Why Choose the Mersen 83120127 Surge Protection Device?
The Mersen 83120127 STPT12-12K75V-2PM is a compact and reliable Type 1+2 Surge Protection Device (SPD) designed to protect low voltage electrical installations against transient overvoltages caused by lightning activity and switching events. As part of the Mersen Surge-Trap® Pluggable STPT12 Series, it provides dependable first-stage protection for industrial, commercial and specialist low voltage power systems.
This pluggable surge protection device combines Class I and Class II protection in a DIN rail mounted format. Its replaceable cartridge design, visual status indication and integrated remote signalling contact make it suitable for applications where maintenance access, monitoring and long-term reliability are important.
With a 12.5 kA lightning impulse current rating, 60 V nominal operating voltage and 75 V maximum continuous operating voltage, the Mersen 83120127 is ideal for protecting 60 V AC systems, control panels, telecommunications equipment, automation circuits and sensitive electrical devices from damaging voltage surges.
Key Advantages
- Combined Type 1+2 surge protection for low voltage electrical systems.
- 12.5 kA lightning impulse current (Iimp) for robust surge handling.
- 75 V maximum continuous operating voltage for 60 V applications.
- Integrated remote indication for external SPD status monitoring.
- Pluggable cartridge design supports fast maintenance and replacement.
- Compact 2-pole, 2-module DIN rail format.
Key Features
- Mersen Surge-Trap® Pluggable STPT12 Series.
- Type 1+2 / Class I+II surge protection device.
- 12.5 kA Iimp (10/350 μs).
- 50 kA maximum discharge current (Imax 8/20 μs).
- 20 kA nominal discharge current (In 8/20 μs).
- 60 V nominal operating voltage.
- 75 V maximum continuous operating voltage.
- 2-pole configuration for 2+0 TNS systems.
- Remote signalling contact for status monitoring.
- DIN rail mounted IP20 construction.
Reliable Protection Against Electrical Surges
Surge protection devices help protect electrical systems by safely limiting transient overvoltages before they reach connected equipment. This reduces the risk of damage to control systems, switchgear, telecommunications hardware, monitoring devices, power supplies and other sensitive electrical components.
The Mersen STPT12 range is designed for use as the first level of protection in incoming power supply panels and exposed installations. Its Type 1+2 classification makes it suitable for applications requiring coordinated protection against lightning currents and voltage spikes.
Typical Applications
- Low voltage power distribution systems.
- Incoming supply panels.
- Industrial automation and control circuits.
- Telecommunications and signalling systems.
- Monitoring and instrumentation equipment.
- Specialist 60 V AC electrical installations.
