Mersen STPT2-40K275V-3PM Type 2 surge protection device with 40 kA Imax, 230 / 400 V AC nominal operating voltage, 275 V AC maximum continuous operating voltage, 3+0 TNC configuration, pluggable DIN rail design and remote indication.
Original price was: £112.25.£89.80Current price is: £89.80.
The Mersen STPT2-40K275V-3PM (Part Number 83020135) is a high-performance Type 2 surge protection device (SPD) designed to protect low-voltage electrical installations against transient overvoltages caused by lightning activity and electrical switching events. As part of the Mersen Surge-Trap® Pluggable STPT2 Series, it provides reliable surge protection for industrial, commercial and infrastructure electrical systems.
Featuring a 40 kA maximum discharge current (Imax), 275 V AC maximum continuous operating voltage (Uc), pluggable modular construction and remote indication, this SPD supports straightforward installation, fast replacement and external monitoring of protection status.
Designed for three-phase 400 V AC systems with a 3+0 TNC configuration, the STPT2-40K275V-3PM is well suited to protecting automation equipment, machine control panels, commercial switchboards, building services and critical low-voltage electrical installations.
Type 2 surge protection devices are installed within electrical distribution systems to help limit transient overvoltages before they reach sensitive connected equipment. This helps reduce equipment damage, minimise downtime and improve the reliability of critical electrical systems.
The Mersen STPT2 pluggable range combines high discharge capability with replaceable cartridges, clear device status indication and remote monitoring, making it suitable for preventative maintenance in control panels, low-voltage switchgear and commercial distribution boards.
| Voltage | 400 V |
|---|---|
| Phase | Three Phase |
| Manufacturer | Mersen |
| Series | Surge-Trap® Pluggable STPT2 Series - 40kA |
| Model | STPT2-40K275V-3PM |
| Item number | 83020135 |
| Product type | Surge protection device |
| SPD type | Type 2 / Class II |
| UL SPD type | Type 2 Component Assembly |
| Maximum discharge current | 40 kA Imax (8/20 μs) |
| Nominal discharge current | 20 kA In (8/20 μs) |
| Nominal operating voltage | 230 / 400 V AC |
| Maximum continuous operating voltage | 275 V AC |
| System configuration | 3+0 TNC |
| Number of poles | 3 poles |
| Module width | 3 modules |
| Format | Pluggable |
| Remote indication | Yes |
| Mounting type | DIN rail |
| Protection rating | IP20 |
| Short circuit withstand | 25 kA |
| Maximum back-up fuse | 125 A gG |
| RoHS compliant | Yes |
| EAN / UPC | 8435297849216 |
| HS Code | 85363090 |
| Country of Manufacture | Spain |
It is used to protect three-phase low-voltage electrical installations and connected equipment against transient overvoltages caused by lightning activity and switching events.
The STPT2-40K275V-3PM is a Type 2 / Class II surge protection device for electrical distribution and control systems.
This SPD has a 40 kA Imax maximum discharge current rating using an 8/20 μs waveform.
Yes. The STPT2-40K275V-3PM includes remote indication, allowing the device status to be monitored through external signalling or control systems.
It is designed for 230 / 400 V AC systems with a 275 V AC maximum continuous operating voltage.
Mersen Surge-Trap® surge protection devices are trusted by panel builders, electrical contractors and maintenance engineers to protect critical low-voltage installations from damaging transient overvoltages.
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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...