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.
K2-1P320-M Mersen Surge Protector Type 2 SPD 1 Pole 277 Volt 20KA L-N Remote Indication
Mersen 44020107 K2-1P320-M Surge-Trap K2 Type 2 single-pole surge protection device with 320 V AC maximum continuous operating voltage, 20 kA nominal discharge current and 50 kA maximum discharge current.
£34.12
Why Choose the Mersen 44020107 Surge-Trap K2 Surge Protection Device?
The Mersen 44020107, also identified as the K2-1P320-M, is a compact and dependable Type 2 surge protection device (SPD) designed to protect low-voltage electrical installations against transient overvoltages. As part of the advanced Mersen Surge-Trap K2 series, it provides reliable secondary surge protection for commercial, industrial and infrastructure electrical systems.
This single-pole surge arrester uses a pluggable protection cartridge, helping simplify inspection, servicing and replacement. A built-in visual status indicator provides clear confirmation of operating condition, while the integrated microswitch enables remote monitoring through control panels, building-management systems or industrial automation equipment.
With a maximum continuous operating voltage of 320 V AC, a nominal discharge current of 20 kA and a maximum discharge current of 50 kA, the Mersen 44020107 provides robust protection against induced voltage surges. Its one-module DIN-rail format makes it suitable for installation in compact distribution boards and electrical control enclosures.
Key Advantages
- Reliable Type 2 surge protection for low-voltage electrical installations.
- 50 kA maximum discharge current for effective transient overvoltage protection.
- 320 V AC maximum continuous operating voltage.
- Pluggable cartridge design simplifies maintenance and replacement.
- Integrated microswitch supports remote status indication.
- Compact single-module design for standard DIN-rail distribution boards.
Key Features
- Mersen Surge-Trap K2 series.
- Type 2 / Class II surge protection device.
- Single-pole, 1+0 configuration.
- 320 V AC maximum continuous operating voltage.
- 20 kA nominal discharge current.
- 50 kA maximum discharge current.
- Voltage protection level of ≤1.5 kV.
- Visual status indicator and remote signalling microswitch.
- Dynamic thermal disconnection with open-circuit failure mode.
- Pluggable cartridge and DIN-rail mounting format.
Reliable Surge Protection for Electrical Installations
Transient overvoltages can be caused by lightning activity, utility switching operations and the operation of inductive electrical equipment. These short-duration voltage spikes can damage control systems, machinery, power supplies and sensitive electronic components.
The Mersen Surge-Trap K2 series is designed to divert damaging surge currents safely away from connected equipment. Its high discharge capacity, rapid response time and thermal disconnection system help maintain dependable protection while reducing the risk of equipment failure and costly operational downtime.
Typical Applications
- Commercial and industrial distribution boards.
- Electrical control panels and switchgear.
- Building-management and automation systems.
- Manufacturing machinery and production equipment.
- Power supplies, drives and electronic control equipment.
- Secondary surge protection in low-voltage installations.
Technical Specifications
Tick the specs you need, then view products that match.
| Voltage | 277 V | |
|---|---|---|
| Phase | Single Phase | |
| Poles | 1-pole | |
| Device Type | Surge protection device | |
| SPD Type | Type 2 | |
| Earthing System | TN-C, TN-S, TT | |
| Nominal Discharge Current (In) | 20 kA | |
| Remote Signal | Yes | |
| Manufacturer | Mersen | |
| Series | Surge-Trap K2 | |
| Model | K2-1P320-M | |
| SKU / part number | 44020107 | |
| Product type | Surge protection device | |
| SPD classification | Type 2 / Class II | |
| Number of poles | 1 | |
| Internal configuration | 1+0 | |
| Maximum continuous operating voltage | 320 V AC | |
| Nominal voltage | 277 V AC, 50 / 60 Hz | |
| Nominal discharge current | 20 kA | |
| Maximum discharge current | 50 kA | |
| Voltage protection level | ≤1.5 kV | |
| Response time | ≤25 ns | |
| Maximum back-up fuse | 315 A gG | |
| IEC short-circuit withstand | 25 kA | |
| Network compatibility | TN-S, TN-C and TT systems for L-N protection | |
| Status indication | Visual indicator and microswitch | |
| Protection rating | IP20 | |
| Mounting type | DIN rail | |
| DIN rail modules | 1 | |
| Operating temperature | -40 to +85 °C | |
| Dimensions (H × W × D) | approx. 104.6 × 18 × 68.2 mm | |
| Net weight | approx. 0.125 kg | |
| EAN | 8435297889731 | |
| HS Code | 85363090 | |
| Country of Manufacture | Spain |
Frequently Asked Questions
What is the Mersen 44020107 used for?
The Mersen 44020107 is used to protect low-voltage electrical installations and connected equipment against transient overvoltages caused by lightning activity and electrical switching events.
What type of surge protection device is the Mersen 44020107?
It is a Type 2 / Class II surge protection device intended primarily as a secondary level of protection within electrical distribution systems.
What is the maximum discharge current?
The Mersen 44020107 has a maximum discharge current of 50 kA using an 8/20 microsecond surge waveform.
Does this surge protector support remote monitoring?
Yes. The K2-1P320-M includes an integrated microswitch that can provide remote status indication to a control panel or monitoring system.
Can the protection cartridge be replaced?
Yes. The device has a pluggable design, allowing the surge protection cartridge to be replaced without removing the complete base assembly from the DIN rail.
Trusted Electrical Protection from Mersen
Mersen Surge-Trap protection devices are widely used by electrical engineers, panel builders and industrial operators to protect critical equipment against damaging transient overvoltages.
