FuseBox RTA064030B RCBO SPN 40A 30mA 6kA

The FuseBox RTA064030B is a 40A RCBO (Residual Current Breaker with Overcurrent Protection) designed to provide combined protection against overloads, short circuits, and earth leakage faults in residential and light commercial electrical installations. It integrates MCB and RCD functions into a compact single-module device, helping save space in consumer units while maintaining full circuit protection.

It has a B Curve tripping characteristic, meaning it is suitable for general-purpose circuits with low to moderate inrush currents such as socket outlets, radial circuits, and fixed appliances. The Type A residual current protection detects both AC and pulsating DC fault currents, making it compatible with modern electrical installations that include electronic loads and energy-efficient devices.

With a 6kA short-circuit breaking capacity and 30mA earth leakage sensitivity, the RTA064030B provides reliable protection against electric shock and fire hazards. It also features double-pole switching (live and neutral isolation) for improved safety during maintenance and fault conditions.

Designed for FuseBox consumer units, it is a compact DIN rail-mounted device with a flying neutral connection for quick installation. It complies with IEC/EN 61009-1 standards and supports 18th Edition wiring regulation requirements.

Key Features

• 40A current rating
• Type A residual current protection
• B Curve tripping characteristic (3–5× In)
• 30mA earth leakage sensitivity
• 6kA short-circuit breaking capacity
• 1P+N configuration with neutral switching
• Compact single-module DIN rail design
• Flying neutral lead for installation