Mersen STPT12-25K275V-2PGM Type 1+2 surge protection device with 25 kA lightning impulse current, remote indication and pluggable modules for 230 V AC TT electrical systems.
Original price was: £278.24.£205.62Current price is: £205.62.
The Mersen 83120155 STPT12-25K275V-2PGM is a premium Type 1+2 Surge Protection Device (SPD) engineered to protect low-voltage electrical installations against lightning currents and transient overvoltages. Designed for industrial, commercial and infrastructure applications, it provides dependable protection for electrical distribution systems, switchboards and sensitive electronic equipment.
As part of the proven Mersen Surge-Trap® Pluggable STPT12 Series - 25kA, this compact pluggable SPD is designed for installation at the main distribution board as the first stage of surge protection. The integrated remote indication microswitch enables continuous monitoring of the device status, helping reduce maintenance time and maximise system availability.
Designed for 230 V AC single-phase plus neutral (1Ph+N) installations using a 1+1 TT configuration, the STPT12-25K275V-2PGM delivers an impressive 25 kA Iimp (10/350 μs) lightning impulse current rating together with a 100 kA maximum discharge current, providing reliable protection for installations exposed to lightning and switching surges.
Type 1+2 surge protection devices provide the first level of defence against direct lightning currents and transient overvoltages entering an electrical installation. Installing an SPD at the incoming distribution board helps protect downstream equipment, minimise downtime and extend the service life of valuable electrical assets.
The Mersen STPT12 Series is engineered for demanding industrial environments, offering dependable protection for switchboards, automation systems, manufacturing equipment, commercial buildings and critical infrastructure installations.
| Voltage | 230 V |
|---|---|
| Phase | Single Phase |
| Manufacturer | Mersen |
| Series | Surge-Trap® Pluggable STPT12 Series - 25kA |
| Model | STPT12-25K275V-2PGM |
| Part number | 83120155 |
| Product type | Type 1+2 Surge Protection Device |
| IEC classification | Class I+II |
| Nominal operating voltage (Un) | 230 V AC |
| Maximum continuous operating voltage (Uc L-N) | 275 V AC |
| Maximum continuous operating voltage (Uc N-PE) | 255 V AC |
| System configuration | 1Ph+N, 1+1 TT |
| Protection modes | L-N / N-PE |
| Lightning impulse current (Iimp) | 25 kA (10/350 μs) |
| Maximum discharge current (Imax) | 100 kA (8/20 μs) |
| Nominal discharge current (In) | 25 kA (8/20 μs) |
| Short circuit withstand (ISCCR) | 25 kA |
| Number of poles | 2 |
| Number of modules | 4 |
| Mounting type | DIN rail |
| Format | Pluggable |
| Remote indication | Yes |
| Protection rating | IP20 |
| Standards | EN 61643-11 / IEC 61643-11 |
| RoHS compliant | Yes |
| HS Code | 85363090 |
| Country of Manufacture | Spain |
It protects low-voltage electrical installations against lightning currents and transient overvoltages.
It is designed for 230 V AC single-phase plus neutral installations using a 1+1 TT configuration.
Yes. The STPT12-25K275V-2PGM includes an integrated remote indication microswitch for external monitoring of the SPD status.
The device provides a 25 kA Iimp (10/350 μs) lightning impulse current rating.
It is typically installed at the main incoming distribution board as the first stage of surge protection.
Mersen Surge-Trap® surge protection devices are trusted worldwide by electrical engineers and panel builders to deliver reliable protection against lightning currents and transient overvoltages in critical electrical installations.
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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...