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Mersen Surge Protector Type 2 SPD 2 Pole 277 Volt 20KA TNS Remote Indication
Mersen STPT2-40K320V-2PM Type 2 surge protection device with 40 kA Imax, 320 V AC Uc, 1Ph+N 2+0 TNS configuration, 2-pole pluggable DIN rail design and remote indication.
This product has been discontinued
A direct replacement is available below.
Replacement product
K2-2P320-M Mersen Surge Protector Type 2 SPD 2 Pole 277 Volt 20KA TNS Remote Indication
SKU: 44020211
£65.06 ex VAT
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Why Choose the Mersen STPT2-40K320V-2PM Surge Protection Device?
The Mersen STPT2-40K320V-2PM is a high-performance Type 2 surge protection device (SPD) designed to protect low-voltage electrical installations against transient overvoltages caused by lightning activity and switching operations. As part of the Mersen Surge-Trap® Pluggable STPT2 Series, it provides reliable surge protection for industrial, commercial and infrastructure electrical systems.
This device features a 40 kA maximum discharge current, 320 V AC maximum continuous operating voltage and a compact pluggable modular design for fast installation and maintenance. The integrated remote indication contact enables condition monitoring from control panels, BMS systems or external signalling circuits.
With a 1Ph+N configuration, 2+0 TNS network arrangement and 2-pole DIN rail format, the STPT2-40K320V-2PM is well suited to distribution boards, control panels, automation systems and electrical installations requiring dependable Type 2 surge protection.
Key Advantages
- Reliable Type 2 surge protection device for low-voltage installations.
- 40 kA maximum discharge current for strong transient overvoltage protection.
- Remote indication contact for external device status monitoring.
- Pluggable module design enables quick replacement and maintenance.
- Compact 2-pole DIN rail mounting format for panel installation.
- Suitable for industrial, commercial and building service applications.
Key Features
- Mersen Surge-Trap® Pluggable STPT2 Series.
- Type 2 / Class II surge protection device.
- 40 kA Imax discharge capacity using 8/20 μs waveform.
- 320 V AC Uc maximum continuous operating voltage.
- 277 V AC nominal operating voltage.
- 1Ph+N, 2+0 TNS configuration.
- 2-pole, 2-module pluggable construction.
- Remote indication for monitoring SPD condition.
- DIN rail mounting for electrical distribution panels.
Reliable Surge Protection for Electrical Installations
Type 2 surge protection devices help reduce the risk of equipment damage by limiting transient overvoltages within electrical distribution systems. They are commonly used downstream of Type 1 protection, or as primary protection in installations not exposed to direct lightning strikes.
The Mersen STPT2 pluggable range is designed for practical panel installation, with replaceable protection modules and clear monitoring options that support preventative maintenance and reduce system downtime.
Typical Applications
- Commercial distribution boards.
- Industrial control panels.
- Building services and facilities management systems.
- Automation and process control equipment.
- Telecommunications and data infrastructure.
- Lighting control panels and low-voltage systems.
- Electrical installations requiring remote SPD status monitoring.
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 | Yes | |
| Manufacturer | Mersen | |
| Series | Surge-Trap® Pluggable STPT2 Series - 40kA | |
| Model | STPT2-40K320V-2PM | |
| Item number | 83020125 | |
| Product type | Surge protection device | |
| SPD Type | Type 2 / Class II | |
| Maximum discharge current | 40 kA Imax (8/20 μs) | |
| Nominal operating voltage | 277 V AC | |
| Maximum continuous operating voltage | 320 V AC | |
| Network configuration | TN-S | |
| Number of poles | 2 poles | |
| Module width | 2 modules | |
| Format | Pluggable | |
| Remote indication | Yes | |
| Mounting type | DIN rail | |
| RoHS compliant | Yes | |
| EAN / UPC | 8435297851080 | |
| HS Code | 85363090 | |
| Country of Manufacture | Spain |
Frequently Asked Questions
What is the Mersen STPT2-40K320V-2PM used for?
It is used to protect low-voltage electrical installations and connected equipment from transient overvoltages caused by lightning activity and switching events.
What type of surge protection device is this?
The STPT2-40K320V-2PM is a Type 2 / Class II surge protection device for electrical distribution systems.
What is the maximum discharge current rating?
This SPD has a 40 kA Imax maximum discharge current rating using an 8/20 μs waveform.
Does this model include remote indication?
Yes. The STPT2-40K320V-2PM includes remote indication, allowing the SPD status to be monitored through external signalling or control systems.
Where is this surge protection device typically installed?
It is typically installed on a DIN rail inside electrical distribution boards, control panels and low-voltage switchgear assemblies.
Trusted by Electrical Engineers Worldwide
Mersen Surge-Trap® surge protection devices are widely used by panel builders, electrical contractors and maintenance engineers to protect critical low-voltage installations against damaging transient overvoltages.
