Mersen 83120117 STPT12-12K320V-2PGM Type 1+2 surge protection device with 12.5 kA lightning impulse current, 277 V nominal operating voltage, 1Ph+N 1+1 TT configuration, 2-pole pluggable DIN rail design and remote indication.
Original price was: £167.43.£133.94Current price is: £133.94.
The Mersen 83120117 STPT12-12K320V-2PGM is a reliable Type 1+2 surge protection device (SPD) designed to protect low-voltage electrical installations against lightning currents and transient overvoltages. Part of the Mersen Surge-Trap® Pluggable STPT12 Series, it is suitable for main distribution boards, incoming power supply panels and installations requiring dependable first-level surge protection.
This device provides combined protection for single-phase plus neutral systems, using a 1+1 TT configuration with L-N and N-PE protection modes. Its pluggable format allows quick replacement of protection modules, while integrated remote indication supports convenient status monitoring from a panel indicator or control system.
With a 12.5 kA lightning impulse current (10/350 μs), 277 V nominal operating voltage (Un) and 320 V L-N maximum continuous operating voltage (Uc), the 83120117 provides robust protection for industrial, commercial and infrastructure electrical systems.
Surge protection devices help protect electrical equipment from damaging voltage spikes caused by lightning activity, switching operations and disturbances on the power network. Installing a Type 1+2 SPD at the incoming supply point helps reduce the risk of equipment damage, downtime and disruption to critical electrical systems.
The Mersen STPT12 Series is engineered for low-voltage distribution applications where reliable surge protection, compact installation and straightforward maintenance are required. The pluggable format allows protection modules to be replaced quickly without rewiring the complete assembly.
| Voltage | 277 V |
|---|---|
| Phase | Single Phase |
| Manufacturer | Mersen |
| Series | Surge-Trap® Pluggable STPT12 |
| Model | STPT12-12K320V-2PGM |
| Part number | 83120117 |
| Product type | Type 1+2 Surge Protection Device |
| IEC classification | Class I+II |
| Lightning impulse current (Iimp 10/350 μs) | 12.5 kA |
| Nominal discharge current (In 8/20 μs) | 20 kA |
| Nominal operating voltage (Un) | 277 V AC |
| Maximum continuous operating voltage L-N (Uc) | 320 V AC |
| Maximum continuous operating voltage N-PE (Uc) | 255 V AC |
| Protection modes | L-N / N-PE |
| System configuration | 1+1 TT |
| Number of poles | 2 |
| Module width | 2 modules |
| Mounting type | DIN rail |
| Remote indication | Yes |
| Format | Pluggable |
| HS Code | 85363090 |
| Country of Manufacture | Spain |
It is used to protect single-phase plus neutral low-voltage electrical installations from lightning currents and transient overvoltages.
The 83120117 is a Type 1+2 (Class I+II) surge protection device for combined lightning current and surge protection.
It has a 277 V AC nominal operating voltage and a 320 V AC maximum continuous operating voltage L-N.
Yes. This model includes remote indication, allowing the SPD status to be monitored from a control system or panel indicator.
It is typically installed on a DIN rail in main distribution boards or incoming supply panels as the first level of surge protection.
Mersen Surge-Trap® surge protection devices are trusted worldwide to help protect electrical installations, industrial equipment and critical infrastructure from the damaging effects of lightning strikes and transient overvoltages.
● 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...