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B10C4040A IMO MCB 10kA, C Curve 4 Pole, 40A
£28.47
Why Choose the IMO B10C4040A Miniature Circuit Breaker?
The IMO B10C4040A is a robust four-pole miniature circuit breaker (MCB) designed to provide dependable overload and short-circuit protection for three-phase electrical systems. As part of the trusted IMO B10 Series, it combines a 40 A rated current, C curve tripping characteristic and a 10 kA breaking capacity, making it an excellent choice for industrial machinery, commercial switchboards and OEM control panels.
The C curve characteristic makes the B10C4040A particularly suitable for circuits supplying inductive equipment with moderate starting currents, including motors, transformers, compressors, HVAC equipment and pumps. Its thermal-magnetic operating mechanism provides reliable overload protection while rapidly disconnecting short-circuit faults to safeguard electrical equipment and wiring.
Designed for installation on a standard 35 mm DIN rail, this compact four-pole breaker provides simultaneous switching of all poles, ensuring safe isolation of three-phase circuits during maintenance or fault conditions. Manufactured in accordance with IEC 60898-1, it delivers dependable long-term performance in demanding industrial environments.
Key Advantages
- Four-pole protection for three-phase electrical systems.
- 40 A rated current for higher power applications.
- C curve tripping characteristic for inductive loads with moderate inrush currents.
- 10 kA short-circuit breaking capacity.
- Thermal-magnetic overload and short-circuit protection.
- Compact DIN rail mounted design for modern distribution boards.
Key Features
- IMO B10 Series miniature circuit breaker.
- Four-pole configuration.
- 40 A rated current.
- C curve tripping characteristic.
- 10 kA breaking capacity.
- Thermal-magnetic operating mechanism.
- Mechanically linked poles for simultaneous switching.
- Contact position indication window.
- Finger-safe IP20 terminals.
- Compatible with pin and fork type busbars.
- Suitable for standard 35 mm DIN rail mounting.
Reliable Protection for Three-Phase Installations
The IMO B10C4040A combines thermal overload protection with magnetic short-circuit protection to safeguard electrical installations against damaging fault conditions. The thermal element responds to sustained overloads, while the magnetic trip mechanism rapidly disconnects severe fault currents before damage occurs.
Its C curve operating characteristic allows normal temporary starting currents from inductive equipment without unnecessary tripping. This makes it suitable for industrial machinery, motor circuits, HVAC systems, compressors, pumps and automation equipment that experience moderate inrush currents during start-up.
The mechanically linked four-pole construction disconnects all conductors simultaneously during manual switching or fault conditions, improving safety and providing complete isolation for three-phase electrical systems.
Typical Applications
- Industrial control panels.
- Three-phase distribution boards.
- Motor protection circuits.
- HVAC systems.
- Pump and compressor installations.
- Automation and process control equipment.
- Commercial electrical installations.
- OEM machinery and manufacturing systems.
Technical Specifications
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| Current | 40 A | |
|---|---|---|
| Phase | Three Phase | |
| Poles | 4-pole | |
| Device Type | MCB | |
| Trip Curve | C curve | |
| Breaking Capacity | 10 kA | |
| Manufacturer | IMO Precision Controls | |
| Series | B10 Miniature Circuit Breakers | |
| Model | B10C4040A | |
| Product type | Miniature circuit breaker | |
| Rated current | 40 A | |
| Number of poles | 4 | |
| Trip characteristic | C Curve | |
| Instantaneous tripping range | 5 to 10 × rated current | |
| Rated voltage | 240/415 V AC | |
| Maximum DC voltage | 60 V DC | |
| Frequency | 50/60 Hz | |
| Breaking capacity | 10 kA | |
| Rated impulse withstand voltage | 6.2 kV | |
| Energy limiting class | Class 3 | |
| Protection mechanism | Thermal-magnetic | |
| Standard | IEC 60898-1 | |
| Protection degree | IP20 | |
| Terminal capacity | Up to 35 mm² solid or 25 mm² stranded conductor | |
| Operating temperature | -30°C to +60°C | |
| Mounting type | 35 mm DIN rail (EN 60715) | |
| HS Code | 8536201090 | |
| Country of Manufacture | China |
Frequently Asked Questions
What is the IMO B10C4040A used for?
The IMO B10C4040A protects three-phase electrical circuits against overloads and short circuits in industrial, commercial and OEM installations.
What current rating does the B10C4040A have?
The breaker has a 40 A rated current.
What does the C curve characteristic mean?
A C curve miniature circuit breaker is designed for circuits with moderate inrush currents, making it suitable for motors, transformers, compressors, pumps and other inductive electrical equipment.
How many poles does this circuit breaker have?
The B10C4040A has a four-pole configuration, allowing simultaneous protection and isolation of all conductors in a three-phase system.
What is the short-circuit breaking capacity?
The breaker provides a 10 kA breaking capacity in accordance with IEC 60898-1.
How is the B10C4040A installed?
The breaker is designed for installation on a standard 35 mm DIN rail inside electrical distribution boards, switchboards and industrial control panels.
Trusted by Electrical Professionals
IMO B10 miniature circuit breakers are trusted by electrical contractors, panel builders and automation engineers for dependable circuit protection, robust construction and reliable long-term performance in demanding industrial and commercial applications.
