Mersen STPT2-40K440V-2PM Type 2 surge protection device featuring 40 kA maximum discharge current, 440 V AC maximum continuous operating voltage, pluggable DIN rail construction and remote indication for industrial electrical installations.
£86.75
The Mersen STPT2-40K440V-2PM (Part Number 83020127) is a high-performance Type 2 surge protection device (SPD) engineered to protect low-voltage electrical installations from transient overvoltages caused by lightning activity and electrical switching events. As part of the Mersen Surge-Trap® Pluggable STPT2 Series, it provides dependable protection for industrial, commercial and infrastructure electrical systems.
Designed with a 40 kA maximum discharge current (Imax), pluggable modular construction and an integrated remote indication contact, this SPD allows rapid maintenance while enabling continuous monitoring of device status through external control or building management systems.
Suitable for 230 V IT and 400 V TNS electrical systems, the STPT2-40K440V-2PM features a compact 2-pole DIN rail mounted design, making it ideal for protecting control panels, distribution boards, automation equipment and critical electrical infrastructure.
Type 2 surge protection devices help prevent damage to electrical equipment by safely diverting transient overvoltages generated by lightning activity and electrical switching events. This reduces downtime, extends equipment life and improves the reliability of critical electrical systems.
The Mersen Surge-Trap® STPT2 Series combines high surge capacity with pluggable cartridges and integrated remote monitoring, making it ideal for installations where preventative maintenance and system availability are essential.
| Voltage | 400 V |
|---|---|
| Phase | Single Phase |
| Manufacturer | Mersen |
| Series | Surge-Trap® Pluggable STPT2 Series - 40kA |
| Model | STPT2-40K440V-2PM |
| Part Number | 83020127 |
| Product type | Type 2 Surge Protection Device |
| IEC Classification | Class II |
| Maximum discharge current (Imax) | 40 kA (8/20 μs) |
| Nominal discharge current (In) | 20 kA (8/20 μs) |
| Nominal operating voltage (Un) | 230 V IT / 400 V TNS |
| Maximum continuous operating voltage (Uc) | 440 V AC |
| Configuration | 2+0 IT / TNS |
| Number of poles | 2 |
| Modules | 2 |
| Mounting type | DIN rail |
| Format | Pluggable |
| Remote indication | Yes |
| Protection rating | IP20 |
| Short circuit withstand (ISCCR) | 25 kA |
| RoHS compliant | Yes |
| HS Code | 85363090 |
| Country of Manufacture | Spain |
It protects low-voltage electrical installations against transient overvoltages caused by lightning strikes and electrical switching events.
The STPT2-40K440V-2PM is a Type 2 / Class II surge protection device suitable for installation within low-voltage distribution systems.
Yes. The device incorporates a remote indication microswitch that allows the operational status of the SPD to be monitored remotely.
It is designed for 230 V IT and 400 V TNS electrical installations using a 2-pole 2+0 configuration.
The surge protection device mounts directly onto a standard DIN rail and features replaceable pluggable protection modules for simplified maintenance.
Mersen Surge-Trap® surge protection devices are trusted by electrical engineers, panel builders and maintenance professionals to provide dependable protection for industrial, commercial and critical infrastructure installations.
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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...