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Mersen Surge Protector Type 2 SPD 4 Pole 230/400 Volt 20KA TT
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.
This product has been discontinued
A direct replacement is available below.
Replacement product
K2-4PG275 Mersen Surge Protector Type 2 SPD 4 Pole 230/400 Volt 20KA TT
SKU: 44020400
£106.92 ex VAT
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Why Choose the Mersen 83020146 Surge Protection Device?
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.
Key Advantages
- High-performance Type 2 surge protection device for low-voltage installations.
- 40 kA maximum discharge current per phase.
- Suitable for 3-phase + neutral TT electrical systems.
- Pluggable cartridges allow fast replacement during maintenance.
- Visual status indication with remote signalling capability.
- DIN rail mounting for straightforward installation.
Key Features
- Mersen Surge-Trap® Pluggable STPT2 Series.
- Type 2 / Class II SPD.
- 40 kA Imax (8/20 μs) maximum discharge current.
- 20 kA In (8/20 μs) nominal discharge current.
- 230/400 V AC nominal operating voltage.
- 3+1 TT configuration with four poles.
- Pluggable four-module construction.
- Visual end-of-life indication and remote monitoring support.
Reliable Protection Against Electrical Surges
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.
Typical Applications
- Industrial automation systems.
- Electrical distribution boards.
- Commercial buildings.
- Manufacturing facilities.
- Data centres and telecommunications equipment.
- Water treatment plants and utility infrastructure.
Technical Specifications
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| Voltage | 400 V | |
|---|---|---|
| Phase | Three Phase | |
| Poles | 4-pole | |
| Device Type | Surge protection device | |
| SPD Type | Type 2 | |
| Earthing System | TN-S, TT | |
| Nominal Discharge Current (In) | 20 kA | |
| Remote Signal | No | |
| 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 | TN-S, 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 |
Frequently Asked Questions
What is the Mersen 83020146 used for?
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.
What electrical system is this SPD designed for?
The device is designed for 230/400 V AC three-phase TT systems using a 3+1 configuration.
What is the maximum surge current rating?
The Mersen 83020146 provides a maximum discharge current of 40 kA per phase with a nominal discharge current of 20 kA.
How is the device installed?
The surge protection device mounts directly onto a standard DIN rail inside electrical distribution boards or control panels.
Can the protection cartridges be replaced?
Yes. The pluggable design allows the protection modules to be replaced quickly without removing the complete base from the installation.
Trusted for Electrical Protection Worldwide
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.
