Why Choose the Mersen 44020111 K2-1P440-M Surge Protection Device?
The Mersen 44020111, also identified as the K2-1P440-M, is a high-performance Type 2 surge protection device (SPD) engineered to protect low-voltage electrical installations from transient overvoltages. As part of the trusted Mersen Surge-Trap K2 series, it delivers dependable protection for commercial, industrial and infrastructure applications where electrical reliability is essential.
Designed with a pluggable protection module, the K2-1P440-M allows quick servicing and cartridge replacement without removing the complete base from the DIN rail. An integrated visual status indicator and built-in remote signalling microswitch enable both local inspection and remote monitoring, helping maintenance personnel quickly identify the operational status of the surge protector.
With a 440 V AC maximum continuous operating voltage, 20 kA nominal discharge current and 50 kA maximum discharge current, the Mersen 44020111 provides effective protection against switching transients and lightning-induced surges. Its compact single-module DIN-rail design makes it ideal for electrical panels, switchboards and industrial control cabinets.
Key Advantages
- Reliable Type 2 surge protection for low-voltage installations.
- 50 kA maximum discharge current for effective transient overvoltage protection.
- 440 V AC maximum continuous operating voltage.
- Integrated remote signalling microswitch for monitoring system status.
- Pluggable cartridge design enables fast maintenance and replacement.
- Compact DIN-rail format suitable for modern distribution boards.
Key Features
- Mersen Surge-Trap K2 series.
- Type 2 / Class II surge protection device.
- Single-pole (1+0) configuration.
- 440 V AC maximum continuous operating voltage.
- 400 V AC nominal operating voltage.
- 20 kA nominal discharge current.
- 50 kA maximum discharge current.
- Visual operating status indicator.
- Integrated remote signalling microswitch.
- Pluggable module with DIN-rail mounting.
Reliable Surge Protection for Industrial Installations
Transient overvoltages generated by switching operations and indirect lightning strikes can damage drives, PLCs, power supplies, communication equipment and other sensitive electronics. Effective surge protection helps minimise downtime, extend equipment life and improve overall system reliability.
The Mersen Surge-Trap K2 range combines high discharge capability with rapid response and advanced thermal disconnection technology. Its pluggable construction and remote indication make routine maintenance straightforward while helping ensure continuous protection of valuable electrical assets.
Typical Applications
- Industrial distribution boards.
- Electrical switchgear and control panels.
- Building management systems.
- Manufacturing and automation equipment.
- Variable speed drives and PLC installations.
- Commercial and infrastructure electrical systems.
