Why Choose the Finder 7P.04.8.275.1012 Surge Protection Device?
The Finder 7P.04.8.275.1012 is a Type 1+2 surge protection device (SPD) designed to protect low-voltage electrical installations against transient overvoltages caused by lightning activity and electrical switching operations. Part of the Finder 7P Series, this four-pole surge arrester is intended for use in three-phase electrical distribution systems where coordinated protection against high-energy surges is required.
Featuring a 275 V AC maximum continuous operating voltage for its line protection elements, the Finder 7P.04.8.275.1012 is designed for 230/400 V AC three-phase installations. Its combined Type 1 and Type 2 protection capability makes it suitable for installation at electrical distribution board locations where lightning impulse currents and switching-induced transient overvoltages must be managed.
The device uses surge-limiting protection technology to divert transient currents away from connected electrical equipment. Its modular DIN rail construction supports integration into industrial switchboards, commercial distribution boards and building electrical infrastructure, helping reduce the risk of surge-related damage to sensitive electronic equipment.
Key Advantages
- Combined Type 1+2 surge protection for lightning-induced and switching-related overvoltages.
- Four-pole configuration suitable for compatible three-phase electrical distribution systems.
- 275 V AC maximum continuous operating voltage for the line protection elements.
- Designed for 230/400 V AC low-voltage installations.
- Helps protect sensitive electrical and electronic equipment against transient overvoltages.
- Suitable for use in electrical distribution boards and industrial control panels.
- 35 mm DIN rail mounting supports convenient panel integration.
- Modular construction simplifies electrical cabinet installation.
- Supports coordinated surge protection strategies within building electrical systems.
- Suitable for industrial, commercial and infrastructure applications.
- Part of the established Finder 7P Series surge protection range.
Key Features
- Finder 7P Series surge protection device.
- 7P.04 four-pole surge arrester configuration.
- Type 1+2 SPD for combined lightning current and transient overvoltage protection.
- 275 V AC maximum continuous operating voltage for line protection elements.
- Designed for compatible 230/400 V AC three-phase installations.
- Protective diversion of transient surge currents.
- Modular design for electrical distribution board installation.
- 35 mm DIN rail mounting.
- Suitable for installation as part of a coordinated surge protection arrangement.
- Designed to help protect downstream electrical and electronic equipment.
Technical Specifications
- Manufacturer: Finder
- Series: 7P Series
- Product family: 7P.04
- Model: 7P.04.8.275.1012
- Product type: Surge protection device / surge arrester
- SPD classification: Type 1+2
- Number of poles: 4
- Electrical system: Three-phase AC
- Nominal installation voltage: 230/400 V AC
- Maximum continuous operating voltage (Uc): 275 V AC for line protection elements
- Protection function: Lightning impulse and transient overvoltage protection
- Installation type: Low-voltage electrical distribution board
- Mounting: 35 mm DIN rail
- Relevant SPD standard: EN/IEC 61643-11
- Application: Electrical installation and equipment surge protection
- Manufacturer part number: 7P.04.8.275.1012
Combined Type 1 and Type 2 Surge Protection
The Finder 7P.04.8.275.1012 provides combined surge protection functionality for low-voltage electrical installations. Type 1 protection is intended to handle high-energy lightning impulse currents, while Type 2 protection limits transient overvoltages that may otherwise reach downstream equipment.
In a three-phase distribution system, electrical surges can arise from nearby lightning activity, disturbances on the incoming electrical supply and switching of inductive loads. A correctly selected surge protection device provides a low-impedance path for transient surge currents, helping limit the voltage appearing across protected equipment.
Effective protection depends on correct SPD selection and installation. Engineers should verify the earthing arrangement, lightning protection requirements, impulse current rating, nominal discharge current, voltage protection level, backup overcurrent protection and conductor lengths against the manufacturer's technical documentation.
Protecting Industrial and Commercial Electrical Equipment
Modern electrical installations frequently contain sensitive devices such as PLCs, electronic power supplies, variable frequency drives, communication equipment and building automation controllers. Transient overvoltages can damage these components or interrupt operation, leading to maintenance costs and unplanned downtime.
The Finder 7P.04.8.275.1012 is designed to form part of an electrical surge protection strategy for three-phase distribution systems. Its combined Type 1+2 classification makes it relevant to installations requiring protection at incoming distribution points or other locations identified through an appropriate surge risk assessment.
For effective protection, the SPD must be coordinated with the electrical installation's earthing system, upstream protective devices and any downstream surge arresters. Installation should be carried out by a competent electrician in accordance with applicable electrical standards and Finder's installation instructions.
Typical Applications
- Three-phase industrial electrical distribution boards.
- Commercial building main distribution panels.
- Industrial switchgear and control cabinets.
- Manufacturing machinery electrical supplies.
- PLC and industrial automation installations.
- Variable frequency drive and motor control systems.
- Building management and HVAC electrical systems.
- Power distribution infrastructure.
- Renewable energy installations with compatible AC distribution systems.
- Telecommunications and electronic equipment supplies.
- Facilities requiring coordinated lightning and surge protection.
- OEM electrical distribution and control equipment.
