Mersen 83230129 STPT23-20K320V-4PGM Type 2+3 surge protection device with 20 kA discharge capacity, 320 V AC continuous operating voltage, 3+1 TT configuration and remote indication.
£134.93
The Mersen 83230129 is a high performance Type 2+3 Surge Protection Device (SPD) designed to protect low voltage electrical installations against transient overvoltages. Part of the Mersen Surge-Trap® Pluggable STPT23 Series, this device provides dependable protection for three-phase plus neutral systems in commercial, industrial and automation environments.
Engineered for DIN rail installation, this pluggable SPD helps safeguard sensitive electrical equipment from voltage spikes caused by lightning activity, switching operations and network disturbances. Its compact modular format allows quick replacement, while the integrated remote indication contact enables simple monitoring of device status.
With a maximum discharge current of 20 kA (8/20 μs), a 320 V AC continuous operating voltage (Uc) and a 3+1 TT configuration, the Mersen 83230129 is ideal for protecting switchboards, machinery panels, PLC systems, drives and industrial control equipment operating on 230/400 V AC or 277/480 V AC electrical systems.
Surge protection devices help divert damaging transient voltages away from connected equipment before they can cause insulation breakdown, electronic failure or costly downtime. Installing an SPD improves system resilience and helps protect valuable automation and electrical infrastructure.
The Mersen Surge-Trap® STPT23 range is designed for low voltage installations requiring compact and reliable final stage surge protection, making it suitable for use in distribution boards, switchboards, control panels and machinery systems.
| Voltage | 480 V |
|---|---|
| Phase | Three Phase |
| Manufacturer | Mersen |
| Series | Surge-Trap® Pluggable STPT23 Series |
| Model | STPT23-20K320V-4PGM |
| SKU | 83230129 |
| Product type | Surge Protection Device (SPD) |
| SPD classification | Type 2+3 / Class II+III |
| Maximum discharge current (Imax) | 20 kA (8/20 μs) |
| Nominal discharge current (In) | 10 kA |
| Combined voltage pulse (Uoc) | 10 kV |
| Continuous operating voltage (Uc) | 320 V AC |
| Nominal operating voltage (Un) | 230/400 V AC, 277/480 V AC |
| System configuration | 3+1 TT |
| Number of poles | 4 |
| Number of modules | 4 |
| Mounting type | DIN rail |
| Format | Pluggable modular device |
| Remote indication | Yes |
| Protection rating | IP20 |
| Standard | EN/IEC 61643-11 |
| RoHS compliant | Yes |
| EAN/UPC | 8435297849315 |
| HS Code | 85363090 |
| Country of Manufacture | Spain |
It is used to protect low voltage electrical installations and connected equipment from transient overvoltages caused by lightning activity, switching events and electrical disturbances.
The Mersen 83230129 is a Type 2+3 / Class II+III surge protection device.
This device has a maximum discharge current of 20 kA (8/20 μs) and a nominal discharge current of 10 kA.
It is designed for 230/400 V AC and 277/480 V AC three-phase plus neutral TT systems using a 3+1 configuration.
Yes. The device includes remote indication, allowing the operational status of the SPD to be monitored from an electrical panel, control system or building management system.
Mersen Surge-Trap® surge protection devices are trusted by electrical engineers, panel builders and maintenance teams to protect critical electrical infrastructure from damaging transient overvoltages.
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2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...