Why Choose the Finder 7P.31.8.275.0005 Type 3 Surge Protection Device?
The Finder 7P.31.8.275.0005 is a compact and reliable Type 3 AC surge protection device (SPD) designed to protect LED lighting installations and sensitive electrical equipment against transient overvoltages. As part of the Finder 7P surge protection series, this single-phase surge arrester provides point-of-use protection against voltage spikes caused by lightning-induced surges and electrical switching events.
Specifically designed for LED luminaires, lighting drivers and electronic equipment, the Finder 7P.31.8.275.0005 features a compact, sealed construction that allows installation close to the equipment requiring protection. Its unipolar L-N protection configuration helps limit damaging voltage transients across the live and neutral conductors, reducing the risk of premature failure of sensitive electronic components.
With a 230 V AC nominal operating voltage, a 275 V AC maximum continuous operating voltage and a 5 kA nominal discharge current, the Finder 7P.31.8.275.0005 is well suited to single-phase lighting circuits. Its IP65 protection rating, integrated LED fault indication and two pre-wired 150 mm connection leads make it particularly suitable for street lighting, commercial LED luminaires, architectural lighting and industrial lighting systems.
Key Advantages
- Compact Type 3 surge protection device designed for LED lighting and sensitive electronic equipment.
- 230 V AC nominal operating voltage suitable for standard single-phase electrical installations.
- 275 V AC maximum continuous operating voltage for reliable protection on mains-powered lighting circuits.
- 5 kA nominal discharge current for effective protection against transient overvoltages.
- 10 kA maximum discharge current for handling higher-energy surge events.
- 1.6 kV voltage protection level helps limit transient voltage stress on connected equipment.
- IP65-rated enclosure provides protection against dust ingress and water jets.
- Integrated LED fault indication identifies when the surge protection device requires replacement.
- Two pre-wired 150 mm connection leads simplify integration into lighting equipment.
- 25 ns response time enables rapid response to transient overvoltages.
- Compact construction allows installation inside LED luminaires, lighting housings and electrical junction boxes.
- Suitable for use as the final stage of a coordinated surge protection system.
Key Features
- Finder 7P Series surge protection device.
- Type 3 (Class III) surge protection classification.
- Single-phase AC surge protection for sensitive electrical equipment.
- Unipolar L-N protection configuration.
- Metal oxide varistor (MOV) surge protection technology.
- 230 V AC nominal voltage (UN).
- 275 V AC maximum continuous operating voltage (UC).
- 5 kA nominal discharge current (In) using an 8/20 µs surge waveform.
- 10 kA maximum discharge current (Imax) using an 8/20 µs surge waveform.
- 10 kV combined-wave open-circuit test voltage (UOC).
- 1.6 kV voltage protection level (Up) between line and neutral.
- 25 ns response time for rapid transient suppression.
- LED indication of surge protection device replacement condition.
- IP65 protection rating for use in suitable lighting installations.
- Two 150 mm connection leads for straightforward electrical connection.
- 1.5 kA short-circuit current rating (ISSCR) with specified upstream protection.
- Operating temperature range of −25 to +80 °C.
- Designed in accordance with EN 61643-11:2012.
Technical Specifications
- Manufacturer: Finder
- Series: 7P Surge Protection Devices
- Model: 7P.31.8.275.0005
- Alternative part number: 7P3182750005
- Product type: AC surge protection device for LED lighting
- SPD classification: Type 3 / Class III
- Protection technology: Metal oxide varistor (MOV)
- Protection configuration: Unipolar L-N
- Number of poles: 1
- Nominal voltage (UN): 230 V AC
- Maximum continuous operating voltage (UC): 275 V AC
- Nominal discharge current (In): 5 kA (8/20 µs)
- Maximum discharge current (Imax): 10 kA (8/20 µs)
- Combined-wave open-circuit voltage (UOC): 10 kV
- Voltage protection level L-N (Up): 1.6 kV
- Response time L-N (ta): 25 ns
- Short-circuit current rating (ISSCR): 1.5 kA rms
- Maximum upstream overcurrent protection: 16 A gL/gG fuse, B16 A or C10 A circuit breaker
- Ambient operating temperature: −25 to +80 °C
- Protection rating: IP65
- Installation type: Surface / recessed installation within suitable equipment
- Connection type: Pre-wired leads
- Number of connection leads: 2
- Connection lead length: 150 mm
- Status indication: LED replacement indicator
- Remote signalling: Not included
- Dimensions (H × W × D): approx. 39 × 44 × 13 mm
- Net weight: approx. 28.4 g
- EAN: 8012823413969
- Country of origin: Czechia
- Applicable standard: EN 61643-11:2012
- Primary application: LED lighting and single-phase electronic equipment protection
Reliable Type 3 Surge Protection for LED Lighting Systems
Modern LED lighting systems contain sensitive electronic components, including LED drivers, power supplies and control circuits, which can be damaged by transient overvoltages. These disturbances may originate from nearby lightning activity, electrical switching operations or other events on the electrical supply network. The Finder 7P.31.8.275.0005 helps protect connected lighting equipment by limiting the voltage across the live and neutral conductors during transient surge events.
The device uses metal oxide varistor technology, which maintains high electrical resistance during normal operation. When the voltage rises above the varistor's protective threshold, its resistance decreases rapidly, allowing surge current to flow through the protective component and limiting the voltage applied to connected equipment. With a 1.6 kV voltage protection level and 25 ns response time, the Finder 7P.31.8.275.0005 provides rapid suppression of potentially damaging voltage transients.
As a Type 3 surge protection device, this model is intended for installation close to the equipment requiring protection. It is particularly useful as a final stage of surge protection within lighting systems, where upstream Type 1 or Type 2 devices may already provide protection at the main distribution board or electrical sub-distribution level. Correct coordination of surge protection devices helps improve the overall protection of sensitive electrical equipment.
The IP65-rated enclosure makes the Finder 7P.31.8.275.0005 suitable for installation in demanding lighting environments where resistance to dust and moisture is important. Its compact dimensions and two pre-wired 150 mm leads allow convenient integration into LED luminaire housings, electrical junction boxes and other suitable installation locations.
An integrated LED status indicator provides a visual indication when the surge protection device has reached its replacement condition. This allows maintenance personnel to identify when the unit requires attention, helping maintain the intended level of protection for connected lighting equipment. Unlike modular DIN rail surge arresters with replaceable cartridges, the Finder 7P.31.8.275.0005 is a compact wired device intended to be replaced as a complete unit when exhausted.
Typical Applications
- LED street lighting and public lighting installations.
- Outdoor LED luminaires and architectural lighting.
- Commercial and industrial LED lighting systems.
- LED floodlights and security lighting installations.
- Car park lighting and exterior building illumination.
- Tunnel lighting and transport infrastructure.
- LED drivers and electronic lighting power supplies.
- Warehouse and factory lighting equipment.
- Building façade and landscape lighting installations.
- Single-phase electrical equipment requiring point-of-use surge protection.
- Lighting junction boxes and compact electrical enclosures.
- Final-stage surge protection in coordinated electrical protection systems.
