ABB 2CMA142438R1000 KSF340TPN three-pole 40 A fireman switch with an IP65 enclosure, padlockable emergency handle and a maximum operational voltage of 690 V AC.
£166.55
The ABB 2CMA142438R1000, also known as the KSF340TPN, is a robust 40 A three-pole fireman switch designed to provide rapid and dependable electrical isolation during a fire or emergency. It is particularly suitable for disconnecting neon signs, illuminated advertising, exterior lighting and other electrical equipment that could present a hazard to emergency personnel.
The fireman switch features a highly visible red enclosure and an operating handle designed for use with a fireman’s hook stick. Its rigid metal construction and UV-protected finish provide reliable performance in demanding commercial and industrial environments, while the IP65 enclosure protection makes it suitable for both indoor and outdoor installation.
With a rated switching current of 40 A and an operational voltage of up to 690 V AC, the ABB KSF340TPN provides secure isolation for three-phase electrical systems. The switch also includes a fixed neutral terminal and protective earth terminal, making it suitable for five-wire installations where only the three phase conductors require switching.
Fireman switches are installed in accessible exterior or entrance locations so emergency personnel can quickly disconnect potentially hazardous electrical equipment during a fire. The ABB KSF340TPN provides a clearly identifiable and mechanically reliable means of isolating three-phase circuits without requiring access to the building’s main distribution board.
The operating handle is designed to remain securely in the off position once activated, helping reduce the risk of the circuit being unintentionally re-energised. Its durable enclosure, UV-resistant coating and IP65 protection make the switch well suited to exposed locations on commercial, retail and industrial buildings.
| Power | 11 kW |
|---|---|
| Current | 40 A |
| Phase | Three Phase |
| IP Rating | IP65 |
| Manufacturer | ABB |
| Series | KSF |
| Model | KSF340TPN |
| Product ID | 2CMA142438R1000 |
| Product type | Enclosed fireman switch / switch disconnector |
| Number of switched poles | 3 |
| System type | Five-wire system with fixed neutral and PE terminals |
| Rated switching current | 40 A |
| Maximum operational voltage | 690 V AC |
| Switching power | approx. 15 kW |
| Electrical phase | Three phase |
| Protection rating | IP65 |
| Enclosure material | Rigid metal alloy |
| Enclosure colour | Red |
| Handle type | Side-operated fireman handle |
| Padlock compatibility | Yes, one padlock |
| Terminal type | Cable terminals |
| Internal terminal capacity | up to 4 mm² |
| Top cable entries | 2 × M25 |
| Bottom cable entries | 2 × M25 and 1 × M16 |
| Installation | Surface / wall mounting |
| Dimensions (H × W × D) | approx. 168 × 138 × 68 mm |
| Standard | IEC 60947-3 |
| EAN | 7392696424387 |
The ABB 2CMA142438R1000 is a fireman switch used to disconnect electrical power to equipment such as neon signs, illuminated advertising and exterior lighting during a fire or emergency.
The ABB KSF340TPN has a rated switching current of 40 A and can be used with operational voltages up to 690 V AC.
Yes. The enclosure has an IP65 protection rating and a UV-protected finish, making it suitable for properly installed indoor and outdoor applications.
No. The unit switches the three phase conductors and includes a fixed neutral terminal and a protective earth terminal for use in five-wire electrical systems.
Yes. The handle is designed to accept one padlock, helping prevent unauthorised operation or accidental re-energisation.
The external handle is designed so emergency personnel can operate it using a fireman’s hook stick, allowing the connected circuit to be isolated quickly from a safe position.
ABB KSF fireman switches provide visible, accessible and dependable electrical isolation for commercial and industrial buildings where emergency services may need to disconnect hazardous electrical equipment quickly.
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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...