Mersen 83120112 STPT12-12K150V-2PG Type 1+2 surge protection device with 12.5 kA lightning impulse current, 120 V nominal operating voltage, 1Ph+N 1+1 TT configuration, 2-pole pluggable DIN rail design and 2-module format.
Original price was: £164.77.£121.77Current price is: £121.77.
The Mersen 83120112 STPT12-12K150V-2PG is a reliable Type 1+2 surge protection device (SPD) designed to protect low-voltage electrical installations against lightning currents and transient overvoltages. Part of the Mersen Surge-Trap® Pluggable STPT12 Series, it is suitable for incoming supply panels, main distribution boards and installations requiring robust first-level surge protection.
This device provides combined protection for single-phase plus neutral systems, using a 1+1 TT configuration with L-N and N-PE protection modes. Its compact pluggable design makes installation straightforward and allows quick module replacement during maintenance.
With a 12.5 kA lightning impulse current (10/350 μs), 120 V nominal operating voltage (Un) and 150 V L-N maximum continuous operating voltage (Uc), the 83120112 is ideal for protecting sensitive equipment in industrial, commercial and infrastructure electrical systems.
Surge protection devices help protect electrical equipment from voltage spikes caused by lightning activity, switching operations and network disturbances. Installing a Type 1+2 SPD at the incoming supply point helps reduce the risk of equipment damage, downtime and disruption to critical electrical systems.
The Mersen STPT12 Series is engineered for low-voltage distribution applications where dependable surge protection and simple maintenance are required. The pluggable module format allows quick replacement without rewiring the complete assembly.
| Voltage | 120 V |
|---|---|
| Manufacturer | Mersen |
| Series | Surge-Trap® Pluggable STPT12 |
| Model | STPT12-12K150V-2PG |
| Part number | 83120112 |
| Product type | Type 1+2 Surge Protection Device |
| IEC classification | Class I+II |
| Lightning impulse current (Iimp 10/350 μs) | 12.5 kA |
| Maximum discharge current (Imax 8/20 μs) | 50 kA |
| Nominal discharge current (In 8/20 μs) | 20 kA |
| Nominal operating voltage (Un) | 120 V AC |
| Maximum continuous operating voltage L-N (Uc) | 150 V AC |
| Maximum continuous operating voltage N-PE (Uc) | 255 V AC |
| Protection modes | L-N / N-PE |
| System configuration | 1+1 TT, TNS |
| Number of poles | 2 |
| Module width | 2 modules |
| Mounting type | DIN rail |
| Format | Pluggable |
| HS Code | 85363090 |
| Country of Manufacture | Spain |
It is used to protect single-phase plus neutral low-voltage electrical installations from lightning currents and transient overvoltages.
The 83120112 is a Type 1+2 (Class I+II) surge protection device for combined lightning current and surge protection.
It has a 120 V AC nominal operating voltage and a 150 V AC maximum continuous operating voltage L-N.
The Mersen 83120112 is designed for 1+1 TT configurations and is suitable for TT and TNS low-voltage systems.
It is typically installed on a DIN rail in main distribution boards or incoming supply panels as the first level of surge protection.
Mersen Surge-Trap® surge protection devices are trusted worldwide to help protect electrical installations, industrial equipment and critical infrastructure from the damaging effects of lightning strikes and 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...