Why Choose the Mersen 83120118 Surge Protection Device?
The Mersen 83120118 STPT12-12K440V-2PG is a robust Type 1+2 surge protection device (SPD) designed to protect low-voltage electrical installations against lightning currents and transient overvoltages. Part of the Mersen Surge-Trap® Pluggable STPT12 Series, it is suitable for incoming supply panels, main distribution boards and systems requiring dependable first-level surge protection.
This device provides combined protection for single-phase plus neutral systems, using a 1+1 TT configuration with L-N and N-PE protection modes. Its compact pluggable construction allows straightforward installation and fast module replacement during maintenance.
With a 12.5 kA lightning impulse current (10/350 μs), 400 V nominal operating voltage (Un) and 440 V L-N maximum continuous operating voltage (Uc), the 83120118 provides reliable protection for industrial, commercial and infrastructure electrical installations.
Key Advantages
- Type 1+2 surge protection device for lightning current and transient overvoltage protection.
- 12.5 kA Iimp (10/350 μs) lightning impulse current rating.
- 50 kA maximum discharge current (8/20 μs).
- 1Ph+N 1+1 TT configuration for single-phase plus neutral systems.
- Compact 2-pole pluggable design for DIN rail installation.
- Suitable as the first level of protection in main distribution boards.
Key Features
- Mersen Surge-Trap® STPT12 Series.
- Catalogue number: 83120118.
- Model: STPT12-12K440V-2PG.
- IEC Type 1+2 / Class I+II surge protection.
- 400 V AC nominal operating voltage (Un).
- 440 V AC maximum continuous operating voltage L-N.
- 255 V AC maximum continuous operating voltage N-PE.
- 2-pole, 2-module pluggable format.
- DIN rail mounting.
- Designed for 1+1 TT single-phase plus neutral configurations.
Reliable Protection Against Transient Overvoltages
Surge protection devices help protect electrical equipment from damaging voltage spikes caused by lightning activity, switching operations and disturbances on the power network. Installing a Type 1+2 SPD at the incoming supply point helps reduce the risk of equipment damage, downtime and disruption to critical electrical systems.
The Mersen STPT12 Series is engineered for low-voltage distribution applications where reliable surge protection, compact installation and straightforward maintenance are required. The pluggable module format allows protection cartridges to be replaced quickly without rewiring the complete assembly.
Typical Applications
- Main electrical distribution boards.
- Incoming power supply panels.
- Single-phase plus neutral electrical systems.
- Commercial building installations.
- Industrial control panels.
- Infrastructure and critical power systems.
