Why Choose the Mersen 44020408 K2-4PG320 Surge Protection Device?
The Mersen 44020408, also known as the K2-4PG320, is a high-performance Type 2 surge protection device (SPD) engineered to safeguard low-voltage electrical installations against transient overvoltages caused by lightning activity and switching events. Part of the trusted Mersen Surge-Trap® K2 Series, this four-pole SPD is designed for reliable protection of three-phase power distribution systems operating on 277/480 V AC networks.
With a 20 kA nominal discharge current and a 50 kA maximum discharge current, the K2-4PG320 delivers dependable protection for electrical panels, industrial machinery, commercial buildings and critical infrastructure. Its pluggable construction enables rapid replacement of protection modules while reducing maintenance time and system downtime.
Designed with a 3+1 protection configuration, the device provides effective L-N and N-PE protection for TT and TNS earthing systems. The integrated visual status indicator allows maintenance personnel to verify operational status at a glance, ensuring continued protection of valuable electrical equipment.
Key Advantages
- High-performance Type 2 surge protection for industrial and commercial installations.
- 50 kA maximum discharge current for excellent surge handling capability.
- 20 kA nominal discharge current for reliable transient protection.
- 277/480 V AC nominal operating voltage.
- 3+1 protection configuration for TT and TNS systems.
- Pluggable cartridges simplify servicing and maintenance.
- Visual status indicator enables quick condition monitoring.
- Compact DIN rail mounting for easy installation.
Key Features
- Mersen Surge-Trap® K2 Series.
- Type 2 / IEC Class II surge protection device.
- Four-pole 3+1 configuration.
- 277/480 V AC nominal operating voltage.
- 320 V AC maximum continuous operating voltage (L-N).
- 20 kA nominal discharge current (In).
- 50 kA maximum discharge current (Imax).
- Voltage protection level ≤1.5 kV.
- Green operational status indicator.
- Pluggable modules with DIN rail mounting.
Reliable Protection for Three-Phase Power Systems
Voltage transients generated by indirect lightning strikes, utility switching and large inductive loads can damage automation equipment, control panels, drives and other sensitive electrical systems. The Mersen K2-4PG320 safely diverts surge currents away from connected equipment, reducing the risk of costly failures and downtime.
Its compact pluggable design makes installation and maintenance straightforward, while the robust construction ensures long service life in demanding industrial and commercial environments.
Typical Applications
- Industrial distribution boards.
- Commercial electrical installations.
- Manufacturing facilities.
- Motor control centres.
- Building services and HVAC systems.
- Process automation equipment.
- Critical infrastructure installations.
- Electrical panels operating on 277/480 V AC systems.
