B10R4040-100-A IMO RCD 10KA, 100mA 3 Pole + N, 40 Amp, 415VAC

Why Choose the IMO B10R4040-100-A Type A Residual Current Circuit Breaker?

The IMO B10R4040-100-A is a dependable Type A Residual Current Circuit Breaker (RCCB) designed to protect commercial and industrial electrical installations against earth leakage faults. Manufactured by IMO Precision Controls, this four-pole device monitors the current flowing through a three-phase plus neutral circuit and disconnects the electrical supply when residual current reaches its specified operating threshold.

Its Type A residual current characteristic enables the B10R4040-100-A to detect both sinusoidal AC residual currents and pulsating DC residual currents. This makes it suitable for modern installations containing electronic controls, rectifier circuits, switch-mode power supplies and other equipment capable of producing pulsating DC leakage.

With a 40 A rated current, 100 mA rated residual operating current and four-pole configuration, the IMO B10R4040-100-A provides reliable earth fault protection for three-phase distribution systems. Its compact DIN rail format supports straightforward installation within electrical distribution boards, machinery panels and building-services equipment.

Key Advantages

• Dependable four-pole residual current protection for three-phase plus neutral circuits.
• 40 A rated current for commercial and industrial electrical installations.
• 100 mA residual current sensitivity for earth fault and fire-risk protection.
• Type A detection for sinusoidal AC and pulsating DC residual currents.
• 10 kA rated conditional short-circuit current.
• Compact DIN rail mounting for straightforward panel installation.

Key Features

• IMO B10R residual current circuit breaker series.
• 40 A rated current.
• 100 mA rated residual operating current (IΔn).
• Type A residual current characteristic.
• Three-phase plus neutral, four-pole configuration.
• 400 V AC rated voltage.
• 50/60 Hz rated frequency.
• 10 kA conditional short-circuit rating.
• Integrated test button for routine operational checks.
• DIN rail mounting to EN 60715.
• Designed in accordance with IEC 61008-1.
• Requires separate overload and short-circuit protection.

Type A Earth Leakage Protection for Modern Installations

A Type A RCCB continuously compares the current flowing through the live conductors of an electrical circuit. When an imbalance indicates that current is leaking to earth, the device automatically disconnects the supply. Type A devices can respond to both sinusoidal alternating leakage currents and pulsating DC leakage currents generated by many modern electronic loads.

The 100 mA operating sensitivity is commonly selected for earth fault and fire-risk protection in commercial and industrial installations. It is not normally used as a substitute for 30 mA additional protection where protection against electric shock is required. The B10R4040-100-A should therefore be incorporated into a properly coordinated protection system designed in accordance with applicable wiring regulations.

Typical Applications

• Three-phase commercial distribution boards.
• Industrial electrical distribution systems.
• Machine control panels.
• Circuits containing electronic control equipment.
• Equipment incorporating rectifiers or switch-mode power supplies.
• Manufacturing and processing facilities.
• Building-services installations.
• Circuits requiring 100 mA Type A earth leakage protection.