Mersen 83120003 Surge-Trap SP12-12K320V replacement cartridge for Type 1+2 surge protection devices featuring 12.5 kA lightning impulse current and 320 V maximum continuous operating voltage.
Original price was: £70.52.£56.42Current price is: £56.42.
The Mersen 83120003 is a high-performance Surge-Trap pluggable surge protection cartridge designed for use with compatible Mersen Type 1+2 surge protective devices. It provides reliable protection against transient overvoltages caused by lightning strikes and switching surges in industrial, commercial and electrical distribution systems.
Also identified as SP12-12K320V, this replacement cartridge forms part of the Mersen STP T12 12.5 surge protection range. It is designed for Type 1+2 / Class I+II surge protection and features a 12.5 kA lightning impulse current rating, making it suitable for the first stage of protection in incoming power supply panels and installations with external lightning protection systems.
With a 320 V maximum continuous operating voltage, pluggable construction and mechanically coded cartridge design, the Mersen 83120003 allows quick replacement while helping prevent installation errors and reducing maintenance downtime.
Replacement surge cartridges such as the Mersen 83120003 help maintain the effectiveness of surge protective devices after they have absorbed transient overvoltages. Replacing a worn cartridge restores protection without replacing the complete surge protection assembly.
Designed for Type 1+2 protection, the SP12-12K320V is commonly installed as the first stage of surge protection in incoming power distribution systems where there is exposure to lightning currents or switching surges.
| Voltage | 320 V |
|---|---|
| Phase | Single Phase |
| Manufacturer | Mersen |
| Series | Surge-Trap STP T12 12.5 |
| Model | SP12-12K320V |
| SKU | 83120003 |
| Product type | Surge protection replacement cartridge |
| SPD type | Type 1+2 / Class I+II |
| Maximum continuous operating voltage (Uc) | 320 V AC |
| Nominal operating voltage (Un) | 277 V AC |
| Lightning impulse current (Iimp) | 12.5 kA |
| Maximum discharge current (Imax) | 50 kA |
| Nominal discharge current (In) | 20 kA |
| Voltage protection level (Up) | 1.4 kV |
| Number of poles | 1 pole cartridge |
| Protection rating | IP20 |
| Mounting type | Pluggable replacement cartridge |
| Standards | IEC/EN 61643-11 |
| Weight | Approx. 0.111 kg |
The Mersen 83120003 is a replacement cartridge for compatible Mersen Surge-Trap Type 1+2 surge protective devices.
The model reference is SP12-12K320V.
It provides Type 1+2 / Class I+II surge protection for low-voltage power distribution systems.
The cartridge has a maximum continuous operating voltage of 320 V AC.
It is installed in compatible Mersen Surge-Trap pluggable surge protection devices fitted within electrical distribution boards and control panels.
Mersen Surge-Trap surge protection products are trusted by electrical engineers, panel builders and facilities teams to help protect critical electrical systems from lightning currents 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...
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...