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SP12-12K320V Mersen Type 1+2 1P 277V Replacement Cartridge
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.
This product has been discontinued
A direct replacement is available below.
Replacement product
K1-320 Mersen Type 1+2 1P 277V Replacement Cartridge
SKU: 44120003
£57.26 ex VAT
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Why Choose the Mersen 83120003 Surge-Trap Cartridge?
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.
Key Advantages
- Replacement surge protection cartridge for Mersen Surge-Trap devices.
- Type 1+2 / Class I+II protection against lightning currents and transient overvoltages.
- 12.5 kA lightning impulse current rating for dependable protection.
- 320 V maximum continuous operating voltage.
- Pluggable cartridge for quick and straightforward replacement.
- Mechanically coded design helps prevent incorrect installation.
Key Features
- Mersen Surge-Trap STP T12 12.5 series.
- SP12-12K320V replacement cartridge.
- Type 1+2 / Class I+II surge protection.
- 12.5 kA lightning impulse current (10/350 μs).
- 50 kA maximum discharge current (8/20 μs).
- 20 kA nominal discharge current (8/20 μs).
- Optical status indication.
- Compatible with Mersen STP T12 surge protection bases.
Reliable Protection Against Transient Overvoltages
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.
Typical Applications
- Industrial power distribution panels.
- Commercial electrical installations.
- Main incoming supply boards.
- Automation and control cabinets.
- Telecommunications and data infrastructure.
- Building services and critical electrical systems.
Technical Specifications
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| Impulse Current Iimp (kA) | 12.5 kA | |
|---|---|---|
| Voltage | 320 V | |
| Phase | Single Phase | |
| Poles | 1-pole | |
| Device Type | Replacement cartridge | |
| SPD Type | Type 1+2 | |
| Nominal Discharge Current (In) | 20 kA | |
| 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 |
Frequently Asked Questions
What is the Mersen 83120003 used for?
The Mersen 83120003 is a replacement cartridge for compatible Mersen Surge-Trap Type 1+2 surge protective devices.
What is the model reference?
The model reference is SP12-12K320V.
What surge protection classification does it provide?
It provides Type 1+2 / Class I+II surge protection for low-voltage power distribution systems.
What is the maximum continuous operating voltage?
The cartridge has a maximum continuous operating voltage of 320 V AC.
Where is this cartridge typically installed?
It is installed in compatible Mersen Surge-Trap pluggable surge protection devices fitted within electrical distribution boards and control panels.
Trusted by Electrical Professionals Worldwide
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.
