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2CDA384799R0401 ABB M304P-D40 Magnetic Circuit Breaker 25 kA 4P 40 A
ABB M304P-D40 is a 40 A four-pole D-characteristic magnetic-only circuit breaker with 25 kA breaking capacity, designed for reliable short-circuit protection in demanding industrial electrical circuits.
£166.57
Why Choose the ABB M304P-D40 Magnetic Circuit Breaker?
The ABB M304P-D40 is a high-performance four-pole magnetic-only miniature circuit breaker (MCB) designed to provide reliable short-circuit protection in demanding industrial electrical installations. As part of the ABB M300P / S300P circuit breaker range, it is engineered for applications where dedicated instantaneous magnetic protection is required without an integrated thermal overload function.
This breaker combines a 40 A rated current with D-characteristic magnetic operation, making it particularly suitable for circuits and equipment subject to elevated starting or inrush currents. Its four-pole configuration enables simultaneous switching and protection across four conductors, while the modular design supports straightforward integration into industrial distribution boards and control panels.
With a 25 kA short-circuit breaking capacity, the M304P-D40 is designed for electrical systems where substantial prospective fault currents may occur. Its robust construction and magnetic operating principle provide rapid response to severe overcurrent and short-circuit conditions, supporting dependable circuit protection in industrial machinery, automation and power distribution applications.
Key Advantages
- Dedicated magnetic-only short-circuit protection for demanding electrical circuits.
- 40 A rated current with a four-pole configuration.
- 25 kA short-circuit breaking capacity for high fault-level installations.
- D-characteristic magnetic operation accommodates circuits with elevated starting and inrush currents.
- Four-pole construction supports coordinated switching and protection of multi-conductor circuits.
- Compact modular design simplifies installation in electrical distribution and control equipment.
Key Features
- ABB M300P / S300P magnetic circuit breaker range.
- 40 A rated current.
- 4-pole configuration.
- D tripping characteristic.
- Magnetic-only operating principle for short-circuit protection.
- 25 kA short-circuit breaking capacity.
- Designed for circuits with high transient and inrush currents.
- Modular construction for installation in distribution boards and control panels.
Reliable Magnetic Protection for Industrial Circuits
Magnetic-only circuit breakers such as the ABB M304P-D40 are designed to respond rapidly to high fault currents and short circuits. Unlike conventional thermal-magnetic MCBs, their protective operation is based on magnetic tripping, making them particularly useful where overload protection is provided separately or where dedicated short-circuit protection is required.
The ABB M300P / S300P range provides robust circuit protection for industrial electrical systems. The four-pole M304P-D40 combines high breaking capacity with D-characteristic operation, making it suitable for equipment and circuits that can experience substantial temporary inrush currents during normal operation.
Typical Applications
- Three-phase electrical systems requiring four-pole switching and protection.
- Industrial control panels and distribution boards.
- Motor and machinery circuits with separate overload protection.
- Circuits subject to high starting or inrush currents.
- Industrial machinery and automation equipment.
- Commercial and industrial power distribution installations.
Technical Specifications
| Series | M300P / S300P |
|---|---|
| ABB order code | 2CDA384799R0401 |
| Product type | Magnetic-only miniature circuit breaker |
| Rated current | 40 A |
| Number of poles | 4 |
| Tripping characteristic | D |
| Short-circuit breaking capacity | 25 kA |
| Protection principle | Magnetic |
| Mounting type | DIN rail / modular installation |
| Application | Industrial circuit and short-circuit protection |
Frequently Asked Questions
What is the ABB M304P-D40 used for?
The ABB M304P-D40 is a four-pole magnetic-only circuit breaker designed primarily for short-circuit protection and circuit control in demanding industrial electrical installations.
What is the rated current of the M304P-D40?
The M304P-D40 has a rated current of 40 A.
What is the breaking capacity of this circuit breaker?
The M304P-D40 provides a 25 kA short-circuit breaking capacity, making it suitable for electrical installations where high prospective fault currents may occur.
Does the M304P-D40 provide thermal overload protection?
No. The M304P-D40 is a magnetic-only circuit breaker intended primarily for short-circuit protection. Where overload protection is required, it should be provided by an appropriate separate protective device.
How many poles does the ABB M304P-D40 have?
The M304P-D40 has a four-pole configuration, allowing coordinated switching and protection across four conductors.
Trusted ABB Circuit Protection
ABB M300P / S300P magnetic circuit breakers provide dependable high-performance short-circuit protection for industrial electrical installations, combining compact modular construction with high breaking capacity and reliable magnetic operation.
