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K1-4P320-M Mersen Surge Protector Type 1+2 SPD 4 Pole 277/480 Volt 20KA TNS Remote Indication
Mersen K1-4P320-M Type 1+2 surge protection device with integrated remote signalling, 320 V AC operating voltage, 4+0 configuration and pluggable DIN rail mounting for TNS 277/480 V AC electrical systems.
£296.65
Why Choose the Mersen 44120413 K1-4P320-M Surge Protection Device?
The Mersen 44120413 K1-4P320-M is a premium Type 1+2 Surge Protection Device (SPD) engineered to protect three-phase low-voltage electrical installations against lightning currents and transient overvoltages. As part of the trusted Mersen Surge-Trap® K - K1 Series, this pluggable SPD combines high surge current capability with integrated remote signalling, making it an excellent choice for industrial, commercial and critical infrastructure installations.
Designed for installation within the main distribution board, the K1-4P320-M features replaceable pluggable protection modules that simplify maintenance and minimise downtime. The integrated microswitch provides remote status monitoring, enabling maintenance personnel to receive immediate notification when replacement cartridges are required without opening the electrical enclosure.
Featuring a 320 V AC maximum continuous operating voltage (Uc), a 4+0 protection configuration and a 12.5 kA lightning impulse current (Iimp), the K1-4P320-M is specifically designed for TNS 277/480 V AC three-phase electrical systems, delivering 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 status monitoring.
- 4+0 protection configuration optimised for TNS systems.
- Pluggable cartridge design enables rapid servicing and replacement.
- Suitable for 277/480 V AC three-phase power distribution systems.
- Protects switchgear, PLCs, drives and sensitive electronic equipment against lightning and transient overvoltages.
Key Features
- Mersen Surge-Trap® K - K1 Series.
- IEC Class I+II / Type 1+2 surge protection device.
- 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).
- 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 K1-4P320-M safely diverts lightning currents and transient overvoltages away from connected electrical equipment before they can damage switchgear, PLCs, motor drives, building management systems and other sensitive electronic devices. This helps minimise costly downtime, reduce maintenance requirements and improve the long-term reliability of power distribution systems.
Its combination of high surge current capability, integrated remote monitoring and pluggable cartridge design makes it an ideal solution for manufacturing facilities, commercial buildings, utilities, renewable energy installations and other mission-critical electrical infrastructure.
Typical Applications
- Main three-phase distribution boards.
- Industrial automation systems.
- Commercial buildings.
- Manufacturing facilities.
- Electrical switchboards.
- Critical infrastructure.
- Renewable energy installations.
- TNS 277/480 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 | 480 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 | K1-4P320-M | |
| Part Number | 44120413 | |
| EAN | 8435297888246 | |
| 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) | 277/480 V AC | |
| Lightning impulse current (Iimp) | 12.5 kA | |
| Nominal Discharge Current (In) | 20 kA | |
| Maximum discharge current (Imax) | 50 kA | |
| Protection modes | L-PE / N-PE | |
| Configuration | TN-S | |
| Number of poles | 4 | |
| System compatibility | TN-S | |
| Protection level (Up) | ≤1.5 kV | |
| Following current (Ifi) | 100 A | |
| 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 +80°C | |
| Housing material | PA6 CT1 & PA66 CT1 | |
| Tightening torque | 3 Nm | |
| Dimensions (H × W × D) | Approx. 90 × 72 × 90 mm | |
| Weight | Approx. 0.66 kg | |
| RoHS compliant | Yes |
Frequently Asked Questions
What is the Mersen 44120413 K1-4P320-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 K1-4P320-M includes an integrated microswitch that allows the operating status of the surge protection device to be monitored remotely.
Which electrical systems is this SPD suitable for?
The device is designed for TNS 277/480 V AC three-phase electrical distribution systems.
What surge current ratings does the device provide?
It provides a 12.5 kA lightning impulse current, 20 kA nominal discharge current and 50 kA maximum discharge current.
How is the K1-4P320-M installed?
The device mounts onto a standard DIN rail and features pluggable replacement cartridges for fast servicing and reduced maintenance downtime.
Trusted Protection for Critical Electrical Systems
Mersen Surge-Trap® K Series surge protection devices are trusted by electrical engineers, panel builders and contractors worldwide to protect critical power distribution systems from lightning strikes and damaging transient overvoltages.
