BG Bi-Directional MCB B Curve Single Pole 10A CUMB10

BG CUMB10 — 10A B Curve Single-Pole Bidirectional MCB (6kA, 1 Module)

The BG CUMB10 is a 10A B-curve single-pole bidirectional MCB, designed to provide reliable overload and short-circuit protection for lighting and general-purpose domestic circuits. With certified bidirectional operation, the device trips safely even where current may flow in both directions—ideal for installations featuring solar PV, battery storage or back-feed-capable systems.

Its compact 17.85mm single-module width ensures easy integration into BG consumer units and any 35mm DIN-rail enclosure.

Precise Protection for Lighting & Low-Load Circuits

The B-curve tripping profile ensures rapid disconnection on low-inrush circuits such as lighting, control circuits and small domestic radial circuits. A 6kA breaking capacity delivers strong short-circuit protection across a variety of low to medium load applications, including:

Domestic lighting circuits

Control and switching circuits

Small domestic radial circuits

Engineered for quick installation and dependable operation, the CUMB10 includes:

Positive contact status indication for easy circuit verification

PZ2 screw terminals for secure terminations

Up to 16mm² terminal capacity (10–32A models)

Operating range of –25°C to +40°C

4,000 electrical and 10,000 mechanical endurance cycles

A robust, contractor-approved protective device built for long-term reliability.

Key Features of the BG Bi-Directional MCB 10A Include:

• 10A B-Curve Single-Pole Bidirectional MCB
• Ideal for Lighting, Control Circuits & Low-Load Applications
• Suitable for PV, Battery Storage & Back-Feed Systems
• 6kA Breaking Capacity for Reliable Fault Protection
• Compact 1-Module (17.85mm) DIN-Rail Design
• Positive Contact Status Indication
• PZ2 Screw Terminals with Up to 16mm² Cable Capacity
• Operating Temperature: -25°C to +40°C
• Durable Mechanism: 4,000 Electrical & 10,000 Mechanical Operations
• Compliant with IEC/EN 60898 Standards

View all BG MCBs

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