Mersen 44120209 K1-2PG320-M Type 1+2 surge protection device with 320 V AC operating voltage, 12.5 kA lightning impulse current and pluggable DIN rail design for industrial and commercial electrical installations.
£181.24
The Mersen 44120209 K1-2PG320-M is a high-performance Type 1+2 Surge Protection Device (SPD) engineered to protect low-voltage electrical installations from lightning strikes and transient overvoltages. As part of the trusted Mersen Surge-Trap® K - K1 Series, this pluggable SPD provides dependable protection for commercial, industrial and infrastructure applications.
Designed for installation at the main distribution board, the K1-2PG320-M combines high surge handling capability with a compact DIN rail mounted design. Its integrated remote signalling microswitch enables convenient monitoring of device status, while the visual indication system makes maintenance simple and efficient.
With a 320 V AC maximum continuous operating voltage (Uc), 1+1 protection configuration and 12.5 kA lightning impulse current (Iimp), this surge protector is ideal for protecting sensitive electrical equipment in TT and TNS systems against damaging surge events.
The Mersen K1-2PG320-M protects electrical installations by safely diverting high-energy surge currents caused by lightning strikes and switching transients. This helps reduce equipment damage, minimise downtime and improve the long-term reliability of electrical systems.
Its robust construction, pluggable cartridge design and integrated remote signalling make it well suited for modern industrial facilities, commercial buildings, renewable energy installations and critical infrastructure requiring dependable surge protection.
| Voltage | 277 V |
|---|---|
| Manufacturer | Mersen |
| Series | Surge-Trap® K - K1 Series |
| Model | K1-2PG320-M |
| Part Number | 44120209 |
| Product type | Type 1+2 Surge Protection Device (SPD) |
| IEC SPD Type | Class I+II |
| UL SPD Type | Type 1 Component Assembly |
| Maximum continuous operating voltage (Uc) | 320 V AC |
| Nominal operating voltage (Un) | 277 V AC |
| Lightning impulse current (Iimp) | 12.5 kA |
| Nominal discharge current (In) | 20 kA |
| Maximum discharge current (Imax) | 50 kA |
| Configuration | 1+1 |
| Number of poles | 2 |
| System compatibility | TT, TNS |
| Protection modes | L-N / N-PE |
| Mounting type | DIN rail |
| Format | Pluggable |
| Indication | Green (OK) / Not Green (Replace) with microswitch |
| Dimensions (H × W × D) | Approx. 90 × 36 × 90.4 mm |
| Weight | Approx. 0.27 kg |
It protects low-voltage electrical installations against lightning strikes and transient overvoltages using Type 1+2 surge protection.
The device is designed for use on TT and TNS electrical distribution systems.
The SPD has a maximum continuous operating voltage (Uc) of 320 V AC.
Yes. The K1-2PG320-M includes an integrated microswitch for remote status indication alongside a visual condition indicator.
The unit features a compact pluggable design for straightforward installation onto a standard DIN rail within electrical distribution boards.
Mersen Surge-Trap® K Series surge protection devices are trusted by electrical engineers and contractors worldwide for protecting industrial, commercial and infrastructure electrical systems from damaging surge events.
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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...