ABB KSF425TPSN 4-pole fireman switch with IP65 silumin aluminium enclosure, 25 A AC-22A rating, 16 A AC-23A rating and 7.5 kW motor switching capacity for photovoltaic and emergency isolation applications.
£160.06
The ABB 2CMA142437R1000 is a heavy-duty 4-pole enclosed fireman switch designed to provide safe and dependable isolation of three-phase electrical installations during emergency situations. Part of ABB's trusted KSF fireman switch range, the KSF425TPSN is specifically developed for photovoltaic (PV) systems, commercial buildings and industrial installations where rapid emergency power disconnection is required.
Manufactured from a rigid silumin aluminium enclosure with UV-protected paint, the switch is built to withstand demanding indoor and outdoor environments. The IP65-rated enclosure, interlocked cover and specialist fireman's operating handle provide excellent protection against dust and water ingress while ensuring safe emergency operation. The handle is designed for operation using a fire brigade hook pole and can be padlocked in the OFF position.
Rated at 25 A AC-22A and 16 A AC-23A at 690 V AC with a motor switching capacity of up to 7.5 kW, the ABB KSF425TPSN is suitable for photovoltaic systems, inverter isolation, industrial machinery and commercial electrical installations. It features a switchable neutral terminal, PE terminal and threaded cable entries for straightforward installation.
Fireman switches provide emergency services with a clearly identifiable means of disconnecting electrical power during fire incidents. Their distinctive operating handle allows rapid isolation of electrical installations while helping improve firefighter safety during emergency response.
The ABB KSF425TPSN combines ABB's proven switch-disconnector technology with a rugged aluminium enclosure, making it an excellent solution for renewable energy systems, industrial facilities and commercial buildings requiring dependable emergency electrical isolation.
| Power | 7.5 kW |
|---|---|
| Current | 32 A |
| Phase | Three Phase |
| IP Rating | IP65 |
| Manufacturer | ABB |
| Series | KSF Fireman Switches |
| Model | KSF425TPSN |
| Order number | 2CMA142437R1000 |
| Product type | Enclosed fireman switch |
| Rated current (AC-22A) | 25 A |
| Rated current (AC-23A @ 690 V) | 16 A |
| Motor switching capacity | 7.5 kW |
| Maximum operating voltage | 690 V AC |
| Number of poles | 4 |
| Protection rating | IP65 |
| Enclosure material | Silumin aluminium alloy |
| Cable entries | 2 × M25 top / 2 × M25 bottom |
| Neutral terminal | Switchable |
| Protective earth terminal | Included |
| Terminal type | Screw clamp (0.75–10 mm²) |
| Mounting type | Surface mounting |
| Dimensions (H × W × D) | 130 × 111 × 60 mm |
| Weight | Approx. 0.59 kg |
It provides emergency isolation of four-pole electrical circuits, particularly within photovoltaic systems, commercial buildings and industrial electrical installations.
The ABB KSF425TPSN is a 4-pole enclosed fireman switch designed for three-phase electrical systems with switched neutral.
Yes. The silumin aluminium enclosure is rated IP65 and is suitable for indoor and outdoor use when installed with appropriate compression cable glands.
No. This model is supplied without auxiliary contacts, although it supports the addition of one optional NO auxiliary contact.
It is widely used on photovoltaic systems, renewable energy installations, commercial premises and industrial facilities where reliable emergency isolation is required.
ABB fireman switches are trusted by renewable energy installers, electrical contractors and industrial engineers worldwide for delivering dependable emergency isolation, robust construction and long-term operational reliability.
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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...