Mersen K2-1P320 Type 2 surge protection device with 320 V AC operating voltage, 50 kA maximum discharge current and pluggable DIN rail mounting for 277 V AC single-phase electrical systems.
£38.54
The Mersen 44020106 K2-1P320 is a high-performance Type 2 Surge Protection Device (SPD) designed to protect single-phase low-voltage electrical installations against transient overvoltages caused by switching operations and indirect lightning strikes. Part of the proven Mersen Surge-Trap® K - K2 Series, this pluggable SPD delivers dependable second-stage surge protection for commercial, industrial and infrastructure applications.
Designed for installation within distribution boards, the K2-1P320 features a compact DIN rail mounted housing with replaceable pluggable protection cartridges. This modular construction enables quick maintenance while reducing downtime and maintaining continuous protection for connected electrical equipment.
With a 320 V AC maximum continuous operating voltage (Uc), a 50 kA maximum discharge current (Imax) and a 20 kA nominal discharge current (In), the K2-1P320 is specifically designed for 277 V AC single-phase TNS, TNC and TT (L-N only) electrical systems.
The Mersen K2-1P320 safely diverts damaging transient surge currents away from connected equipment before they can affect switchgear, PLCs, drives, building management systems and other sensitive electronic devices. This helps reduce maintenance costs, minimise downtime and improve overall installation reliability.
Its combination of high discharge capacity, compact dimensions and pluggable construction makes it an ideal solution for industrial control panels, commercial distribution boards and electrical installations requiring dependable secondary surge protection.
| Voltage | 277 V |
|---|---|
| Phase | Single Phase |
| Manufacturer | Mersen |
| Series | Surge-Trap® K - K2 Series |
| Model | K2-1P320 |
| Part Number | 44020106 |
| EAN | 8435297889656 |
| Product type | Type 2 Surge Protection Device (SPD) |
| IEC SPD Type | Class II |
| UL SPD Type | Type 1 Component Assembly |
| Maximum continuous operating voltage (Uc) | 320 V AC |
| Nominal operating voltage (Un) | 277 V AC |
| Maximum discharge current (Imax) | 50 kA (8/20 μs) |
| Nominal discharge current (In) | 20 kA (8/20 μs) |
| Protection level (Up) | ≤1.5 kV |
| Configuration | 1+0 (1 Pole) |
| Network compatibility | TNS, TNC, TT (L-N only) |
| Maximum back-up fuse | 315 A gG |
| Rated short-circuit withstand (ISCCR) | 25 kA |
| Residual current (Ipe) | <1 mA |
| Response time | ≤25 ns |
| Dynamic thermal disconnection | Yes |
| Mounting type | DIN rail |
| Format | Pluggable |
| Protection rating | IP20 |
| Operating temperature | -40°C to +80°C |
| Housing material | PA6 CT1 & PA66 CT1 |
| Dimensions (H × W × D) | Approx. 90 × 18 × 74.4 mm |
| Weight | Approx. 0.125 kg |
| RoHS compliant | Yes |
| HS Code | 85363090 |
| Country of Manufacture | Spain |
It provides Type 2 surge protection for single-phase electrical installations against transient overvoltages caused by switching events and indirect lightning activity.
The K2-1P320 is designed for 277 V AC TNS, TNC and TT (L-N only) electrical systems.
The device provides a 20 kA nominal discharge current (In) and a 50 kA maximum discharge current (Imax).
No. The K2-1P320 features a visual status indicator only. For remote signalling functionality, choose the K2-1P320-M model.
The surge protection device mounts directly onto a standard DIN rail and features a replaceable pluggable cartridge for fast servicing and maintenance.
Mersen Surge-Trap® K Series surge protection devices are trusted by electricians, panel builders and electrical engineers worldwide to protect low-voltage electrical systems from damaging transient overvoltages.
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2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...