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K1-2PG320-M Mersen Surge Protector Type 1+2 SPD 2 Pole 277 Volt 20KA TT Remote Indication
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.
£135.93
Why Choose the Mersen 44120209 K1-2PG320-M Surge Protection Device?
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.
Key Advantages
- Reliable Type 1+2 surge protection for low-voltage installations.
- Pluggable design simplifies maintenance and replacement.
- Integrated remote signalling microswitch for status monitoring.
- Suitable for TT and TNS network configurations.
- DIN rail mounting for fast installation.
- Protects electrical equipment from lightning and transient overvoltages.
Key Features
- Mersen Surge-Trap® K - K1 Series.
- IEC Class I+II / Type 1+2 SPD.
- 320 V AC maximum continuous operating voltage (Uc).
- 12.5 kA lightning impulse current (Iimp).
- 20 kA nominal discharge current (In).
- 50 kA maximum discharge current (Imax).
- 2-pole, 1+1 configuration.
- Visual status indication and remote microswitch.
- Compact DIN rail mounted housing.
Reliable Protection Against Electrical Surges
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.
Typical Applications
- Main low-voltage distribution boards.
- Industrial control panels.
- Commercial buildings.
- Renewable energy installations.
- EV charging infrastructure.
- Water treatment facilities.
- Telecommunications equipment.
- Outdoor LED lighting installations.
Technical Specifications
Tick the specs you need, then view products that match.
| Impulse Current Iimp (kA) | 12.5 kA | |
|---|---|---|
| SPD Type | Type 1+2 | |
| Voltage | 277 V | |
| Poles | 2-pole | |
| Device Type | Surge protection device | |
| Earthing System | TN-S, TT | |
| Nominal Discharge Current (In) | 20 kA | |
| Remote Signal | Yes | |
| 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 | TN-S, TT | |
| Number of poles | 2 | |
| System compatibility | TN-S, TT | |
| 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 |
Frequently Asked Questions
What is the Mersen 44120209 K1-2PG320-M used for?
It protects low-voltage electrical installations against lightning strikes and transient overvoltages using Type 1+2 surge protection.
What electrical systems is this SPD compatible with?
The device is designed for use on TT and TNS electrical distribution systems.
What is the maximum continuous operating voltage?
The SPD has a maximum continuous operating voltage (Uc) of 320 V AC.
Does this model include remote signalling?
Yes. The K1-2PG320-M includes an integrated microswitch for remote status indication alongside a visual condition indicator.
How is the device installed?
The unit features a compact pluggable design for straightforward installation onto a standard DIN rail within electrical distribution boards.
Trusted Protection for Critical Electrical Installations
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.
