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K1-4P275-M Mersen Surge Protector Type 1+2 SPD 4 Pole 230/400 Volt 20KA TNS Remote Indication
Mersen K1-4P275-M Type 1+2 surge protection device with integrated remote signalling, 275 V AC operating voltage, 4+0 configuration and pluggable DIN rail mounting for TNS 230/400 V AC electrical systems.
£274.68
Why Choose the Mersen 44120405 K1-4P275-M Surge Protection Device?
The Mersen 44120405 K1-4P275-M is a premium Type 1+2 Surge Protection Device (SPD) designed to protect three-phase low-voltage electrical installations against lightning currents and transient overvoltages. Part of the trusted Mersen Surge-Trap® K - K1 Series, this pluggable SPD combines high surge protection performance with integrated remote signalling, making it an ideal solution for industrial, commercial and critical infrastructure applications.
Designed for installation within the main distribution board, the K1-4P275-M features replaceable pluggable protection modules that simplify maintenance and minimise downtime. The integrated microswitch provides remote status monitoring, allowing maintenance teams to receive indication when the SPD requires replacement without opening the enclosure.
Featuring a 275 V AC maximum continuous operating voltage (Uc), a 4+0 protection configuration and a 12.5 kA lightning impulse current (Iimp), the K1-4P275-M is specifically designed for TNS 230/400 V AC three-phase electrical systems, providing dependable protection against direct lightning strikes and switching surges.
Key Advantages
- High-performance Type 1+2 surge protection for three-phase electrical installations.
- Integrated remote signalling microswitch for continuous device monitoring.
- 4+0 protection configuration designed specifically for TNS systems.
- Pluggable cartridge design enables rapid servicing and replacement.
- Compact DIN rail mounted construction saves enclosure space.
- Protects switchgear, PLCs, drives and sensitive electronic equipment from lightning and transient overvoltages.
Key Features
- Mersen Surge-Trap® K - K1 Series.
- IEC Class I+II / Type 1+2 surge protection device.
- 275 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).
- Four-pole 4+0 protection configuration.
- Integrated remote indication microswitch.
- Green (OK) / Not Green (Replace) visual status indication.
- Compact pluggable DIN rail mounted construction.
Reliable Protection Against Electrical Surges
The Mersen K1-4P275-M safely diverts damaging lightning currents and transient overvoltages away from connected equipment before they can affect switchgear, PLCs, motor drives, automation systems and other sensitive electrical devices. This helps minimise downtime, reduce maintenance costs and improve the reliability of electrical installations.
Its combination of high surge current capability, integrated remote monitoring and replaceable pluggable cartridges makes it particularly suitable for industrial facilities, commercial buildings, utilities and other critical power distribution systems where continuous protection is essential.
Typical Applications
- Main three-phase distribution boards.
- Industrial automation systems.
- Commercial buildings.
- Manufacturing facilities.
- Electrical switchboards.
- Infrastructure projects.
- Water treatment plants.
- TNS 230/400 V AC three-phase electrical systems.
Technical Specifications
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| Impulse Current Iimp (kA) | 12.5 kA | |
|---|---|---|
| SPD Type | Type 1+2 | |
| Voltage | 400 V | |
| Phase | Three Phase | |
| Poles | 4-pole | |
| Device Type | Surge protection device | |
| Earthing System | TN-S | |
| Nominal Discharge Current (In) | 20 kA | |
| Remote Signal | Yes | |
| Manufacturer | Mersen | |
| Series | Surge-Trap® K - K1 Series | |
| Model | K1-4P275-M | |
| Part Number | 44120405 | |
| EAN | 8435297888215 | |
| 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) | 275 V AC | |
| Nominal operating voltage (Un) | 230/400 V AC | |
| Lightning impulse current (Iimp) | 12.5 kA | |
| Nominal Discharge Current (In) | 20 kA | |
| Maximum discharge current (Imax) | 50 kA | |
| Configuration | TN-S | |
| Number of poles | 4 | |
| System compatibility | TN-S | |
| Protection modes | L-PE / N-PE | |
| Protection level (Up) | ≤1.5 kV | |
| Rated short-circuit withstand (ISCCR) | 25 kA | |
| Maximum back-up fuse | 315 A gG | |
| Remote indication | Integrated microswitch | |
| Mounting type | DIN rail | |
| Format | Pluggable | |
| Protection rating | IP20 | |
| Operating temperature | -40°C to +85°C | |
| Housing material | PA6 CT1 & PA66 CT1 | |
| Tightening torque | 3 Nm | |
| Dimensions (H × W × D) | Approx. 90 × 72 × 90 mm | |
| Weight | Approx. 0.65 kg | |
| RoHS compliant | Yes |
Frequently Asked Questions
What is the Mersen 44120405 K1-4P275-M used for?
It provides Type 1+2 surge protection for three-phase electrical installations against lightning currents, switching surges and transient overvoltages.
Does this model include remote monitoring?
Yes. The K1-4P275-M features an integrated microswitch that allows the status of the surge protection device to be monitored remotely.
Which electrical systems is this SPD suitable for?
The device is designed for TNS 230/400 V AC three-phase electrical distribution systems.
What surge current ratings does the device provide?
The SPD provides a 12.5 kA lightning impulse current, a 20 kA nominal discharge current and a 50 kA maximum discharge current.
How is the K1-4P275-M installed?
The surge protection device mounts onto a standard DIN rail inside the main electrical distribution board and features replaceable pluggable cartridges for fast servicing.
Trusted Protection for Critical Electrical Systems
Mersen Surge-Trap® K Series surge protection devices are trusted by electrical engineers and panel builders worldwide to deliver dependable protection against lightning strikes and transient overvoltages in critical power distribution systems.
