ABB KSF440TPSN four-pole 40 A fireman switch with IP65 aluminium enclosure for emergency electrical isolation in commercial and industrial installations.
£176.28
The ABB 2CMA142439R1000, also known as the KSF440TPSN, is a heavy-duty four-pole fireman switch designed to provide rapid and reliable electrical isolation during emergency situations. It is specifically developed for disconnecting power to illuminated signs, commercial buildings, industrial equipment and other installations where emergency services require safe access to electrical systems.
Manufactured as part of the ABB KSF fireman switch range, the KSF440TPSN features a durable aluminium enclosure with a highly visible red finish and a side-operated handle designed for use with a fireman's hook. Its robust construction and IP65 protection rating make it suitable for demanding indoor and outdoor installations exposed to dust and water.
With a rated operational current of 40 A and an operational voltage of up to 690 V AC, this four-pole switch provides dependable isolation for three-phase systems including the neutral conductor. Its padlockable operating handle and interlocked cover help improve safety during maintenance and emergency isolation procedures.
Fireman switches provide emergency services with a safe and convenient means of disconnecting electrical supplies before firefighting or rescue operations begin. The ABB KSF440TPSN isolates all four conductors simultaneously, making it particularly suitable for three-phase systems where complete isolation, including the neutral conductor, is required.
Its durable aluminium enclosure, UV-resistant finish and IP65 ingress protection ensure dependable operation in exposed outdoor environments, while the interlocked cover and padlockable handle provide additional safety during servicing and maintenance.
| Power | 11 kW |
|---|---|
| Current | 40 A |
| Phase | Three Phase |
| IP Rating | IP65 |
| Manufacturer | ABB |
| Series | KSF |
| Model | KSF440TPSN |
| Product ID | 2CMA142439R1000 |
| Product type | Enclosed fireman switch / switch disconnector |
| Number of poles | 4 |
| Rated operational current | 40 A |
| Maximum operational voltage | 690 V AC |
| Switching power | approx. 15 kW |
| Electrical phase | Three phase with switched neutral |
| Protection rating | IP65 |
| Enclosure material | Aluminium alloy |
| Enclosure colour | Red |
| Terminal type | Screw clamp cable terminals |
| Cable entries | 2 × M32 (top), 2 × M32 + 1 × M16 (bottom) |
| Handle type | Side-operated fireman handle |
| Padlock compatibility | Yes |
| Installation | Surface mounting |
| Dimensions (H × W × D) | approx. 168 × 136 × 68 mm |
| Weight | approx. 0.83 kg |
| Standard | IEC 60947-3 |
| EAN | 7392696424394 |
The ABB KSF440TPSN is a four-pole fireman switch used to safely disconnect electrical power during emergencies or maintenance.
The switch has a rated operational current of 40 A.
The KSF440TPSN is designed for systems operating up to 690 V AC.
Yes. Its IP65-rated aluminium enclosure provides protection against dust and water, making it suitable for indoor and outdoor installations.
The four-pole design isolates all three phase conductors together with the neutral conductor, providing complete electrical isolation where required.
ABB KSF fireman switches are widely specified for commercial and industrial installations where dependable emergency isolation, robust construction and long-term reliability are essential.
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2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...