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B10R4040-30-A IMO RCD 10KA, 30mA 3 Pole + N, 40 Amp, 415VAC
£67.38
Why Choose the IMO B10R4040-30-A Type A Residual Current Circuit Breaker?
The IMO B10R4040-30-A is a high-performance Type A Residual Current Circuit Breaker (RCCB) designed to provide dependable protection against earth leakage faults in commercial, industrial and electrical distribution systems. Manufactured by IMO Precision Controls, this four-pole RCCB continuously monitors current balance and rapidly disconnects the electrical supply when hazardous leakage currents are detected, helping protect personnel, equipment and installations.
Unlike a standard Type AC RCCB, the Type A version detects both sinusoidal AC residual currents and pulsating DC residual currents, making it ideal for installations containing variable speed drives, switch-mode power supplies, EV charging equipment, electronic controls and other modern electrical loads.
With a 40A rated current, 30mA residual operating current, 415V AC three-phase plus neutral supply and a 10kA conditional short-circuit rating, the IMO B10R4040-30-A provides additional protection against electric shock while delivering reliable earth leakage protection for modern three-phase installations.
Key Advantages
- High-quality 4-pole Type A RCCB for commercial and industrial installations.
- 40A rated current suitable for three-phase electrical circuits.
- 30mA residual current sensitivity for additional protection against electric shock.
- Type A protection for AC and pulsating DC residual currents.
- 10kA conditional short-circuit rating.
- Compact DIN rail mounting for quick installation.
Key Features
- IMO B10R Residual Current Circuit Breaker series.
- 40A rated current.
- 30mA rated residual operating current (IΔn).
- 415V AC operating voltage.
- 3 Pole + Neutral (4 Pole) configuration.
- Type A residual current protection.
- 10kA conditional short-circuit rating.
- DIN rail mounting.
- Manufactured in accordance with IEC 61008-1.
- IP20 protection rating.
Type A Protection for Modern Electrical Systems
Type A RCCBs continuously monitor current flowing through live conductors and disconnect the electrical supply whenever earth leakage currents exceed the rated operating threshold. Unlike Type AC devices, Type A RCCBs detect both alternating residual currents and pulsating DC residual currents generated by modern electronic equipment, making them suitable for today's commercial and industrial installations.
The 30mA operating sensitivity provides additional protection against electric shock, while the four-pole configuration ensures complete monitoring of all live conductors within a three-phase plus neutral system. As with all RCCBs, separate overload and short-circuit protection must be provided by an appropriately rated circuit breaker or fuse.
Typical Applications
- Industrial distribution boards.
- Commercial electrical installations.
- Machine control panels.
- Variable speed drive installations.
- Building services infrastructure.
- EV charging circuits.
- Three-phase power distribution systems with electronic equipment.
Technical Specifications
Tick the specs you need, then view products that match.
| Voltage | 415 V | |
|---|---|---|
| Phase | Three Phase | |
| Poles | 3-pole + N | |
| Device Type | RCD | |
| Residual Current | 30 mA | |
| Manufacturer | IMO Precision Controls | |
| Series | B10R RCCB | |
| Model | B10R4040-30-A | |
| Product type | Type A Residual Current Circuit Breaker (RCCB) | |
| Rated current | 40A | |
| Rated residual operating current | 30mA | |
| Residual current characteristic | Type A | |
| Rated voltage | 230/400V AC (415V AC nominal) | |
| Frequency | 50 / 60Hz | |
| Pole configuration | 3 Pole + Neutral (4 Pole) | |
| Maximum switching time at IΔn | 100ms | |
| Residual tripping current range | 0.5 IΔn to 1 IΔn | |
| Rated conditional short-circuit current | 10kA | |
| Electrical lifetime | More than 4,000 cycles | |
| Terminal capacity | 35mm² solid / 25mm² stranded conductor | |
| Fastening torque | 2.0Nm | |
| Protection rating | IP20 | |
| Mounting type | DIN rail EN 60715 | |
| Operating temperature | -25°C to +55°C | |
| Compliance | IEC 61008-1 | |
| HS Code | 8536201090 | |
| Country of Manufacture | China |
Frequently Asked Questions
What is the IMO B10R4040-30-A used for?
It provides earth leakage protection for three-phase electrical systems and disconnects the supply when dangerous residual currents are detected.
What does Type A mean?
Type A RCCBs detect both alternating AC residual currents and pulsating DC residual currents, making them suitable for installations containing modern electronic equipment.
What is the rated current of this RCCB?
The IMO B10R4040-30-A has a 40A rated current.
Why does this model use 30mA sensitivity?
A 30mA RCCB provides additional protection against electric shock and is widely specified for circuits requiring enhanced personnel protection.
How is the RCCB installed?
The unit mounts directly onto a standard DIN rail inside electrical distribution boards and industrial control panels.
Trusted Protection for Modern Electrical Installations
IMO Precision Controls Type A residual current circuit breakers are trusted by electrical contractors, OEM machine builders and industrial engineers for dependable earth leakage protection, reliable operation and compliance with recognised international safety standards.
