Mersen 83020156 STPT2-40K440V-4P Type 2 surge protection device with 40 kA maximum discharge current, 440 V AC Uc, 4+0 IT/TNS configuration and pluggable DIN rail construction.
£146.46
The Mersen 83020156 STPT2-40K440V-4P is a robust Type 2 surge protection device (SPD) designed to protect low-voltage electrical installations from transient overvoltages caused by switching operations and indirect lightning strikes. As part of the Mersen Surge-Trap® Pluggable STPT2 Series, it delivers reliable protection for industrial, commercial and infrastructure power distribution systems.
Its pluggable modular design enables rapid cartridge replacement, reducing maintenance time while ensuring continued protection of critical electrical equipment. The compact DIN rail construction makes installation straightforward within electrical distribution boards and industrial control panels.
Designed for 230/400 V AC IT and 400/690 V AC TNS systems, the STPT2-40K440V-4P provides a 40 kA maximum discharge current with a 4+0 IT/TNS configuration, making it suitable for demanding industrial environments.
Type 2 surge protection devices help limit transient overvoltages before they reach sensitive equipment. They reduce the risk of damage to automation systems, PLCs, variable speed drives, communications equipment and electrical distribution infrastructure.
The Mersen STPT2-40K440V-4P combines high surge handling capability with a durable pluggable design, making it suitable for demanding industrial and commercial installations requiring dependable electrical protection.
| Voltage | 400 V |
|---|---|
| Phase | Three Phase |
| Manufacturer | Mersen |
| Series | Surge-Trap® Pluggable STPT2 Series - 40kA |
| Model | STPT2-40K440V-4P |
| Part number | 83020156 |
| EAN / UPC | 8435297851769 |
| Product type | Type 2 surge protection device |
| SPD type | Type 2 / Class II |
| Maximum discharge current (Imax) | 40 kA |
| Nominal discharge current (In) | 20 kA |
| Maximum continuous operating voltage (Uc) | 440 V AC |
| Supported systems | 230/400 V AC IT, 400/690 V AC TNS |
| Configuration | 4+0 IT / TNS |
| Number of poles | 4 |
| Format | Pluggable |
| Mounting type | DIN rail |
| Protection rating | IP20 |
| Response time | 25 ns |
| Back-up fuse | 125 A gG |
| Operating temperature | -40°C to +85°C |
| Dimensions (H × W × D) | approx. 90 × 72 × 70 mm |
| Standards | IEC 61643-11, EN 61643-11, UL 1449 4th Edition |
| HS Code | 85363090 |
| Country of Manufacture | Spain |
It protects low-voltage electrical installations against transient overvoltages caused by switching operations and indirect lightning strikes.
The device is suitable for 230/400 V AC IT and 400/690 V AC TNS electrical systems.
The Mersen 83020156 provides a maximum discharge current of 40 kA with a nominal discharge current of 20 kA.
The surge protection device mounts directly onto a standard DIN rail inside electrical distribution boards and industrial control panels.
Yes. Its pluggable modular design allows fast replacement of protection cartridges during maintenance.
Mersen Surge-Trap® surge protection devices are trusted by electrical engineers, contractors and panel builders to provide dependable protection for critical power distribution systems.
● Service Agreements
Credit Accounts
Our service agreements are built to support long term procurement relationships. By working closely with engineering teams and procurement departments, we help streamline purchasing processes while ensuring consistent access to critical components and sourcing support when it matters most.
● frequently asked questions
At Led Controls Ltd we help engineers source the right automation and control gear with confidence. below are quick answers to what we are asked most often.
We supply all leading manfacturers in our industry. we offer next day delivery on most poplour products.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
● latest blog
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...