Mersen STPT12-12K150V-4PM Type 1+2 surge protection device with 12.5 kA lightning impulse current rating for 120/208 V AC three-phase plus neutral systems.
Original price was: £395.53.£292.31Current price is: £292.31.
The Mersen 83120143 STPT12-12K150V-4PM is a high-performance Type 1+2 Surge Protection Device (SPD) designed to protect low-voltage electrical installations from lightning currents and transient overvoltages. Engineered for industrial, commercial and infrastructure applications, it provides reliable protection for sensitive equipment and electrical distribution systems.
Part of the trusted Mersen Surge-Trap® STPT12 Series, this pluggable surge protection device combines lightning current discharge capability with transient overvoltage protection in a compact DIN rail mounted design. Its remote indication feature enables easy status monitoring and simplifies maintenance within electrical control panels.
Designed for 120/208 V AC three-phase + neutral (3Ph+N) systems with a 4+0 TNS configuration, the 83120143 offers a 12.5 kA Iimp (10/350 μs) lightning impulse current rating per pole, making it ideal for incoming distribution boards where reliable first-stage surge protection is essential.
Surge protection devices help safeguard electrical installations from damage caused by lightning strikes and switching transients. Installing a Type 1+2 SPD at the incoming distribution board significantly reduces the risk of equipment failure, downtime and costly repairs.
The Mersen STPT12 series is engineered for demanding industrial environments, offering dependable protection for control systems, automation equipment, switchboards and other critical electrical assets.
| Voltage | 208 V |
|---|---|
| Phase | Three Phase |
| Manufacturer | Mersen |
| Series | Surge-Trap® STPT12 |
| Model | STPT12-12K150V-4PM |
| Part number | 83120143 |
| Product type | Type 1+2 Surge Protection Device |
| IEC classification | Class I+II |
| Nominal operating voltage (Un) | 120/208 V AC |
| Maximum continuous operating voltage (Uc) | 150 V AC |
| System configuration | 3Ph+N, 4+0 TNS |
| Lightning impulse current (Iimp) | 12.5 kA (10/350 μs) |
| Maximum discharge current (Imax) | 50 kA (8/20 μs) |
| Number of poles | 4 |
| Mounting type | DIN rail |
| Format | Pluggable |
| Remote indication | Yes |
| RoHS compliant | Yes |
| HS Code | 85363090 |
| Country of Manufacture | Spain |
It is a Type 1+2 surge protection device designed to protect electrical installations against lightning currents and transient overvoltages.
It is typically installed at the incoming electrical distribution board as the primary stage of surge protection.
The device is intended for 120/208 V AC three-phase plus neutral (3Ph+N) TNS electrical systems.
Yes. It includes visual status indication together with a remote indication contact for monitoring and maintenance purposes.
Yes. The pluggable design allows the protection module to be replaced quickly without removing the complete base from the DIN rail.
Mersen Surge-Trap® surge protection devices are trusted by electrical engineers, panel builders and industrial facilities worldwide to provide dependable protection against lightning and transient overvoltages while helping maximise equipment uptime.
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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...