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2CSS255101R0405 ABB SN201-B40 Miniature Circuit Breaker 40 A 1P+N Type B
ABB SN201-B40 is a compact 40 A 1P+N Type B miniature circuit breaker with switched neutral and a 6 kA rated short-circuit capacity for residential and commercial circuit protection.
£17.57
Why Choose the ABB SN201-B40 Miniature Circuit Breaker?
The ABB SN201-B40 is a compact and reliable 1P+N miniature circuit breaker (MCB) designed to protect electrical circuits against overload and short-circuit conditions while also switching the neutral conductor. As part of the ABB System pro M compact SN201 range, it combines phase protection and switched-neutral functionality within a space-saving single-module design.
This miniature circuit breaker uses a Type B tripping characteristic, making it suitable for residential and commercial circuits with relatively low starting or inrush currents. The SN201-B40 provides dependable protection for resistive loads, general-purpose distribution circuits and other applications requiring sensitive magnetic operation.
With a rated current of 40 A, a rated operational voltage of 230 V AC and a rated short-circuit capacity of 6 kA to IEC/EN 60898-1, the SN201-B40 provides substantial circuit capacity in a compact format. Its single-module construction helps conserve valuable space in consumer units and distribution boards while providing phase protection together with neutral switching.
Key Advantages
- Compact 1P+N miniature circuit breaker with switched neutral.
- 40 A rated current for higher-current branch and final circuits.
- Type B tripping characteristic suitable for circuits with relatively low inrush currents.
- 6 kA rated short-circuit capacity to IEC/EN 60898-1.
- Single-module construction helps maximise available distribution-board space.
- Combines phase protection and neutral switching in one compact device.
Key Features
- ABB System pro M compact SN201 series.
- 40 A rated current.
- 230 V AC rated operational voltage.
- 1P+N configuration with one protected pole.
- Type B tripping characteristic.
- 6 kA rated short-circuit capacity.
- Protection against overload and short-circuit currents.
- Compact 18 mm single-module design.
- IP20 degree of protection.
- DIN rail mounting for modular electrical installations.
Space-Saving Circuit Protection with Switched Neutral
The ABB SN201 range combines overcurrent protection of the phase conductor with neutral switching in a compact 1P+N format. This arrangement provides overload and short-circuit protection while allowing the neutral conductor to be switched together with the protected phase, making the range particularly useful in space-conscious residential and commercial distribution systems.
The Type B characteristic makes the SN201-B40 particularly suitable for circuits with comparatively low normal inrush currents. Combined with its 40 A current rating and compact 18 mm width, it provides an efficient solution for higher-current circuits where dependable protection and economical use of panel space are required.
Typical Applications
- Residential electrical distribution boards.
- Commercial electrical installations.
- Higher-current branch and final circuits.
- Resistive and general-purpose electrical loads.
- Consumer units and modular distribution equipment.
- Space-constrained electrical panels requiring 1P+N protection.
Technical Specifications
| Series | System pro M compact SN201 |
|---|---|
| ABB order code | 2CSS255101R0405 |
| Product type | Miniature circuit breaker (MCB) |
| Rated current | 40 A |
| Rated operational voltage | 230 V AC |
| Pole configuration | 1P+N |
| Number of protected poles | 1 |
| Neutral | Switched neutral |
| Tripping characteristic | Type B |
| Rated short-circuit capacity (Icn) | 6 kA |
| Ultimate short-circuit breaking capacity (Icu) | 10 kA at 230 V AC |
| Rated frequency | 50/60 Hz |
| Rated insulation voltage (Ui) | 500 V |
| Rated impulse withstand voltage (Uimp) | 4 kV |
| Degree of protection | IP20 |
| Operating temperature | -25 to +55 °C |
| Dimensions (H × W × D) | 85 × 18 × 69 mm |
| Weight | approx. 0.110 kg |
| Standard | IEC/EN 60898-1 |
| Mounting type | DIN rail |
Frequently Asked Questions
What is the ABB SN201-B40 used for?
The ABB SN201-B40 is a compact miniature circuit breaker designed to protect residential and commercial electrical circuits against overload and short-circuit conditions while also providing switched-neutral functionality.
What is the current rating of the SN201-B40?
The SN201-B40 has a rated current of 40 A and uses a compact 1P+N configuration with one protected pole.
What does the Type B characteristic mean?
The Type B tripping characteristic is suited to circuits with relatively low starting or inrush currents, including many resistive and general-purpose electrical loads.
What is the breaking capacity of the ABB SN201-B40?
The SN201-B40 has a rated short-circuit capacity (Icn) of 6 kA to IEC/EN 60898-1 and an ultimate short-circuit breaking capacity (Icu) of 10 kA at 230 V AC.
What is the advantage of the 1P+N design?
The 1P+N configuration combines protection of the phase conductor with switching of the neutral conductor in a compact 18 mm-wide device, helping conserve space in consumer units and distribution boards.
Trusted ABB Circuit Protection
ABB System pro M compact SN201 miniature circuit breakers combine dependable overload and short-circuit protection with switched-neutral functionality in a space-saving modular format for residential and commercial electrical distribution.
