Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
K1-1P275-M Mersen Surge Protector Type 1+2 SPD 1 Pole 230 Volt 20KA L-N Remote Indication
Mersen K1-1P275-M Type 1+2 pluggable surge protection device with integrated remote signalling contact for 230 V AC systems.
£72.17
Why Choose the Mersen K1-1P275-M Type 1+2 Surge Protection Device?
The Mersen K1-1P275-M, product code 44120103, is a premium Type 1+2 Surge Protection Device (SPD) designed to protect low-voltage electrical installations from lightning-induced surges and transient overvoltages. As part of the Mersen Surge-Trap® K1 Series, it provides both Type 1 and Type 2 protection in a compact, pluggable module with the added benefit of an integrated remote signalling contact for continuous status monitoring.
Designed for single-phase AC systems, the K1-1P275-M features a 1+0 protection configuration, a maximum continuous operating voltage (Uc) of 275 V AC, and a replaceable cartridge for simplified maintenance. The integrated microswitch enables remote indication of the SPD status, making it particularly suitable for monitored industrial and commercial installations.
With a 12.5 kA lightning impulse current (Iimp), 50 kA maximum discharge current (Imax), 20 kA nominal discharge current (In) and a voltage protection level (Up) of ≤1.5 kV, the K1-1P275-M delivers dependable protection for sensitive electrical equipment while complying with IEC 61643-11.
Key Advantages
- Combined Type 1 + Type 2 surge protection.
- Remote signalling contact for monitoring system status.
- Designed for 230 V single-phase AC installations.
- Pluggable cartridge enables quick maintenance.
- 12.5 kA lightning impulse current (Iimp).
- 50 kA maximum discharge current (Imax).
Key Features
- Manufacturer: Mersen
- Series: Surge-Trap® K1
- Model: K1-1P275-M
- Product code: 44120103
- SPD Type: IEC Class I + II (Type 1+2)
- Configuration: 1+0 (L-N)
- Integrated remote signalling contact.
- Visual operating status indicator.
Reliable Surge Protection with Remote Monitoring
Type 1+2 surge protection devices safely divert damaging transient overvoltages away from sensitive electrical equipment before they can cause insulation breakdown or equipment failure. The K1-1P275-M provides both lightning current protection and switching surge protection in one compact device.
The integrated remote signalling contact enables building management systems (BMS), monitoring equipment or PLCs to receive immediate notification should the protection module require replacement, reducing maintenance time and improving system reliability in critical installations.
Typical Applications
- Main electrical distribution boards.
- Industrial control panels.
- Commercial buildings.
- Building management systems (BMS).
- Data centres.
- Telecommunications equipment.
- EV charging infrastructure.
- Solar PV installations.
- Water treatment facilities.
Technical Specifications
Tick the specs you need, then view products that match.
| Impulse Current Iimp (kA) | 12.5 kA | |
|---|---|---|
| Voltage | 230 V | |
| Phase | Single Phase | |
| Device Type | Surge protection device | |
| SPD Type | Type 1+2 | |
| Earthing System | TN-C, TN-S, TT | |
| Nominal Discharge Current (In) | 20 kA | |
| Remote Signal | Yes | |
| Manufacturer | Mersen | |
| Series | Surge-Trap® K1 | |
| Model | K1-1P275-M | |
| Product code | 44120103 | |
| Product type | Type 1+2 Surge Protection Device | |
| IEC SPD classification | Class I + II | |
| UL classification | Type 1 Component Assembly | |
| System configuration | TN-S, TN-C, TT | |
| Nominal voltage (Un) | 230 V AC | |
| Maximum continuous operating voltage (Uc) | 275 V AC | |
| Lightning impulse current (Iimp 10/350 μs) | 12.5 kA | |
| Maximum discharge current (Imax 8/20 μs) | 50 kA | |
| Nominal discharge current (In 8/20 μs) | 20 kA | |
| Voltage protection level (Up) | ≤1.5 kV | |
| Remote indication | Yes | |
| Mounting | 35 mm DIN rail | |
| Module type | Pluggable | |
| Status indication | Visual and remote | |
| Flammability rating | UL94 V-0 | |
| Width | 18 mm | |
| Height | 90 mm | |
| Depth | 90.4 mm | |
| Weight | Approx. 0.178 kg | |
| Applicable standard | IEC 61643-11 | |
| RoHS compliant | Yes |
Frequently Asked Questions
What is the Mersen K1-1P275-M used for?
It protects single-phase low-voltage electrical installations against lightning currents and transient overvoltages while providing remote status monitoring.
What is the difference between the K1-1P275 and K1-1P275-M?
The K1-1P275-M includes an integrated remote signalling microswitch, allowing the status of the surge protection device to be monitored remotely.
What is the maximum continuous operating voltage?
The device is designed for systems with a continuous operating voltage of 275 V AC.
Can the surge protection cartridge be replaced?
Yes. The K1-1P275-M features a pluggable cartridge that can be replaced without removing the DIN rail base.
Where is this SPD typically installed?
It is typically installed in the main distribution board of industrial, commercial and residential electrical installations requiring monitored surge protection.
Trusted for Professional Surge Protection
Mersen Surge-Trap® K1 Series surge protection devices are trusted by electrical engineers, panel builders and contractors for dependable lightning protection, transient overvoltage suppression and reliable remote status monitoring.
