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Mersen Surge Protector Type 1+2 SPD 2 Pole 230 Volt 25KA TT Remote Indication
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.
£208.68
Why Choose the Mersen STPT12-25K275V-2PGM Surge Protection Device?
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.
Key Advantages
- Combined Type 1+2 surge protection for lightning currents and transient overvoltages.
- 25 kA Iimp (10/350 μs) lightning impulse current capability.
- Designed for 230 V AC single-phase plus neutral TT systems.
- 1+1 TT configuration with L-N and N-PE protection.
- Integrated remote indication microswitch for status monitoring.
- Pluggable modules allow rapid replacement and reduced downtime.
- DIN rail mounting for quick installation.
Key Features
- Mersen Surge-Trap® Pluggable STPT12 Series - 25kA.
- Type 1+2 / Class I+II surge protection device.
- 25 kA Iimp (10/350 μs) lightning impulse current.
- 100 kA Imax (8/20 μs) maximum discharge current.
- 25 kA In (8/20 μs) nominal discharge current.
- 230 V AC nominal operating voltage.
- 275 V Uc (L-N) and 255 V Uc (N-PE).
- 2-pole, 4-module pluggable construction with remote indication.
Reliable Protection Against Lightning and Voltage 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.
Typical Applications
- Main electrical distribution boards.
- Single-phase TT electrical systems.
- Industrial control panels.
- Commercial buildings.
- Automation and machinery installations.
- Telecommunications and IT facilities.
- Infrastructure and utility installations.
Technical Specifications
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| Impulse Current Iimp (kA) | 25 kA | |
|---|---|---|
| Voltage | 230 V | |
| Phase | Single Phase | |
| Poles | 2-pole | |
| Device Type | Surge protection device | |
| SPD Type | Type 1+2 | |
| Earthing System | TN-S, TT | |
| Nominal Discharge Current (In) | 25 kA | |
| Remote Signal | Yes | |
| 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 | TN-S, 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 |
Frequently Asked Questions
What is the Mersen 83120155 used for?
It protects low-voltage electrical installations against lightning currents and transient overvoltages.
What electrical system is this device designed for?
It is designed for 230 V AC single-phase plus neutral installations using a 1+1 TT configuration.
Does this version include remote indication?
Yes. The STPT12-25K275V-2PGM includes an integrated remote indication microswitch for external monitoring of the SPD status.
What is the lightning impulse current rating?
The device provides a 25 kA Iimp (10/350 μs) lightning impulse current rating.
Where should this surge protection device be installed?
It is typically installed at the main incoming distribution board as the first stage of surge protection.
Trusted for Industrial Electrical 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.
