Mersen 83120005 SP12-25K-N Type 1+2 neutral surge protection replacement cartridge with 25 kA impulse current rating, 25 kA nominal discharge current and 255 V maximum continuous operating voltage.
£71.69
The Mersen 83120005, also known as SP12-25K-N, is a robust Type 1+2 surge protection replacement cartridge designed for compatible Mersen Surge-Trap surge protection devices. It is used to help protect electrical installations from lightning currents and transient overvoltages in industrial, commercial and power distribution environments.
As part of the Mersen STP T12 25 Surge-Trap series, this replaceable neutral cartridge is engineered for installations requiring high-performance surge protection at the incoming power supply. Its plug-in format allows quick cartridge replacement during maintenance, helping reduce downtime while keeping the surge protection system operational.
With a 25 kA impulse current rating, 25 kA nominal discharge current and 255 V maximum continuous operating voltage, the Mersen 83120005 is suitable for demanding Type 1+2 surge protection applications where neutral line protection is required.
Surge protection devices help protect electrical installations from transient overvoltages caused by lightning activity, switching operations and network disturbances. Type 1+2 SPDs are commonly installed at the origin of an electrical installation, particularly where external lightning protection or high exposure to surge events is present.
The Mersen 83120005 replacement cartridge allows maintenance teams to restore surge protection functionality without replacing the complete SPD assembly. This makes it a practical solution for panel builders, electrical contractors and facilities teams responsible for keeping critical power distribution systems protected.
| Phase | Single Phase |
|---|---|
| Manufacturer | Mersen |
| Series | Surge-Trap STP T12 25 |
| Model | SP12-25K-N |
| Manufacturer part number | 83120005 |
| Product type | Surge protection replacement cartridge |
| Surge protection type | Type 1+2 / Class I+II |
| Configuration | Neutral cartridge |
| Number of poles | 1 pole |
| Maximum continuous operating voltage | 255 V AC |
| Impulse current | 25 kA |
| Nominal discharge current | 25 kA |
| Maximum discharge current | 100 kA |
| Protection rating | IP20 |
| Format | Plug-in replaceable cartridge |
The Mersen 83120005 is a neutral replacement cartridge for compatible Mersen Type 1+2 Surge-Trap surge protection devices used in electrical distribution systems.
The alternative product code for Mersen 83120005 is SP12-25K-N.
This cartridge has a 255 V AC maximum continuous operating voltage.
The Mersen 83120005 is a Type 1+2 / Class I+II surge protection replacement cartridge.
It is typically used in incoming power supply panels, distribution boards and compatible Mersen Surge-Trap assemblies where neutral surge protection is required.
Mersen Surge-Trap devices are widely used by panel builders, electrical contractors and maintenance engineers to protect power distribution systems from damaging transient overvoltages and lightning-related surge events.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
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...