Why Choose the Mersen 44020412 K2-4P320 Surge Protection Device?
The Mersen 44020412, also known as the K2-4P320, is a high-performance Type 2 surge protection device (SPD) engineered to protect low-voltage electrical installations from transient overvoltages caused by indirect lightning strikes and electrical switching events. As part of the Mersen Surge-Trap® K2 Series, this pluggable four-pole SPD is specifically designed for 277/480 V AC TNS electrical systems.
Featuring a 4+0 protection configuration, the K2-4P320 provides dedicated protection for each live conductor, making it an excellent choice for industrial switchboards, motor control centres, automation systems and commercial electrical distribution panels. With a 20 kA nominal discharge current and a 50 kA maximum discharge current, it delivers reliable protection for sensitive electrical and electronic equipment.
Its reinforced pluggable design enables fast replacement of protection cartridges while maintaining the DIN rail base in position. An integrated visual status indicator allows maintenance personnel to quickly verify the condition of the device, helping reduce downtime and ensuring continuous surge protection.
Key Advantages
- Reliable Type 2 surge protection for industrial and commercial installations.
- 50 kA maximum discharge current provides excellent surge handling capability.
- 20 kA nominal discharge current ensures dependable transient protection.
- 4+0 protection configuration for comprehensive conductor protection.
- Designed specifically for 277/480 V AC TNS networks.
- Pluggable cartridges simplify maintenance and replacement.
- Visual operational status indication enables quick inspections.
- Compact DIN rail mounting simplifies installation.
Key Features
- Mersen Surge-Trap® K2 Series.
- Type 2 / IEC Class II surge protection device.
- UL Type 1 Component Assembly.
- Four-pole 4+0 configuration.
- 277/480 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).
- Voltage protection level ≤1.5 kV.
- Dynamic thermal disconnection with open-circuit failure mode.
- Visual operational status indicator.
- Pluggable DIN rail construction.
Reliable Protection for 277/480 V TNS Systems
Electrical installations are exposed to damaging transient overvoltages generated by lightning activity, switching operations and utility disturbances. The Mersen K2-4P320 safely diverts surge energy away from connected equipment, helping reduce costly downtime and extending the operational life of valuable electrical assets.
Its dedicated 4+0 architecture provides individual protection for each conductor within TNS systems, making it ideal for industrial control panels, commercial switchboards, manufacturing facilities and critical electrical infrastructure requiring dependable surge protection.
Typical Applications
- Industrial electrical distribution boards.
- Commercial switchboards.
- Motor control centres.
- Automation and PLC control panels.
- Manufacturing facilities.
- Building services installations.
- HVAC control systems.
- 277/480 V AC TNS electrical networks.
