Mersen STPT2-40K440V-2P Type 2 surge protection device with 40 kA Imax, 440 V AC maximum continuous operating voltage, 2-pole pluggable DIN rail design for IT and TNS electrical systems.
£74.78
The Mersen STPT2-40K440V-2P (Part Number 83020126) is a high-performance Type 2 Surge Protection Device (SPD) engineered 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 STPT2 Series, it delivers dependable protection for industrial, commercial and infrastructure applications.
Featuring a 40 kA maximum discharge current (Imax), pluggable modular construction and DIN rail mounting, this surge protection device offers reliable protection while allowing quick replacement of protection modules during maintenance. Its compact format makes installation straightforward within distribution boards and control panels.
Designed for 230 V AC IT systems and 400 V AC TNS systems with a 2-pole configuration, the STPT2-40K440V-2P is ideal for protecting automation equipment, industrial machinery, commercial electrical installations and critical building services.
Type 2 surge protection devices are installed within low-voltage distribution systems to reduce the effects of transient overvoltages before they reach sensitive electrical equipment. This helps minimise equipment damage, reduce downtime and improve long-term system reliability.
The Mersen STPT2 Series combines high surge capacity with a modular pluggable design, enabling rapid cartridge replacement and reduced maintenance time without rewiring the complete surge protection assembly.
| Voltage | 400 V |
|---|---|
| Phase | Single Phase |
| Manufacturer | Mersen |
| Series | Surge-Trap® Pluggable STPT2 Series - 40kA |
| Model | STPT2-40K440V-2P |
| Part Number | 83020126 |
| 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 system voltage | 230 V AC (IT) / 400 V AC (TNS) |
| Maximum continuous operating voltage (Uc) | 440 V AC |
| Number of poles | 2 |
| Configuration | IT (1Ph+N) / TNS (1Ph+N) |
| Mounting type | DIN rail |
| Construction | Pluggable modular |
| Protection rating | IP20 |
| RoHS compliant | Yes |
| HS Code | 85363090 |
| Country of Manufacture | Spain |
It protects low-voltage electrical installations from transient overvoltages caused by lightning activity and electrical switching events.
This model is a Type 2 / Class II surge protection device for electrical distribution systems.
The STPT2-40K440V-2P provides a 40 kA maximum discharge current (Imax) and a nominal discharge current of 20 kA.
It is designed for 230 V AC IT systems and 400 V AC TNS systems using a 2-pole configuration.
The device mounts directly onto a standard DIN rail and features a pluggable modular design for simplified maintenance.
Mersen Surge-Trap® surge protection devices are trusted by electrical engineers, panel builders and maintenance professionals to provide dependable protection for critical low-voltage electrical 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...