ABB · Modular (MP) Series

MCB-10

Name: ABB MCB-10
Brand: ABB
SKU: MCB-10

Active

UL UL Listed — meets US safety standards. Required for NEC-inspected installations. CSA CSA Certified — meets Canadian safety standards. Required for installations in Canada. CE CE Marked — complies with EU directives (Low Voltage, Machinery, EMC).

Modular 1NO Contact Block

Part number: MCB Modular Contact Block

ABB Modular (MP) Series Introduced circa 2005

Single 1NO contact block for ABB Modular push button series. Snap-on mounting to operator heads. Screw terminals.

Common Applications

Contact block from ABB's modular pilot device system. The 1NO contact closes the circuit when the button is pressed — standard for start, enable, and jog functions. Snaps onto the rear of any ABB MP-series push button head using the modular mounting system. The 10A/600V rating handles direct switching of small contactors and relay coils. When troubleshooting an intermittent button on an ABB panel, swap this block first — contact blocks wear faster than the button head and are the most common point of failure. Compatible with MP1, MP2, MP3, and MPET4 series actuators.

Specifications

Certifications Third-party safety certifications. UL = required for US NEC installations. CE = EU compliance. CSA = Canadian standards.	UL, CSA, CE
Contact Configuration Normally Open — circuit is off until you press. Standard for start/go/enable functions.	1NO
Current rating	10A
Terminal Type How you connect wires. Screw clamp is most common in industrial. Spring cage is faster but requires proper ferrules.	Screw Clamp
Max Voltage	600V

Specs with this icon are linked to the manufacturer's original source page

You'll Also Need

This is a modular component. For a complete assembly, you may also need:

MP1-10G recommended

Compatible push button head

MP1-01R recommended

Compatible push button head

MPET4-10R recommended

Compatible push button head

Compatible Alternatives

These products are functionally equivalent cross-references from other manufacturers.

Schneider Electric

ZB4-BZ101

Harmony XB4 1NO Contact Block

Installation Quick Reference

Mounting: Snap onto the rear of any compatible button body in the same series. The latch clicks audibly when properly seated. Some models require a mounting adapter.

Wiring: Terminals are marked NO (11/12) or NC (21/22). Use 0.5-2.5mm² wire with ferrules. Tighten to 0.8 Nm. Verify with a multimeter before energizing.

Wiring Diagram

Troubleshooting

Intermittent switching

Silver contacts are pitted from arcing. Replace the contact block — they are consumable parts. If arcing is severe, check that the switched load doesn't exceed the contact rating (typically 6A at 120VAC).

Contact block won't snap onto button body

Verify the contact block series matches the button head series (e.g., Schneider ZB4 blocks fit ZB4 heads only, not ZB5). Check for debris or damage on the mounting tabs.