Finder 7P.25.8.275.1020 Type 2 surge protection device for three-phase TN-S systems with 3+N configuration, four replaceable varistor modules, 20 kA nominal discharge current and DIN rail mounting.
£239.17
The Finder 7P.25.8.275.1020 is a high-performance Type 2 surge protection device (SPD) designed to protect three-phase TN-S electrical installations with neutral against transient overvoltages caused by induced lightning surges and switching events. As part of the trusted Finder 7P Series, it delivers reliable protection for industrial, commercial and infrastructure electrical systems where maintaining equipment uptime is essential.
The device features four replaceable varistor modules providing protection across L1, L2, L3 and N-PE. Visual status indication and an integrated remote signalling contact allow maintenance personnel to monitor the condition of the protection modules, enabling preventative servicing and reducing downtime.
With a 230 V AC nominal voltage, 275 V AC maximum continuous operating voltage, 20 kA nominal discharge current and 40 kA maximum discharge current, the Finder 7P.25.8.275.1020 is ideal for protecting electrical distribution boards, automation panels, machinery and sensitive electronic equipment throughout three-phase TN-S power systems.
Type 2 surge protection devices reduce the risk of damage caused by transient overvoltages by safely diverting surge energy away from connected electrical equipment. This helps protect PLCs, drives, power supplies, switchgear, instrumentation and automation systems while improving the reliability of industrial and commercial installations.
The Finder 7P.25.8.275.1020 is designed for installation between LPZ 1 and LPZ 2, providing effective downstream protection for three-phase TN-S systems. Its replaceable varistor modules and remote monitoring capability make it an excellent choice for professional electrical installations.
| Manufacturer | Finder |
|---|---|
| Series | 7P Series |
| Model | 7P.25.8.275.1020 |
| Product type | Surge protection device / surge arrester |
| SPD type | Type 2 |
| Network type | Three-phase TN-S with neutral |
| Configuration | 3+N |
| Protection technology | Four replaceable varistor modules |
| Nominal voltage | 230 V AC |
| Maximum continuous operating voltage (Uc) | 275 V AC / 350 V DC |
| Nominal discharge current (In) | 20 kA |
| Maximum discharge current (Imax) | 40 kA |
| Voltage protection level (Up) | 1.35 kV |
| Maximum backup fuse | 160 A gL/gG |
| Protection rating | IP20 |
| Mounting type | 35 mm DIN rail mounting |
| Dimensions (H × W × D) | approx. 82.8 × 71.8 × 65.9 mm |
| Operating temperature | -40 °C to +80 °C |
| HS Code | 85363030 |
The Finder 7P.25.8.275.1020 protects three-phase TN-S electrical systems from transient overvoltages caused by induced lightning surges and switching events.
This is a Type 2 surge protection device designed for protecting low-voltage electrical installations against induced and switching overvoltages.
The device is designed for three-phase TN-S systems with neutral using a 3+N configuration.
The Finder 7P.25.8.275.1020 provides a 20 kA nominal discharge current and a 40 kA maximum discharge current.
The device mounts onto a standard 35 mm DIN rail inside electrical distribution boards and control panels.
Finder 7P Series surge protection devices are trusted by electrical contractors, panel builders and automation engineers to provide dependable protection for low-voltage industrial and commercial electrical installations.
● 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...