Mersen STPT12-12K320V-4PM Type 1+2 surge protection device with 12.5 kA lightning impulse current rating, 320 V UC and remote indication for 277/480 V AC three-phase plus neutral TNS systems.
£395.53
The Mersen 83120147 STPT12-12K320V-4PM is a high-performance Type 1+2 Surge Protection Device (SPD) designed to protect low-voltage electrical installations from lightning currents and transient overvoltages. Built for industrial, commercial and infrastructure applications, it helps protect sensitive electrical equipment, control panels and power distribution systems from damaging surge events.
Part of the trusted Mersen Surge-Trap® STPT12 Series, this DIN rail mounted pluggable surge protection device provides combined Class I+II protection in a compact modular format. The remote indication feature allows device status to be monitored from a control system or signalling circuit, supporting easier maintenance and faster fault identification.
Designed for 277/480 V AC three-phase plus neutral (3Ph+N) electrical systems in a 4+0 TNS configuration, the STPT12-12K320V-4PM provides a 12.5 kA Iimp (10/350 μs) lightning impulse current rating per pole. Its 320 V UC maximum continuous operating voltage makes it suitable for higher voltage three-phase installations requiring dependable first-stage surge protection.
Surge protection devices reduce the risk of equipment damage caused by lightning strikes, switching operations and transient overvoltage events. Installing a Type 1+2 SPD at the incoming distribution board provides a robust first line of defence for downstream electrical equipment and control systems.
The Mersen STPT12 series is designed for demanding electrical environments, offering dependable surge protection for switchboards, automation systems, industrial machinery, commercial facilities and infrastructure installations where operational continuity is essential.
| Voltage | 480 V |
|---|---|
| Phase | Three Phase |
| Manufacturer | Mersen |
| Series | Surge-Trap® STPT12 |
| Model | STPT12-12K320V-4PM |
| Part number | 83120147 |
| Product type | Type 1+2 Surge Protection Device |
| IEC classification | Class I+II |
| Nominal operating voltage (Un) | 277/480 V AC |
| Maximum continuous operating voltage (Uc) | 320 V AC |
| System configuration | 3Ph+N, 4+0 TNS |
| Lightning impulse current (Iimp) | 12.5 kA (10/350 μs) |
| Maximum discharge current (Imax) | 50 kA (8/20 μs) |
| Nominal discharge current (In) | 20 kA (8/20 μs) |
| Short circuit withstand (ISCCR) | 25 kA |
| Number of poles | 4 |
| Number of modules | 4 |
| Mounting type | DIN rail |
| Format | Pluggable |
| Remote indication | Yes |
| Protection rating | IP20 |
| Standards | EN 61643-11 / IEC 61643-11 |
| RoHS compliant | Yes |
| HS Code | 85363090 |
| Country of Manufacture | Spain |
It is used to protect low-voltage electrical installations against lightning currents and transient overvoltages.
The 83120147 is a Type 1+2 / Class I+II surge protection device designed for both lightning current discharge and transient overvoltage protection.
It is designed for 277/480 V AC three-phase plus neutral (3Ph+N) systems using a 4+0 TNS configuration.
Yes. The STPT12-12K320V-4PM includes remote indication for monitoring the status of the surge protection device.
It is typically installed in the main incoming distribution board as the first stage of surge protection for the electrical installation.
Mersen Surge-Trap® surge protection devices are trusted by electrical engineers, panel builders and industrial facilities worldwide to provide dependable protection against lightning currents, switching surges and transient overvoltages.
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