Mersen 83120009 SP12-50K-2PN Type 1+2 neutral replacement cartridge with 1 pole configuration, 255 V AC maximum continuous operating voltage and 25 kA nominal discharge current for compatible Surge-Trap surge protection devices.
Original price was: £120.00.£84.47Current price is: £84.47.
The Mersen 83120009, also known as SP12-50K-2PN, is a dependable Type 1+2 surge protection replacement cartridge designed for compatible Mersen Surge-Trap pluggable surge protection devices. It is used to help protect electrical distribution systems from lightning currents and transient overvoltages in industrial, commercial and building services applications.
As part of the Mersen Surge-Trap STPT12 series, this neutral cartridge is designed for installations requiring coordinated surge protection at the incoming power supply. Its plug-in cartridge format allows quick replacement during maintenance, helping restore protection without replacing the complete surge protection assembly.
With a 25 kA nominal discharge current, 255 V maximum continuous operating voltage and 1 pole neutral configuration, the Mersen 83120009 is a practical choice for maintaining Type 1+2 surge protection systems where neutral line protection is required.
Type 1+2 surge protection devices are commonly installed near the origin of electrical installations to discharge high-energy surge currents and limit transient overvoltages before they reach downstream equipment. Neutral cartridges form part of coordinated SPD systems and help support protection between neutral and earth where required.
The Mersen 83120009 replacement cartridge enables maintenance teams to restore surge protection quickly and efficiently. Its pluggable format makes it suitable for panel builders, electrical contractors and facilities engineers responsible for maintaining critical power distribution infrastructure.
| Phase | Single Phase |
|---|---|
| Manufacturer | Mersen |
| Series | Surge-Trap STPT12 |
| Model | SP12-50K-2PN |
| Manufacturer part number | 83120009 |
| Product type | Surge protection replacement cartridge |
| SPD classification | Type 1+2 / Class I+II |
| Configuration | Neutral cartridge |
| Number of poles | 1 pole |
| Voltage | Neutral |
| Maximum continuous operating voltage (Uc) | 255 V AC |
| Nominal discharge current (In) | 25 kA |
| Protection rating | IP20 |
| Mounting | Pluggable replacement cartridge |
| Barcode | 8435297865049 |
The Mersen 83120009 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 83120009 is SP12-50K-2PN.
This neutral replacement cartridge has a 255 V AC maximum continuous operating voltage.
The Mersen 83120009 is designed for Type 1+2 / Class I+II surge protection assemblies.
It is typically installed in compatible Mersen Surge-Trap pluggable surge protection assemblies within main distribution boards, switchboards and incoming supply panels.
Mersen Surge-Trap surge protection products are widely used by electrical engineers, panel builders and contractors to protect industrial and commercial installations against transient overvoltages and lightning-related surge events.
● Service Agreements
Credit Accounts
Our service agreements are built to support long term procurement relationships. By working closely with engineering teams and procurement departments, we help streamline purchasing processes while ensuring consistent access to critical components and sourcing support when it matters most.
● frequently asked questions
At Led Controls Ltd we help engineers source the right automation and control gear with confidence. below are quick answers to what we are asked most often.
We supply all leading manfacturers in our industry. we offer next day delivery on most poplour products.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
● latest blog
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...