Why Choose the Mersen 44020211 K2-2P320-M Surge Protection Device?
The Mersen 44020211, also identified as the K2-2P320-M, is a premium Type 2 surge protection device (SPD) engineered to protect single-phase low-voltage electrical installations from transient overvoltages. Part of the trusted Mersen Surge-Trap K2 series, it provides reliable protection for 277 V TN-S electrical systems while incorporating an integrated remote signalling contact for continuous status monitoring.
Designed with a pluggable construction, the K2-2P320-M allows protection cartridges to be replaced quickly without removing the complete DIN-rail base. A highly visible mechanical status indicator clearly displays the operating condition, whilst the built-in microswitch enables remote monitoring through PLCs, SCADA systems and building management systems, making it ideal for mission-critical installations.
Featuring a 277 V AC nominal operating voltage, 320 V AC maximum continuous operating voltage, 20 kA nominal discharge current and 50 kA maximum discharge current, the Mersen 44020211 delivers dependable protection against lightning-induced surges and switching transients. Its compact two-module DIN-rail design enables straightforward installation within commercial and industrial electrical distribution systems.
Key Advantages
- Reliable Type 2 surge protection for 277 V TN-S electrical installations.
- Integrated remote signalling microswitch for continuous condition monitoring.
- 50 kA maximum discharge current for excellent surge protection performance.
- Pluggable cartridge design enables rapid servicing and replacement.
- Visual operating status indicator simplifies routine inspections.
- Compact DIN-rail mounting saves valuable enclosure space.
Key Features
- Mersen Surge-Trap K2 series.
- Type 2 / Class II surge protection device.
- 2+0 internal configuration.
- Two-pole design.
- 277 V AC nominal operating voltage.
- 320 V AC maximum continuous operating voltage (Uc).
- 20 kA nominal discharge current (In).
- 50 kA maximum discharge current (Imax).
- Protection modes: L-PE / N-PE.
- Integrated visual indication and remote signalling microswitch.
- Dynamic thermal disconnection technology.
- Compact pluggable DIN-rail construction.
Reliable Surge Protection with Remote Monitoring
Transient overvoltages caused by indirect lightning strikes, utility switching and inductive electrical loads can damage PLCs, variable speed drives, communication equipment, power supplies and other critical electronics. Installing a dedicated Type 2 SPD significantly reduces the likelihood of equipment damage, production downtime and costly repairs.
The Mersen K2-2P320-M combines high surge handling capability with integrated remote signalling, enabling maintenance personnel to monitor protection status from central control systems whilst benefiting from fast replacement of the pluggable protection module whenever servicing is required.
Typical Applications
- 277 V TN-S distribution boards.
- Industrial switchgear and motor control centres.
- Commercial electrical installations.
- PLC and automation control panels.
- Building management systems (BMS).
- Protection of drives, power supplies and sensitive electronic equipment.
