Why Choose the Finder 7P.20.8.275.0020 Replacement Surge Protection Module?
The Finder 7P.20.8.275.0020 is a genuine replacement varistor cartridge for Finder 7P Series Type 2 surge protection devices (SPDs). Designed to restore the protective function of compatible surge arresters, this plug-in module provides an efficient maintenance solution for electrical distribution systems exposed to switching transients and lightning-induced overvoltages.
Featuring a 275 V AC / 350 V DC maximum continuous operating voltage, the Finder 7P.20.8.275.0020 delivers a 20 kA nominal discharge current and 40 kA maximum discharge current, both specified using the 8/20 µs surge waveform. Its varistor-based protection technology helps limit transient overvoltages reaching connected electrical equipment.
With a 1.2 kV voltage protection level, fast response characteristics and a compact plug-in design, this replacement module supports convenient maintenance of compatible Finder 7P surge protection assemblies. Rather than replacing the complete surge arrester, maintenance personnel can replace the appropriate cartridge, helping reduce servicing time and unnecessary component replacement.
Key Advantages
- Genuine Finder replacement cartridge: Designed for compatible Finder 7P Series surge protection devices.
- Type 2 surge protection: Supports protection against transient overvoltages caused by switching operations and induced lightning surges.
- 20 kA nominal discharge current: Provides substantial surge current handling capability.
- 40 kA maximum discharge current: Supports protection against higher-energy transient surge events.
- 275 V AC maximum continuous operating voltage: Suitable for compatible low-voltage AC surge protection applications.
- 350 V DC maximum continuous operating voltage: Provides compatibility with specified DC protection applications.
- 1.2 kV voltage protection level: Helps limit transient overvoltages reaching downstream equipment.
- Fast varistor response: Provides rapid reaction to transient overvoltage events.
- Plug-in replacement design: Enables convenient cartridge replacement without replacing the complete compatible SPD assembly.
- Compact construction: Suitable for space-conscious electrical distribution installations.
- Wide temperature tolerance: Designed for operation between −40 and +80 °C.
- IP20 protection: Suitable for installation within appropriately rated electrical enclosures.
- Reduced maintenance complexity: Helps restore protection following cartridge end-of-life indication.
Key Features
- Finder 7P Series replacement surge protection cartridge.
- Varistor-based protection technology.
- Replacement module for compatible Type 2 SPDs.
- 275 V AC maximum continuous operating voltage (Uc).
- 350 V DC maximum continuous operating voltage (Uc).
- 20 kA nominal discharge current (In), 8/20 µs.
- 40 kA maximum discharge current (Imax), 8/20 µs.
- 1.2 kV voltage protection level (Up).
- 25 ns response time.
- Plug-in cartridge mounting for compatible SPD bases.
- Single-module construction.
- IP20 ingress protection.
- −40 to +80 °C operating temperature range.
- Compatible with specified Finder 7P Series surge arresters.
- Suitable for maintenance and replacement applications.
- EAN 8012823334721.
Technical Specifications
- Manufacturer: Finder
- Series: 7P Series
- Model: 7P.20.8.275.0020
- Manufacturer part number: 7P.20.8.275.0020
- Product type: Replacement surge protection cartridge
- Accessory category: Replacement module for surge arrester
- Protection technology: Metal oxide varistor
- SPD application: Type 2 surge protection
- Maximum continuous operating voltage (Uc), AC: 275 V AC
- Maximum continuous operating voltage (Uc), DC: 350 V DC
- Nominal discharge current (In), 8/20 µs: 20 kA
- Maximum discharge current (Imax), 8/20 µs: 40 kA
- Voltage protection level (Up): 1.2 kV
- Response time: 25 ns
- Maximum overcurrent protection for compatible assemblies: 160 A gL/gG
- Mounting method: Plug-in socket / compatible SPD base
- Modular width: 1 module
- Module height: 48.3 mm
- Module width: 17.4 mm
- Module depth: 45 mm
- Net weight: 47.7 g
- Operating ambient temperature: −40 to +80 °C
- Ingress protection: IP20
- Installation: Compatible Finder 7P surge protection assembly
- Country of origin: Czech Republic
- EAN: 8012823334721
Reliable Replacement Protection for Finder 7P Surge Arresters
Surge protection devices help safeguard electrical installations against transient overvoltages generated by lightning activity, switching operations and disturbances in electrical distribution networks. Over time, repeated surge exposure can cause protective varistor elements to deteriorate. The Finder 7P.20.8.275.0020 replacement varistor module provides a practical way to restore the protective capability of compatible Finder 7P Series surge arresters when the original cartridge requires replacement.
The module uses metal oxide varistor technology to respond rapidly to excessive voltage and divert surge current through the protective circuit. Its 20 kA nominal discharge current, 40 kA maximum discharge current and 1.2 kV voltage protection level make it suitable for compatible Type 2 surge protection applications.
Designed as a plug-in replacement cartridge, the Finder 7P.20.8.275.0020 allows maintenance personnel to replace a worn protective module while retaining the compatible SPD base. This approach supports efficient servicing of electrical distribution boards, industrial control cabinets and building electrical infrastructure.
Important installation consideration: The Finder 7P.20.8.275.0020 is a replacement cartridge, not a complete standalone surge protection device. It must be installed in a compatible Finder SPD base, and its suitability must be confirmed against the existing surge arrester model. Electrical isolation, safe replacement procedures and manufacturer installation instructions must be followed.
Typical Applications
- Replacement of varistor cartridges in compatible Finder 7P Series SPDs.
- Maintenance of Type 2 surge protection assemblies.
- Electrical distribution board surge protection servicing.
- Industrial electrical control cabinet maintenance.
- Commercial building electrical infrastructure.
- Low-voltage AC electrical distribution systems.
- Compatible DC surge protection applications.
- Industrial automation equipment supply protection.
- Building management and electrical monitoring installations.
- Preventive maintenance of electrical surge protection systems.
- Replacement of end-of-life surge arrester cartridges.
- Electrical panel-building and maintenance operations.
