pushbutton assemblies.
- Selector and toggle switch assemblies.
- Machine-control panels.
- Industrial operator stations.
- Conveyor and material handling controls.
- Production and packaging machinery.
- OEM automation and machine-building systems.
