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7P.21.8.275.1020 Finder Surge Protection Device SPD arresters 1ph
Finder 7P.21.8.275.1020 Type 2 surge protection device with single-pole varistor protection, 230 V AC nominal voltage, 20 kA nominal discharge current and DIN rail mounting.
£43.69
Why Choose the Finder 7P.21.8.275.1020 Surge Protection Device?
The Finder 7P.21.8.275.1020 is a compact and reliable Type 2 surge protection device (SPD) designed to protect low-voltage electrical installations against transient overvoltages caused by induced surges and switching events. As part of the Finder 7P Series, it is suitable for single-phase AC systems and selected DC applications requiring dependable panel-level surge protection.
This surge arrester uses a single varistor protection module to help limit voltage peaks before they can damage connected equipment. Its modular DIN rail design allows straightforward installation inside distribution boards, control panels and switchboards, while the replaceable varistor module supports quick maintenance and reduced 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.21.8.275.1020 is ideal for protecting electrical switchboards, automation panels and sensitive downstream equipment from damaging surge events.
Key Advantages
- Type 2 surge protection device for low-voltage electrical systems.
- Single-pole varistor protection for AC and DC applications.
- 20 kA nominal discharge current for reliable surge handling.
- 40 kA maximum discharge current for enhanced protection capacity.
- Replaceable varistor module supports fast servicing.
- Visual and remote status signalling helps simplify maintenance monitoring.
Key Features
- Finder 7P Series surge protection device.
- Type 2 SPD classification.
- Single-pole design with one varistor.
- 230 V AC nominal voltage.
- 275 V AC / 350 V DC maximum continuous operating voltage.
- Voltage protection level up to 1.2 kV.
- 35 mm DIN rail mounting for control panels and distribution boards.
- IP20 protection rating for enclosed electrical installations.
Reliable Type 2 Surge Protection for Electrical Panels
Type 2 surge protection devices are commonly installed in power distribution boards and control panels to limit transient overvoltages caused by switching operations and induced surge events. This helps protect switchgear, power supplies, PLCs, drives, instrumentation and other sensitive electrical equipment.
The Finder 7P.21.8.275.1020 is designed for professional low-voltage installations where compact DIN rail surge protection is required. Its replaceable varistor module and signalling options make it a practical choice for industrial, commercial and OEM electrical panels.
Typical Applications
- Single-phase electrical distribution boards.
- Industrial control panels and automation cabinets.
- Commercial switchboards and building services systems.
- Power supplies, PLCs and control equipment protection.
- OEM machinery panels and electrical enclosures.
- AC and selected DC low-voltage surge protection applications.
Technical Specifications
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| Poles | 1-pole | |
|---|---|---|
| Device Type | Surge protection device | |
| SPD Type | Type 2 | |
| Nominal Discharge Current (In) | 20 kA | |
| Manufacturer | Finder | |
| Series | 7P Series | |
| Model | 7P.21.8.275.1020 | |
| Product type | Surge protection device / surge arrester | |
| SPD Type | Type 2 | |
| Number of poles | 1 pole | |
| Protection technology | Varistor | |
| Nominal voltage | 230 V AC | |
| Maximum continuous operating voltage | 275 V AC / 350 V DC | |
| Nominal discharge current | 20 kA | |
| Maximum discharge current | 40 kA | |
| Voltage protection level | ≤ 1.2 kV | |
| Maximum backup fuse | 160 A gL/gG | |
| Protection rating | IP20 | |
| Mounting type | 35 mm DIN rail mounting | |
| Dimensions (H × W × D) | approx. 89.8 × 17.5 × 56.9 mm | |
| Operating temperature | -40 °C to +80 °C | |
| HS Code | 85363030 |
Frequently Asked Questions
What is the Finder 7P.21.8.275.1020 used for?
The Finder 7P.21.8.275.1020 is used to protect low-voltage electrical installations and switchboards from transient overvoltages caused by induced surges and switching events.
What type of surge protection device is this?
This product is a Type 2 surge protection device, designed for panel-level protection in low-voltage electrical systems.
What is the nominal discharge current?
The Finder 7P.21.8.275.1020 has a 20 kA nominal discharge current and a 40 kA maximum discharge current.
Can the varistor module be replaced?
Yes. The device uses a replaceable varistor module, helping simplify maintenance and reduce downtime.
How is the Finder 7P.21.8.275.1020 installed?
The surge protection device is designed for 35 mm DIN rail mounting inside electrical distribution boards, switchboards and control panels.
Trusted by Electrical Professionals Worldwide
Finder 7P Series surge protection devices are widely used by electrical contractors, panel builders and automation engineers to protect low-voltage installations and sensitive equipment from damaging surge events.
