Mersen STPT2-40K320V-2P Type 2 surge protection device featuring 40 kA maximum discharge current, 277 V operation, 2 pole configuration and pluggable DIN rail design for industrial and commercial electrical installations.
£74.78
The Mersen STPT2-40K320V-2P (Part Number 83020124) is a high-performance Type 2 Surge Protection Device (SPD) designed to protect low-voltage electrical installations against transient overvoltages caused by lightning strikes and switching events. As part of the trusted Mersen Surge-Trap® Pluggable STPT2 Series, it provides dependable protection for sensitive industrial, commercial and infrastructure equipment.
Featuring a 40 kA maximum discharge current (Imax), pluggable cartridge design and visual end-of-life indication, this surge protection device helps minimise downtime while simplifying maintenance. Its compact DIN rail mounting format makes installation straightforward within electrical distribution boards and control panels.
Designed for 277 V systems with a 2 Pole (2+0 TNS) configuration, the STPT2-40K320V-2P is suitable for protecting automation equipment, industrial machinery, telecommunications systems, data centres, building services and renewable energy installations.
Surge protection devices help safeguard electrical installations from transient voltage spikes caused by lightning activity and switching operations. Installing a quality SPD helps reduce equipment damage, minimise downtime and extend the service life of valuable electrical assets.
The Mersen STPT2 Series combines high surge handling capability with a modular pluggable design, allowing quick replacement of protection modules without disturbing system wiring, making maintenance faster and more cost-effective.
| Voltage | 277 V |
|---|---|
| Phase | Single Phase |
| Manufacturer | Mersen |
| Series | Surge-Trap® Pluggable STPT2 Series |
| Model | STPT2-40K320V-2P |
| Part Number | 83020124 |
| Product type | Type 2 Surge Protection Device (SPD) |
| 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) | 277 V AC |
| Maximum continuous operating voltage (UC) | 320 V AC |
| Configuration | 2+0 TNS |
| Number of poles | 2 |
| Mounting type | DIN rail |
| Format | Pluggable |
| RoHS compliant | Yes |
| HS Code | 85363090 |
| Country of Manufacture | Spain |
It protects low-voltage electrical installations and sensitive equipment against transient overvoltages caused by lightning strikes and switching events.
This model is a Type 2 (Class II) surge protection device designed for installation within electrical distribution systems.
The device provides a maximum discharge current (Imax) of 40 kA with a nominal discharge current of 20 kA.
The STPT2-40K320V-2P is designed for DIN rail mounting and features a pluggable modular construction for easy maintenance.
It is widely used in industrial automation, commercial buildings, data centres, telecommunications, renewable energy systems and other critical electrical installations.
Mersen Surge-Trap® surge protection devices are trusted by electrical engineers, panel builders and industrial maintenance professionals to provide reliable protection against damaging transient overvoltages in demanding applications.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
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...