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Mersen Surge Protector Type 2 SPD 2 Pole 277 Volt 20KA TNS
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.
This product has been discontinued
A direct replacement is available below.
Replacement product
K2-2P320 Mersen Surge Protector Type 2 SPD 2 Pole 277 Volt 20KA TNS
SKU: 44020210
£56.09 ex VAT
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Why Choose the Mersen STPT2-40K320V-2P Surge Protection Device?
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.
Key Advantages
- High-performance Type 2 surge protection device.
- 40 kA maximum discharge current (Imax) for effective surge protection.
- Pluggable cartridge design simplifies maintenance.
- Visual end-of-life indication for easy inspection.
- Compact DIN rail mounting for electrical panels.
- Suitable for industrial, commercial and infrastructure applications.
Key Features
- Mersen Surge-Trap® STPT2 Series.
- Type 2 (Class II) surge protection device.
- 40 kA Imax (8/20 μs).
- 20 kA nominal discharge current (In).
- 277 V nominal operating voltage.
- 320 V UC maximum continuous operating voltage.
- 2 Pole (2+0 TNS) configuration.
- Pluggable modular construction.
- DIN rail mounting.
- Visual end-of-life indicator.
Reliable Protection Against Transient Overvoltages
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.
Typical Applications
- Industrial automation and manufacturing facilities.
- Commercial electrical distribution boards.
- Building management systems.
- Telecommunications and data centres.
- Water treatment plants.
- Outdoor LED lighting installations.
- Renewable energy systems.
- Smart grid and low-voltage metering installations.
Technical Specifications
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| Voltage | 277 V | |
|---|---|---|
| Phase | Single Phase | |
| Poles | 2-pole | |
| Device Type | Surge protection device | |
| SPD Type | Type 2 | |
| Earthing System | TN-S | |
| Nominal Discharge Current (In) | 20 kA | |
| Remote Signal | No | |
| 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 | TN-S | |
| Number of poles | 2 | |
| Mounting type | DIN rail | |
| Format | Pluggable | |
| RoHS compliant | Yes | |
| HS Code | 85363090 | |
| Country of Manufacture | Spain |
Frequently Asked Questions
What is the Mersen STPT2-40K320V-2P used for?
It protects low-voltage electrical installations and sensitive equipment against transient overvoltages caused by lightning strikes and switching events.
What type of surge protection device is this?
This model is a Type 2 (Class II) surge protection device designed for installation within electrical distribution systems.
What is the maximum surge current rating?
The device provides a maximum discharge current (Imax) of 40 kA with a nominal discharge current of 20 kA.
How is the device installed?
The STPT2-40K320V-2P is designed for DIN rail mounting and features a pluggable modular construction for easy maintenance.
Where is this surge protection device typically used?
It is widely used in industrial automation, commercial buildings, data centres, telecommunications, renewable energy systems and other critical electrical installations.
Trusted for Electrical Protection Worldwide
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.
