Why Choose the Mersen 44020401 K2-4PG275-M Surge Protection Device?
The Mersen 44020401, also known as the K2-4PG275-M, is a high-performance Type 2 surge protection device (SPD) designed to protect low-voltage electrical installations against transient overvoltages and induced lightning surges. As part of the advanced Mersen Surge-Trap® K2 Series, this four-pole surge arrester delivers reliable protection for sensitive equipment connected to three-phase power distribution systems.
Featuring a 3+1 protection configuration, the Mersen K2-4PG275-M provides L-N and N-PE surge protection for TT and TNS electrical networks. It has a nominal discharge current of 20 kA and a maximum discharge current of 50 kA, enabling it to safely divert powerful transient currents away from connected machinery, control systems and electronic equipment.
The device is designed for 230/400 V AC installations and has a maximum continuous operating voltage of 275 V AC between line and neutral. Its pluggable protection modules simplify maintenance, while integrated visual and remote indication functions allow the operating status of the SPD to be monitored locally or through a building management and control system.
Key Advantages
- Dependable Type 2 surge protection for three-phase electrical systems.
- 50 kA maximum discharge current for robust transient overvoltage protection.
- 20 kA nominal discharge current using an 8/20 µs waveform.
- Four-pole 3+1 configuration for L-N and N-PE protection.
- Integrated remote indication microswitch for external status monitoring.
- Pluggable protection modules support quick inspection and replacement.
- Visual status indication provides clear end-of-life monitoring.
- Compact DIN rail format simplifies control-panel installation.
Key Features
- Mersen Surge-Trap® K2 Series.
- Type 2 / IEC Class II surge protection device.
- Four-pole 3+1 protection configuration.
- 230/400 V AC nominal operating voltage.
- 275 V AC maximum continuous operating voltage between line and neutral.
- 50 kA maximum discharge current.
- 20 kA nominal discharge current.
- L-N and N-PE protection modes for TT and TNS systems.
- Remote alarm contact for electrical status indication.
- Green visual status indicator for operational monitoring.
- Pluggable cartridges for simplified servicing.
- DIN rail mounting for electrical distribution boards.
Surge Protection with Remote Status Monitoring
Transient overvoltages caused by indirect lightning strikes, utility network disturbances and the switching of inductive loads can damage sensitive electronic equipment. The Mersen 44020401 limits these voltage spikes by diverting surge energy away from connected machinery, control equipment and electrical distribution components.
Unlike the standard K2-4PG275 model, the K2-4PG275-M includes an integrated microswitch for remote indication. This contact can be connected to a building management system, alarm circuit or industrial controller, allowing maintenance teams to monitor the condition of the surge protection device without inspecting the distribution board manually.
Typical Applications
- Commercial and industrial distribution boards.
- Three-phase electrical control panels.
- Building management and remote monitoring systems.
- Manufacturing and process automation equipment.
- Machinery control and production systems.
- Data centres and telecommunications installations.
- Renewable energy and infrastructure systems.
- Electrical installations requiring Type 2 surge protection.
