Why Choose the Mersen 83120126 Surge Protection Device?
The Mersen 83120126 STPT12-12K75V-2P is a compact Type 1+2 Surge Protection Device (SPD) designed to protect low voltage electrical installations against transient overvoltages caused by lightning activity and electrical switching events. As part of the Mersen Surge-Trap® Pluggable STPT12 Series, it provides dependable first-stage surge protection for industrial, commercial and specialist power distribution applications.
This pluggable SPD combines Class I and Class II surge protection in a DIN rail mounted format, making it suitable for incoming power supply panels and installations exposed to atmospheric surges. Its replaceable cartridge design helps simplify inspection, maintenance and replacement when required.
With a 12.5 kA lightning impulse current rating, 75 V maximum continuous operating voltage and 2-pole 2+0 TNS configuration, the Mersen 83120126 is ideal for protecting 60 V AC or DC systems, control circuits, distribution equipment 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.
- Pluggable cartridge design supports quick replacement and maintenance.
- Compact 2-pole, 2-module DIN rail format.
- Suitable for specialist low voltage power, control and distribution systems.
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 AC or DC nominal operating voltage.
- 75 V maximum continuous operating voltage.
- 2-pole configuration for 2+0 TNS systems.
- 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, 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 surges.
Typical Applications
- Low voltage power distribution systems.
- Incoming supply panels.
- Industrial control circuits.
- Automation and monitoring equipment.
- Telecommunications and signalling systems.
- Specialist 60 V AC or DC electrical installations.
