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Finder 7P.21.8.150.1015 – 7P Series Surge Protection Devices
Finder 7P.21.8.150.1015 is a single-pole Type 2 varistor surge protection device with 150 V AC maximum continuous operating voltage, 15 kA nominal discharge current, 40 kA maximum discharge current, replaceable protection cartridge and SPDT remote signalling contact.
£53.69
Why Choose the Finder 7P.21.8.150.1015 Type 2 Surge Protection Device?
The Finder 7P.21.8.150.1015 is a compact, single-pole Type 2 surge protection device (SPD) designed to protect low-voltage electrical installations against transient overvoltages caused by switching operations and induced lightning surges. Part of the Finder 7P Series, this surge arrester uses metal oxide varistor (MOV) technology to help limit potentially damaging voltage spikes affecting electrical and electronic equipment.
Featuring a 150 V AC maximum continuous operating voltage (Uc), a 15 kA nominal discharge current (In) and a 40 kA maximum discharge current (Imax), the Finder 7P.21.8.150.1015 provides effective Type 2 surge protection for appropriately rated low-voltage AC applications. Its single-pole configuration makes it suitable for use within compatible protection arrangements where individual conductors require surge protection.
This model includes an integrated remote signalling changeover contact (SPDT), allowing the condition of the protective element to be monitored by compatible alarm or supervisory equipment. A visual status indicator provides local confirmation of the varistor's condition, while the replaceable protection cartridge simplifies maintenance. With a compact 17.5 mm DIN rail profile, IP20 protection and a wide operating temperature range, it is well suited to professional electrical distribution and industrial control applications.
Key Advantages
- Type 2 surge protection: Helps protect electrical equipment against induced lightning surges and switching overvoltages.
- 15 kA nominal discharge current: Provides dependable surge current handling using the standard 8/20 µs waveform.
- 40 kA maximum discharge current: Offers substantial transient surge handling capability.
- 150 V AC maximum continuous operating voltage: Supports appropriately rated low-voltage AC circuits.
- Single-pole configuration: Provides flexible integration into suitable electrical protection arrangements.
- Metal oxide varistor technology: Helps limit transient overvoltages across protected conductors.
- Remote signalling contact: Enables monitoring of the SPD's protection status through external equipment.
- Visual condition indicator: Allows quick inspection of the protective cartridge.
- Replaceable varistor module: Supports efficient maintenance without replacing the complete SPD assembly.
- Compact 17.5 mm width: Conserves space in electrical distribution boards and control panels.
- Standard DIN rail mounting: Simplifies installation in compatible electrical enclosures.
- Wide operating temperature range: Supports demanding industrial environments.
- Finder 7P Series construction: Provides a practical surge protection solution for professional electrical installations.
Key Features
- Finder 7P Series surge protection device.
- Type 2 surge arrester.
- Single-pole protection arrangement.
- Metal oxide varistor (MOV) protection technology.
- Maximum continuous operating voltage (Uc): 150 V AC.
- Nominal discharge current (In): 15 kA, 8/20 µs.
- Maximum discharge current (Imax): 40 kA, 8/20 µs.
- Integrated remote signalling via one SPDT changeover contact.
- Visual indicator showing the condition of the varistor.
- Replaceable protective cartridge.
- Compatible with the Finder 07P.01 remote signalling connector arrangement.
- Single-module DIN rail construction.
- Standard 35 mm DIN rail mounting.
- Module width: 17.5 mm.
- Ingress protection: IP20.
- Operating temperature: −40 to +80 °C.
- Designed for installation at suitable lightning protection zone boundaries.
- Compliant with the EN 61643-11 Type 2 surge protection standard.
Reliable Type 2 Surge Protection with Remote Status Monitoring
Industrial and commercial electrical installations can experience transient overvoltages caused by switching operations, inductive loads and lightning-induced disturbances. These short-duration voltage spikes can place considerable stress on electrical insulation, power supplies, electronic controllers and other connected equipment. The Finder 7P.21.8.150.1015 helps reduce these risks by providing a controlled surge current path through its metal oxide varistor protection element.
As a Type 2 SPD, the device is intended for protection against transient surge currents rather than the direct lightning-current duty associated with Type 1 SPDs. Its 15 kA nominal discharge current and 40 kA maximum discharge current provide defined surge-handling characteristics for suitable electrical installations. The 150 V AC Uc rating must be matched to the operating voltage of the protected circuit.
The integrated remote signalling changeover contact is particularly valuable where the surge protector is installed in an electrical cabinet that is not routinely inspected. By connecting the auxiliary contact to a compatible alarm system, PLC input or building management system, maintenance personnel can monitor the condition of the protective element. The local visual indicator provides an additional method for identifying when the varistor cartridge requires replacement.
The replaceable varistor module helps simplify ongoing maintenance, while the narrow DIN rail construction supports installation in space-constrained control panels and distribution boards. For effective surge protection, the SPD must be installed with appropriate upstream protection, suitable earthing and short connection conductors in accordance with Finder's installation instructions and applicable electrical regulations.
Typical Applications
- Low-voltage AC electrical distribution systems.
