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2CCS571103R8405 ABB S401M-B40NP MCB 10kA 1P+NP Type B 40A
ABB S401M-B40NP is a 40 A 1P+NP Type B miniature circuit breaker with protected neutral and 10 kA breaking capacity for reliable overload and short-circuit protection in SMISSLINE TP plug-in distribution systems.
£62.22
Why Choose the ABB S401M-B40NP Miniature Circuit Breaker?
The ABB S401M-B40NP is a pluggable 1P+NP miniature circuit breaker (MCB) with protected neutral designed to provide reliable overload and short-circuit protection in electrical distribution systems. As part of the ABB S400M SMISSLINE TP series, it combines dependable circuit protection with the installation flexibility of ABB's modular plug-in distribution system.
This circuit breaker has a rated current of 40 A, a Type B tripping characteristic and a rated short-circuit breaking capacity of 10 kA. It is designed in accordance with IEC/EN 60898-1 and has a rated voltage of 230 V AC, making it suitable for professional low-voltage distribution applications requiring a Type B protection characteristic.
The S401M-B40NP uses an L+N configuration with protected neutral, with the neutral protected at 100% of the nominal value of the pole conductor. Its compact 2-module SMISSLINE TP format supports efficient installation, maintenance and circuit modification in compatible ABB plug-in distribution assemblies.
Key Advantages
- Pluggable 1P+NP miniature circuit breaker with protected neutral.
- 40 A rated current for branch and final circuit protection.
- Type B tripping characteristic for circuits with relatively low inrush currents.
- 10 kA rated short-circuit breaking capacity.
- Neutral conductor is protected at 100% of the nominal value of the pole conductor.
- Compact 2-module format for efficient use of distribution-board space.
- Plug-in construction for integration with the ABB SMISSLINE TP system.
Key Features
- ABB S400M SMISSLINE TP miniature circuit breaker series.
- 40 A rated current.
- Type B characteristic.
- 1P+NP / L+N configuration with protected neutral.
- 230 V AC rated voltage.
- 10 kA Icn short-circuit breaking capacity.
- 440 V rated insulation voltage.
- 4 kV rated impulse withstand voltage.
- IP20 degree of protection.
- 2-module SMISSLINE TP plug-in format.
Reliable Protection for Low-Inrush Electrical Circuits
Miniature circuit breakers such as the ABB S401M-B40NP protect electrical conductors and connected equipment by automatically interrupting excessive currents caused by overload or short-circuit conditions. This helps prevent damage to wiring and equipment while providing a resettable alternative to traditional fuse protection.
The Type B characteristic is suited to circuits where relatively low short-duration inrush currents are expected. Combined with the protected-neutral arrangement and ABB's SMISSLINE TP plug-in architecture, the S401M-B40NP provides dependable protection in a modular format designed for efficient professional power distribution.
Typical Applications
- Commercial electrical distribution systems.
- Industrial low-voltage distribution boards.
- Building-services electrical installations.
- General-purpose branch and final circuits.
- Lighting and resistive-load circuits where Type B protection is appropriate.
- Control and auxiliary power circuits.
- ABB SMISSLINE TP plug-in distribution assemblies.
Technical Specifications
| Product group | SMISSLINE Plug-in System |
|---|---|
| Series | S400M / SMISSLINE TP |
| ABB order code | 2CCS571103R8405 |
| EAN | 7612270103386 |
| Product type | Miniature circuit breaker (MCB) |
| Rated current | 40 A |
| Tripping characteristic | Type B |
| Configuration | 1P+NP / L+N with protected neutral |
| Rated voltage | 230 V AC |
| Rated operational voltage according to IEC 60898-1 | 240 V AC |
| Rated insulation voltage (Ui) | 440 V |
| Rated impulse withstand voltage (Uimp) | 4 kV |
| Rated short-circuit breaking capacity (Icn) | 10 kA |
| Standard | IEC/EN 60898-1 |
| Protection rating | IP20 |
| Number of modules | 2 |
| Mounting type | SMISSLINE TP plug-in |
| Height | 91 mm |
| Depth | 82 mm |
| Weight | approx. 221 g |
| Packaging unit | 5 pieces |
Frequently Asked Questions
What is the ABB S401M-B40NP used for?
The S401M-B40NP is a miniature circuit breaker designed to protect electrical circuits against overload and short-circuit currents in compatible ABB SMISSLINE TP distribution systems.
What is the rated current of the S401M-B40NP?
The ABB S401M-B40NP has a rated current of 40 A.
What does the Type B characteristic mean?
The Type B tripping characteristic is intended for circuits with relatively low inrush currents while providing dependable overload and short-circuit protection.
What is the breaking capacity of the S401M-B40NP?
The S401M-B40NP has a rated short-circuit breaking capacity of 10 kA and is designed in accordance with IEC/EN 60898-1.
Is the neutral conductor protected by the S401M-B40NP?
Yes. The S401M-B40NP has a protected neutral, with the neutral protected at 100% of the nominal value of the pole conductor.
Trusted ABB Protection for Professional Distribution Systems
ABB SMISSLINE TP S400M miniature circuit breakers combine dependable overload and short-circuit protection with a flexible plug-in architecture for efficient professional low-voltage power distribution.
