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Mersen Surge Protector Type 2 SPD 2 Pole 230/400 Volt 20KA IT Remote Indication
Mersen STPT2-40K440V-2PM Type 2 surge protection device featuring 40 kA maximum discharge current, 440 V AC maximum continuous operating voltage, pluggable DIN rail construction and remote indication for industrial electrical installations.
This product has been discontinued
A direct replacement is available below.
Replacement product
K2-2P440-M Mersen Surge Protector Type 2 SPD 2 Pole 230/400 Volt 20KA IT Remote Indication
SKU: 44020219
£65.06 ex VAT
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Why Choose the Mersen STPT2-40K440V-2PM Surge Protection Device?
The Mersen STPT2-40K440V-2PM (Part Number 83020127) is a high-performance Type 2 surge protection device (SPD) engineered to protect low-voltage electrical installations from transient overvoltages caused by lightning activity and electrical switching events. As part of the Mersen Surge-Trap® Pluggable STPT2 Series, it provides dependable protection for industrial, commercial and infrastructure electrical systems.
Designed with a 40 kA maximum discharge current (Imax), pluggable modular construction and an integrated remote indication contact, this SPD allows rapid maintenance while enabling continuous monitoring of device status through external control or building management systems.
Suitable for 230 V IT and 400 V TNS electrical systems, the STPT2-40K440V-2PM features a compact 2-pole DIN rail mounted design, making it ideal for protecting control panels, distribution boards, automation equipment and critical electrical infrastructure.
Key Advantages
- Reliable Type 2 surge protection for low-voltage installations.
- 40 kA maximum discharge current provides excellent surge protection.
- Integrated remote indication contact for external monitoring.
- Pluggable module design enables quick replacement during servicing.
- Compact DIN rail mounting for electrical panels.
- Suitable for IT and TNS network configurations.
Key Features
- Mersen Surge-Trap® Pluggable STPT2 Series.
- Type 2 / Class II surge protection device.
- 40 kA Imax maximum discharge current.
- 20 kA nominal discharge current (In).
- 440 V AC maximum continuous operating voltage (Uc).
- 230 V IT / 400 V TNS network compatibility.
- 2-pole, 2-module pluggable construction.
- Remote indication microswitch.
- Visual end-of-life status indication.
- DIN rail mounting.
Reliable Protection Against Electrical Surges
Type 2 surge protection devices help prevent damage to electrical equipment by safely diverting transient overvoltages generated by lightning activity and electrical switching events. This reduces downtime, extends equipment life and improves the reliability of critical electrical systems.
The Mersen Surge-Trap® STPT2 Series combines high surge capacity with pluggable cartridges and integrated remote monitoring, making it ideal for installations where preventative maintenance and system availability are essential.
Typical Applications
- Industrial automation systems.
- Electrical distribution boards.
- Commercial buildings.
- Machine control panels.
- Building management systems.
- Telecommunications infrastructure.
- Data centres.
- Renewable energy installations.
- Water treatment facilities.
Technical Specifications
Tick the specs you need, then view products that match.
| Voltage | 400 V | |
|---|---|---|
| Phase | Single Phase | |
| Poles | 2-pole | |
| Device Type | Surge protection device | |
| SPD Type | Type 2 | |
| Earthing System | IT, TN-S | |
| Nominal Discharge Current (In) | 20 kA | |
| Remote Signal | Yes | |
| Manufacturer | Mersen | |
| Series | Surge-Trap® Pluggable STPT2 Series - 40kA | |
| Model | STPT2-40K440V-2PM | |
| Part Number | 83020127 | |
| Product type | Type 2 Surge Protection Device | |
| IEC Classification | Class II | |
| Maximum discharge current (Imax) | 40 kA (8/20 μs) | |
| Nominal operating voltage (Un) | 230 V IT / 400 V TNS | |
| Maximum continuous operating voltage (Uc) | 440 V AC | |
| Configuration | TN-S (also suitable for 230 V IT) | |
| Number of poles | 2 | |
| Modules | 2 | |
| Mounting type | DIN rail | |
| Format | Pluggable | |
| Remote indication | Yes | |
| Protection rating | IP20 | |
| Short circuit withstand (ISCCR) | 25 kA | |
| RoHS compliant | Yes | |
| HS Code | 85363090 | |
| Country of Manufacture | Spain |
Frequently Asked Questions
What is the Mersen STPT2-40K440V-2PM used for?
It protects low-voltage electrical installations against transient overvoltages caused by lightning strikes and electrical switching events.
What type of surge protection device is this?
The STPT2-40K440V-2PM is a Type 2 / Class II surge protection device suitable for installation within low-voltage distribution systems.
Does this model provide remote monitoring?
Yes. The device incorporates a remote indication microswitch that allows the operational status of the SPD to be monitored remotely.
Which electrical systems is this SPD suitable for?
It is designed for 230 V IT and 400 V TNS electrical installations using a 2-pole 2+0 configuration.
How is the device installed?
The surge protection device mounts directly onto a standard DIN rail and features replaceable pluggable protection modules for simplified maintenance.
Trusted by Electrical Professionals Worldwide
Mersen Surge-Trap® surge protection devices are trusted by electrical engineers, panel builders and maintenance professionals to provide dependable protection for industrial, commercial and critical infrastructure installations.