- Industrial control panels and automation cabinets.
- Electrical equipment operating on appropriately rated 120 V AC circuits.
- Commercial building electrical protection systems.
- Industrial machinery control circuits.
- Power supply and electronic control equipment protection.
- Distribution boards requiring single-pole Type 2 surge protection.
- Electrical installations requiring remote SPD condition monitoring.
- PLC and supervisory monitoring systems.
- Building management and facilities electrical infrastructure.
- Protection arrangements at suitable lightning protection zone boundaries.
- Maintenance and upgrading of existing electrical surge protection systems.
Technical Specifications
| Manufacturer | Finder |
|---|---|
| Series | 7P Series |
| Product family | 7P.21 |
| Model | 7P.21.8.150.1015 |
| Product type | Type 2 surge protection device |
| Protection technology | Metal oxide varistor (MOV) |
| Number of poles | 1 |
| SPD classification | Type 2 |
| Nominal application voltage | 120 V AC |
| Maximum continuous operating voltage (Uc) | 150 V AC |
| Nominal discharge current (In, 8/20 µs) | 15 kA |
| Maximum discharge current (Imax, 8/20 µs) | 40 kA |
| Remote signalling | Yes |
| Remote signalling contact | 1 changeover contact (SPDT) |
| Remote connector system | Finder 07P.01 |
| Local status indication | Visual varistor condition indicator |
| Protective element | Replaceable varistor cartridge |
| Mounting | 35 mm DIN rail, EN 60715 |
| Module width | 17.5 mm |
| Modular size | 1 module |
| Ingress protection | IP20 |
| Operating temperature | −40 to +80 °C |
| Installation environment | Protected electrical enclosure |
| Relevant standard | EN 61643-11:2012 |
| EAN | 8012823453583 |
Frequently Asked Questions
What is the Finder 7P.21.8.150.1015 used for?
The Finder 7P.21.8.150.1015 is a single-pole Type 2 surge protection device used to help protect appropriately rated low-voltage electrical installations against transient overvoltages caused by switching operations and induced lightning surges.
What is the maximum continuous operating voltage?
The Finder 7P.21.8.150.1015 has a maximum continuous operating voltage (Uc) of 150 V AC. The SPD must be selected so that its voltage rating is suitable for the electrical circuit being protected.
What is the nominal discharge current rating?
The device has a nominal discharge current (In) of 15 kA, tested using the standard 8/20 µs surge waveform.
What is the maximum discharge current rating?
The Finder 7P.21.8.150.1015 has a maximum discharge current (Imax) of 40 kA, measured using the 8/20 µs waveform.
Does the Finder 7P.21.8.150.1015 have remote signalling?
Yes. This model includes one SPDT changeover contact for remote indication of the protective element's condition. It can be integrated into compatible alarm, PLC or monitoring systems.
What is the difference between the Finder 7P.21.8.150.0015 and 7P.21.8.150.1015?
Both models are single-pole Type 2 surge protectors with a 150 V AC maximum continuous operating voltage and 15 kA nominal discharge current. The 7P.21.8.150.1015 includes remote signalling, while the 7P.21.8.150.0015 is the corresponding version without a remote signalling contact.
Is the Finder 7P.21.8.150.1015 suitable for 230 V AC circuits?
No. The specified 150 V AC maximum continuous operating voltage is below the normal operating voltage of a 230 V AC circuit. A surge protector with an appropriate Uc rating must be selected for 230 V AC installations.
Can the varistor cartridge be replaced?
Yes. The Finder 7P.21 Series uses replaceable varistor modules. Replacement should be performed using the correct manufacturer-approved cartridge after the installation has been safely isolated.
What does the visual status indicator show?
The visual indicator provides local information about the condition of the varistor protection element, allowing maintenance personnel to identify whether the protective cartridge is functional or requires replacement.
How is the Finder 7P.21.8.150.1015 installed?
The device mounts on a standard 35 mm DIN rail in a suitable electrical enclosure and occupies approximately 17.5 mm of rail width.
Is this surge protector suitable for outdoor installation?
The device has an IP20 ingress protection rating and should be installed inside a suitably protected enclosure. It should not be directly exposed to rain, water spray or excessive dust.
What is the difference between Type 1 and Type 2 surge protection?
Type 1 SPDs are designed and tested for high-energy lightning impulse currents, while Type 2 SPDs are intended to protect against transient surge currents such as induced lightning and switching surges. The Finder 7P.21.8.150.1015 is a Type 2 device.
What should be checked before installing this SPD?
Check the circuit operating voltage, earthing arrangement, required surge current ratings, upstream protective device requirements, connection conductor lengths and compatibility with the electrical installation.
Designed for Professional Electrical Surge Protection
Finder 7P Series surge protection devices provide practical solutions for protecting industrial and commercial electrical installations against transient overvoltages. Combining Type 2 varistor protection, replaceable cartridges, compact DIN rail construction and remote condition signalling, the Finder 7P.21.8.150.1015 supports reliable surge protection and efficient maintenance of appropriately rated low-voltage electrical systems.
