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7P.25.8.275.1020 Finder Surge Protection Device SPD arresters 3ph
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.
£179.38
Why Choose the Finder 7P.25.8.275.1020 Surge Protection Device?
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.
Key Advantages
- Type 2 surge protection device for three-phase TN-S systems.
- Four replaceable varistor modules protecting L1, L2, L3 and N-PE.
- 20 kA nominal discharge current for dependable surge protection.
- 40 kA maximum discharge current for enhanced surge handling capability.
- Visual indicator and remote signalling contact for simple maintenance.
- Compact DIN rail mounting for electrical distribution boards and control panels.
Key Features
- Finder 7P Series surge protection device.
- Type 2 SPD classification.
- Three-phase TN-S system compatibility.
- 3+N pole configuration.
- Four high-performance replaceable varistor modules.
- 275 V AC maximum continuous operating voltage.
- 35 mm DIN rail mounting to EN 60715.
- IP20 protection rating.
Reliable Type 2 Surge Protection for TN-S 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.
Typical Applications
- Three-phase TN-S electrical distribution boards.
- Industrial automation and control panels.
- Commercial switchboards.
- Building services electrical installations.
- EV charging infrastructure.
- Protection of sensitive electronic and electrical equipment.
Technical Specifications
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| Device Type | Surge protection device | |
|---|---|---|
| SPD Type | Type 2 | |
| Nominal Discharge Current (In) | 20 kA | |
| Earthing System | TN-S | |
| 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 |
Frequently Asked Questions
What is the Finder 7P.25.8.275.1020 used for?
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.
What type of surge protection device is this?
This is a Type 2 surge protection device designed for protecting low-voltage electrical installations against induced and switching overvoltages.
Which electrical systems is it suitable for?
The device is designed for three-phase TN-S systems with neutral using a 3+N configuration.
What is the surge current rating?
The Finder 7P.25.8.275.1020 provides a 20 kA nominal discharge current and a 40 kA maximum discharge current.
How is the Finder 7P.25.8.275.1020 installed?
The device mounts onto a standard 35 mm DIN rail inside electrical distribution boards and control panels.
Trusted by Electrical Professionals Worldwide
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.
