Mersen 83020146 STPT2-40K275V-4PG Type 2 surge protection device featuring 40 kA maximum discharge current, 230/400 V AC operation, DIN rail mounting and pluggable four-pole construction.
£138.41
The Mersen 83020146 STPT2-40K275V-4PG is a high-performance Type 2 surge protection device (SPD) designed to safeguard low-voltage electrical installations against transient overvoltages caused by switching events and indirect lightning strikes. As part of the trusted Mersen Surge-Trap® Pluggable STPT2 Series, it provides reliable protection for commercial, industrial and infrastructure applications.
Featuring a pluggable modular design, the device simplifies installation and maintenance while helping minimise downtime. It incorporates visual end-of-life indication and supports remote signalling, making it ideal for modern electrical distribution systems where dependable surge protection is essential.
Designed for 230/400 V AC three-phase TT systems, the 83020146 offers a maximum discharge current of 40 kA per phase. Its compact DIN rail mounting format makes it suitable for installation within electrical distribution boards and control panels.
Type 2 surge protection devices are installed within electrical distribution systems to limit transient overvoltages before they reach sensitive equipment. They help reduce the risk of damage to industrial automation equipment, switchgear, control panels, communication systems and electrical infrastructure.
The Mersen Surge-Trap® STPT2 range is engineered for long-term reliability and straightforward maintenance, making it suitable for demanding commercial and industrial environments where electrical continuity is critical.
| Voltage | 400 V |
|---|---|
| Phase | Three Phase |
| Manufacturer | Mersen |
| Series | Surge-Trap® Pluggable STPT2 Series |
| Model | STPT2-40K275V-4PG |
| Part number | 83020146 |
| Product type | Type 2 surge protection device |
| Maximum discharge current (Imax) | 40 kA |
| Nominal discharge current (In) | 20 kA |
| Nominal operating voltage | 230 / 400 V AC |
| Maximum continuous operating voltage (Uc) | 275 V AC |
| Configuration | 3+1 TT |
| Number of poles | 4 |
| Mounting type | DIN rail |
| Protection rating | IP20 |
| Operating temperature | -40°C to +85°C |
| Standards | IEC 61643-11, EN 61643-11, UL 1449 4th Edition |
| HS Code | 85363090 |
| Country of Manufacture | Spain |
It is a Type 2 surge protection device designed to protect low-voltage electrical systems from transient overvoltages caused by switching events and indirect lightning strikes.
The device is designed for 230/400 V AC three-phase TT systems using a 3+1 configuration.
The Mersen 83020146 provides a maximum discharge current of 40 kA per phase with a nominal discharge current of 20 kA.
The surge protection device mounts directly onto a standard DIN rail inside electrical distribution boards or control panels.
Yes. The pluggable design allows the protection modules to be replaced quickly without removing the complete base from the installation.
Mersen Surge-Trap® surge protection devices are trusted by electrical engineers, panel builders and industrial maintenance professionals to provide dependable protection for critical power distribution systems.
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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...