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Mersen Surge Protector Type 1+2 SPD 2 Pole 230/400 Volt 20KA IT/TNS
Mersen STPT12-12K440V-2P Type 1+2 pluggable surge protection device with 12.5 kA lightning impulse current, 440 V maximum continuous operating voltage, 2 pole 2+0 IT/TNS configuration and DIN rail mounting.
£126.38
Why Choose the Mersen 83120124 Surge Protection Device?
The Mersen 83120124 STPT12-12K440V-2P is a high-performance 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 infrastructure power distribution systems.
This compact pluggable SPD combines Class I and Class II surge protection in one DIN rail mounted device, making it suitable for incoming power supply panels and installations exposed to atmospheric surges. Its replaceable cartridge format and clear status indication help simplify inspection, maintenance and replacement when required.
With a 12.5 kA lightning impulse current rating, 440 V maximum continuous operating voltage and 2-pole 2+0 IT/TNS configuration, the Mersen 83120124 is ideal for protecting electrical equipment, distribution boards, control panels and sensitive industrial systems from damaging voltage surges.
Key Advantages
- Combined Type 1+2 surge protection for low voltage installations.
- 12.5 kA lightning impulse current (Iimp) for robust surge handling.
- 440 V maximum continuous operating voltage for IT and TNS systems.
- Pluggable cartridge design supports fast replacement and maintenance.
- Compact 2-pole, 2-module DIN rail format.
- Suitable for incoming panels, industrial distribution boards and exposed installations.
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).
- 440 V maximum continuous operating voltage.
- 2-pole configuration for 2+0 IT/TNS systems.
- Pluggable protection module for simplified maintenance.
- DIN rail mounted IP20 design.
Reliable Protection Against Electrical Surges
Surge protection devices help protect electrical installations by safely diverting transient overvoltages before they reach connected equipment. This reduces the risk of damage to control systems, switchgear, drives, automation hardware and other sensitive electrical components.
The Mersen STPT12 range is designed for use as the first level of surge protection in installations where lightning exposure and switching surges may occur. Its Type 1+2 classification makes it suitable for incoming distribution panels and applications requiring coordinated surge protection.
Typical Applications
- Main low voltage distribution boards.
- Incoming power supply panels.
- Industrial automation systems.
- Commercial building electrical installations.
- Control panels and switchboards.
- Infrastructure, utilities and exposed electrical networks.
Technical Specifications
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| Impulse Current Iimp (kA) | 12.5 kA | |
|---|---|---|
| Voltage | 400 V | |
| Phase | Single Phase | |
| Poles | 2-pole | |
| Device Type | Surge protection device | |
| SPD Type | Type 1+2 | |
| Earthing System | IT, TN-S | |
| Manufacturer | Mersen | |
| Series | Surge-Trap® Pluggable STPT12 | |
| Model | STPT12-12K440V-2P | |
| SKU | 83120124 | |
| Product type | Type 1+2 Surge Protection Device | |
| IEC classification | Class I+II | |
| Lightning impulse current (Iimp) | 12.5 kA (10/350 μs) | |
| Maximum discharge current (Imax) | 50 kA (8/20 μs) | |
| Maximum continuous operating voltage (Uc) | 440 V | |
| Nominal operating voltage | 400 V AC | |
| System configuration | 2+0 IT / TNS | |
| Number of poles | 2 | |
| Number of modules | 2 | |
| Mounting type | 35 mm DIN rail | |
| Protection rating | IP20 | |
| Format | Pluggable | |
| Dimensions (W × H × D) | approx. 41 × 90 × 117 mm | |
| Weight | approx. 0.345 kg | |
| HS Code | 85363090 | |
| Country of Manufacture | Spain |
Frequently Asked Questions
What is the Mersen 83120124 used for?
It is used to protect low voltage electrical installations against transient overvoltages caused by lightning and switching events.
What type of surge protection does this device provide?
The Mersen 83120124 provides combined Type 1+2 / Class I+II surge protection.
What is the maximum continuous operating voltage?
The device has a 440 V maximum continuous operating voltage.
Is the Mersen 83120124 pluggable?
Yes. It uses a pluggable cartridge design, allowing the protection module to be replaced quickly when required.
Where is this SPD typically installed?
It is typically installed on a DIN rail inside incoming distribution boards, switchboards or main electrical panels.
Trusted for Critical Power Protection
Mersen Surge-Trap® surge protection devices are trusted by electrical engineers, panel builders and industrial facilities worldwide for reliable protection of power distribution systems and sensitive electrical equipment.
