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Mersen Surge Protector Type 2 SPD 4 Pole 277/480 Volt 20KA TT
Mersen 83020148 STPT2-40K320V-4PG Type 2 surge protection device with 40 kA maximum discharge current, 20 kA nominal discharge current, 320 V AC Uc, 277/480 V AC operation, 3+1 TT configuration and four-pole pluggable DIN rail construction.
This product has been discontinued
A direct replacement is available below.
Replacement product
K2-4PG320 Mersen Surge Protector Type 2 SPD 4 Pole 277/480 Volt 20KA TT
SKU: 44020408
£112.89 ex VAT
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Why Choose the Mersen 83020148 Surge Protection Device?
The Mersen 83020148 STPT2-40K320V-4PG is a reliable Type 2 surge protection device (SPD) designed to protect low-voltage electrical installations from transient overvoltages caused by switching operations and indirect lightning activity. As part of the Mersen Surge-Trap® Pluggable STPT2 Series, it provides dependable surge protection for commercial, industrial and infrastructure power distribution systems.
This pluggable SPD is engineered for straightforward installation, quick cartridge replacement and long-term protection of critical electrical equipment. Its modular construction helps minimise downtime during maintenance, while its visual indication system makes it easy to identify when replacement is required.
With a 40 kA maximum discharge current, 320 V AC maximum continuous operating voltage and 3+1 TT configuration, the Mersen 83020148 is suitable for three-phase plus neutral 277/480 V AC electrical systems. Its four-pole DIN rail format makes it ideal for installation inside distribution boards and control panels.
Key Advantages
- Reliable Type 2 surge protection device for low-voltage power systems.
- 40 kA maximum discharge current for effective transient overvoltage protection.
- Designed for three-phase plus neutral 277/480 V AC systems.
- 3+1 TT configuration suitable for TT earthing arrangements.
- Pluggable design allows fast replacement of protection cartridges.
- DIN rail mounting for easy installation in distribution boards and panels.
Key Features
- Mersen Surge-Trap® Pluggable STPT2 Series.
- Type 2 / Class II surge protection.
- 40 kA Imax (8/20 μs) maximum discharge current.
- 20 kA In (8/20 μs) nominal discharge current.
- 277/480 V AC nominal operating voltage.
- 320 V AC Uc maximum continuous operating voltage.
- 3Ph+N electrical system configuration.
- 3+1 TT protection arrangement.
- Four-pole, four-module pluggable construction.
- Visual indication for protection status monitoring.
Reliable Surge Protection for Electrical Distribution
Type 2 surge protection devices are installed in distribution boards and electrical panels to limit transient overvoltages before they reach sensitive equipment. They help protect industrial automation systems, control circuits, power supplies, drives, monitoring devices and connected electrical loads from damaging voltage spikes.
The Mersen STPT2-40K320V-4PG combines strong surge handling capability with a practical pluggable construction, making it a dependable choice for contractors, panel builders and maintenance engineers working on commercial and industrial power distribution systems.
Typical Applications
- Three-phase electrical distribution boards.
- Commercial building power systems.
- Industrial control panels.
- Manufacturing and automation equipment.
- Utility and infrastructure installations.
- Panel building and electrical protection upgrades.
Technical Specifications
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| Voltage | 480 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 - 40kA | |
| Model | STPT2-40K320V-4PG | |
| Part number | 83020148 | |
| 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 | |
| Waveform | 8/20 μs | |
| Nominal operating voltage | 277 / 480 V AC | |
| Maximum continuous operating voltage (Uc) | 320 V AC | |
| Electrical system | 3-phase + neutral | |
| Configuration | TN-S, TT | |
| Number of poles | 4 | |
| Module width | 4 modules | |
| Format | Pluggable | |
| Mounting type | DIN rail | |
| Indication system | Visual status indication | |
| Protection rating | IP20 | |
| Product dimensions (H × W × D) | approx. 90 × 72 × 70 mm | |
| Product weight | approx. 0.386 kg | |
| Standards | IEC 61643-11, EN 61643-11, UL 1449 | |
| HS Code | 85363090 | |
| Country of Manufacture | Spain |
Frequently Asked Questions
What is the Mersen 83020148 used for?
The Mersen 83020148 is used to protect low-voltage electrical installations from transient overvoltages caused by switching events and indirect lightning activity.
What type of surge protection device is it?
It is a Type 2 / Class II surge protection device designed for installation in distribution boards and electrical control panels.
What is the maximum discharge current?
The device has a maximum discharge current of 40 kA with an 8/20 μs surge waveform.
What electrical system is this SPD suitable for?
The Mersen 83020148 is suitable for 277/480 V AC three-phase plus neutral systems using a 3+1 TT configuration.
Is the Mersen 83020148 pluggable?
Yes. The STPT2-40K320V-4PG has a pluggable four-module design, allowing protection cartridges to be replaced quickly during maintenance.
Trusted for Electrical Protection Worldwide
Mersen Surge-Trap® surge protection devices are trusted by electrical contractors, panel builders and industrial engineers to help protect critical power distribution systems against damaging transient overvoltages.
