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K1-3P275-M Mersen Surge Protector Type 1+2 SPD 3 Pole 400 Volt 20KA TNC Remote Indication
Mersen K1-3P275-M Type 1+2 surge protection device with 275 V AC operating voltage, integrated remote signalling, 12.5 kA lightning impulse current and pluggable DIN rail design for TNC three-phase electrical systems.
£208.15
Why Choose the Mersen 44120301 K1-3P275-M Surge Protection Device?
The Mersen 44120301 K1-3P275-M is a high-performance Type 1+2 Surge Protection Device (SPD) designed to protect three-phase low-voltage electrical installations from lightning strikes and transient overvoltages. As part of the proven Mersen Surge-Trap® K - K1 Series, this pluggable SPD combines excellent surge protection with integrated remote signalling, making it ideal for industrial, commercial and critical infrastructure applications.
Designed for installation within the main distribution board, the K1-3P275-M provides reliable first-stage protection against high-energy surge events while helping minimise downtime and equipment damage. Its compact DIN rail mounted design and pluggable construction simplify installation and maintenance, whilst the integrated microswitch enables convenient remote monitoring of device status.
With a 275 V AC maximum continuous operating voltage (Uc), 3+0 protection configuration, 12.5 kA lightning impulse current (Iimp) and an integrated remote indication contact, the K1-3P275-M is ideally suited for TNC 230/400 V AC electrical systems requiring dependable surge protection.
Key Advantages
- Reliable Type 1+2 surge protection for three-phase low-voltage installations.
- Integrated remote signalling microswitch for continuous device monitoring.
- Pluggable cartridge design enables rapid maintenance and replacement.
- Designed specifically for TNC three-phase electrical systems.
- Compact DIN rail mounted housing saves valuable panel space.
- Protects electrical equipment against lightning strikes and switching surges.
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).
- 3-pole, 3+0 protection configuration.
- Integrated remote signalling microswitch.
- Green (OK) / Not Green (Replace) status indication.
- Compact pluggable DIN rail mounted housing.
Reliable Protection Against Electrical Surges
The Mersen K1-3P275-M safely diverts high-energy surge currents away from connected equipment before they can damage drives, switchgear, motors and sensitive electronic systems. This helps reduce maintenance costs, minimise downtime and improve the reliability of electrical installations.
Its high surge handling capability, integrated remote monitoring and compact pluggable construction make it an excellent solution for industrial control panels, manufacturing plants, commercial buildings and infrastructure projects where continuous protection is essential.
Typical Applications
- Main three-phase distribution boards.
- Industrial control panels.
- Manufacturing facilities.
- Commercial buildings.
- Infrastructure projects.
- Electrical switchboards.
- Water treatment plants.
- Three-phase power distribution 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 | 3-pole | |
| Device Type | Surge protection device | |
| Earthing System | TN-C | |
| Nominal Discharge Current (In) | 20 kA | |
| Remote Signal | Yes | |
| Manufacturer | Mersen | |
| Series | Surge-Trap® K - K1 Series | |
| Model | K1-3P275-M | |
| Part Number | 44120301 | |
| 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-C | |
| Number of poles | 3 | |
| System compatibility | TN-C | |
| Protection level (Up) | ≤1.5 kV | |
| Mounting type | DIN rail | |
| Format | Pluggable | |
| Indication | Green (OK) / Not Green (Replace) with microswitch | |
| Protection rating | IP20 | |
| Dimensions (H × W × D) | Approx. 90 × 54 × 90 mm | |
| Weight | Approx. 0.50 kg |
Frequently Asked Questions
What is the Mersen 44120301 K1-3P275-M used for?
It provides Type 1+2 surge protection for three-phase low-voltage electrical installations against lightning strikes and transient overvoltages.
Does this model include remote monitoring?
Yes. The K1-3P275-M includes an integrated microswitch that provides remote signalling of the surge protection device status.
Which electrical systems is this SPD suitable for?
The device is designed for TNC 230/400 V AC three-phase electrical distribution systems.
What surge current ratings does the device provide?
The SPD features a 12.5 kA lightning impulse current, 20 kA nominal discharge current and 50 kA maximum discharge current.
How is the surge protection device installed?
The K1-3P275-M is supplied in a pluggable housing for installation onto a standard DIN rail inside a main electrical distribution board.
Trusted Protection for Three-Phase Electrical Installations
Mersen Surge-Trap® K Series surge protection devices are trusted worldwide by electrical engineers and contractors for protecting three-phase electrical systems against lightning strikes and transient overvoltages.
