Mersen 83120007 SP12-25K275V Type 1+2 1 pole surge protection device with 25 kA lightning impulse current, 100 kA maximum discharge current and 275 V AC maximum continuous operating voltage.
£121.41
The Mersen 83120007, also known as SP12-25K275V, is a high-performance Type 1+2 surge protection device designed to protect electrical installations from lightning currents and transient overvoltages. It is suitable for use in industrial, commercial and power distribution systems where reliable incoming surge protection is required.
As part of the Mersen Surge-Trap STPT12 25 kA series, this pluggable SPD is engineered for installation at the origin of an electrical system. It helps discharge high-energy surge currents while limiting voltage spikes that could otherwise damage downstream equipment, control panels, automation systems and sensitive electronics.
With a 25 kA lightning impulse current rating, 100 kA maximum discharge current and 275 V AC maximum continuous operating voltage, the Mersen 83120007 is a robust 1 pole Type 1+2 SPD for 230 V networks and coordinated surge protection applications.
Type 1+2 surge protection devices are commonly installed at the incoming supply of an electrical installation to discharge lightning currents and reduce the risk of damaging transient overvoltages. They are especially important for sites with external lightning protection systems or increased exposure to atmospheric surge events.
The Mersen 83120007 supports dependable protection for connected equipment while providing a practical pluggable design for inspection and maintenance. This makes it suitable for panel builders, electrical contractors and facilities teams responsible for protecting critical power distribution infrastructure.
| Voltage | 275 V |
|---|---|
| Phase | Single Phase |
| Manufacturer | Mersen |
| Series | Surge-Trap STPT12 25 |
| Model | SP12-25K275V |
| Manufacturer part number | 83120007 |
| Product type | Surge protection device |
| SPD classification | Type 1+2 / Class I+II |
| Number of poles | 1 pole |
| Nominal voltage | 230 V AC |
| Maximum continuous operating voltage (Uc) | 275 V AC |
| Lightning impulse current (Iimp) | 25 kA |
| Nominal discharge current (In) | 25 kA |
| Maximum discharge current (Imax) | 100 kA |
| Protection rating | IP20 |
| Mounting type | DIN rail |
| Format | Pluggable surge protection device |
The Mersen 83120007 is a Type 1+2 surge protection device used to protect electrical distribution systems from lightning currents and transient overvoltages.
The alternative product code for Mersen 83120007 is SP12-25K275V.
This surge protection device is designed for 230 V AC nominal systems and has a 275 V AC maximum continuous operating voltage.
The Mersen 83120007 provides Type 1+2 / Class I+II surge protection with a 25 kA lightning impulse current rating.
It is typically installed on DIN rail inside incoming distribution boards, industrial switchboards and control panels where coordinated surge protection is required.
Mersen Surge-Trap surge protection devices are widely used by panel builders, electrical contractors and maintenance engineers to protect industrial and commercial electrical installations from lightning-related surge events 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...