BG Bi-Directional MCB B Curve Single Pole 6A CUMB6

BG CUMB6 — 6A B Curve Single-Pole Bidirectional MCB (6kA, 1 Module)

The BG CUMB6 is a 6A B-curve, single-pole bidirectional MCB designed for precise overload and short-circuit protection on lighting, control and low-load domestic circuits. Its bidirectional design allows safe operation even when current flows in either direction, making it suitable for installations that incorporate solar PV, battery storage or other back-feed capable technologies.

With a slim 17.85mm single-module width, it fits neatly into BG consumer units and 35mm DIN-rail enclosures, offering a compact, space-efficient protective device for modern installations.

The B-curve tripping characteristic provides the fast response required for sensitive low-inrush circuits such as:

Domestic lighting

Control and switching circuits

Smart home and automation feeds

Low-load radials

A 6kA breaking capacity ensures dependable short-circuit protection suitable for domestic and small commercial environments.

Built for ease of installation and durability, the CUMB6 offers:

Positive contact status indication

PZ2 screw terminals for secure termination

Terminal capacity up to 16mm² (10–32A models; 6A model supports smaller conductors)

–25°C to +40°C operating temperature range

4,000 electrical and 10,000 mechanical endurance cycles

A robust choice for contractors seeking a high-quality protective device for low-load circuits.

Key Features of the BG Bi-Directional MCB 6A Include:

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

View all BG MCBs

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