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K2-4PG275-M Mersen Surge Protector Type 2 SPD 4 Pole 230/400 Volt 20KA TT Remote Indication
Mersen 44020401 K2-4PG275-M four-pole Type 2 surge protection device for 230/400 V AC TT and TNS systems, featuring a 20 kA nominal discharge current, 50 kA maximum discharge current and remote status indication.
£122.96
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.
Technical Specifications
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| Voltage | 400 V | |
|---|---|---|
| Phase | Three Phase | |
| Poles | 4-pole | |
| Device Type | Surge protection device | |
| SPD Type | Type 2 | |
| Earthing System | TN-S, TT | |
| Nominal Discharge Current (In) | 20 kA | |
| Remote Signal | Yes | |
| Manufacturer | Mersen | |
| Series | Surge-Trap® K2 Series | |
| Model | K2-4PG275-M | |
| Manufacturer part number | 44020401 | |
| EAN | 8435297884149 | |
| Product type | Surge protection device | |
| IEC SPD classification | Type 2 / Class II | |
| UL SPD classification | Type 1 Component Assembly | |
| Protection configuration | 3+1 | |
| Nominal operating voltage | 230/400 V AC | |
| Maximum continuous operating voltage, L-N | 275 V AC | |
| Maximum continuous operating voltage, N-PE | 255 V AC | |
| Nominal frequency | 50 / 60 Hz | |
| Nominal Discharge Current (In) | 20 kA | |
| Maximum discharge current, Imax | 50 kA | |
| Voltage protection level, L-N | ≤1.5 kV | |
| Voltage protection level, N-PE | ≤1.5 kV | |
| Voltage protection level, L-PE | ≤1.8 kV | |
| Voltage protection rating, L-L | 1,800 V | |
| Voltage protection rating, L-N | 1,000 V | |
| Voltage protection rating, L-G | 1,500 V | |
| Voltage protection rating, N-G | 900 V | |
| Protection modes | L-N / N-PE | |
| System configuration | TN-S, TT | |
| Number of poles | 4 | |
| Following current | 100 A | |
| Maximum back-up fuse | 315 A gG | |
| Remote indication | Integrated microswitch | |
| Remote contact rating | 250 V AC at 0.5 A / 30 V DC at 1 A | |
| Status indication | Green operational / not green replace | |
| Protection rating | IP20 | |
| Mounting type | DIN rail | |
| Connection torque | 3 N·m | |
| Solid conductor capacity | 1.5–35 mm² | |
| Stranded conductor capacity | 1.5–25 mm² | |
| Operating temperature | -40 to +85 °C | |
| Maximum operating altitude | 4,000 m | |
| Housing material | PA6 CT1 and PA66 CT1 | |
| Flammability rating | UL94 V-0 | |
| Dimensions (H × W × D) | 90 × 72 × 74.4 mm | |
| Weight | approx. 0.432 kg | |
| RoHS compliant | Yes | |
| HS Code | 85363090 | |
| Country of Manufacture | Spain |
Frequently Asked Questions
What is the Mersen 44020401 used for?
The Mersen 44020401 is a Type 2 surge protection device used to protect three-phase low-voltage electrical systems and connected equipment against transient overvoltages and induced lightning surges.
What is the maximum discharge current of the K2-4PG275-M?
The device has a maximum discharge current of 50 kA and a nominal discharge current of 20 kA using an 8/20 µs waveform.
What does the remote indication function do?
The integrated microswitch provides a remote electrical signal indicating the condition of the surge protector. It can be connected to an alarm, controller or building management system for remote monitoring.
Which electrical systems are compatible with this SPD?
The Mersen K2-4PG275-M is designed for 230/400 V AC TT and TNS systems and uses a four-pole 3+1 configuration with L-N and N-PE protection modes.
Can the protection cartridges be replaced?
Yes. The device uses pluggable surge protection cartridges, allowing individual modules to be inspected and replaced without changing the complete DIN rail base assembly.
Trusted Surge Protection from Mersen
Mersen Surge-Trap® protection devices are engineered to support electrical safety, equipment reliability and service continuity across demanding commercial, industrial and infrastructure installations.
