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Mersen Surge Protector Type 2 SPD 4 Pole 230/400 Volt 20KA IT
Mersen 83020156 STPT2-40K440V-4P Type 2 surge protection device with 40 kA maximum discharge current, 440 V AC Uc, 4+0 IT/TNS configuration and pluggable DIN rail construction.
This product has been discontinued
A direct replacement is available below.
Replacement product
K2-4P440 Mersen Surge Protector Type 2 SPD 4 Pole 230/400 Volt 20KA IT
SKU: 44020420
£109.85 ex VAT
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Why Choose the Mersen 83020156 Surge Protection Device?
The Mersen 83020156 STPT2-40K440V-4P is a robust Type 2 surge protection device (SPD) designed to protect low-voltage electrical installations from transient overvoltages caused by switching operations and indirect lightning strikes. As part of the Mersen Surge-Trap® Pluggable STPT2 Series, it delivers reliable protection for industrial, commercial and infrastructure power distribution systems.
Its pluggable modular design enables rapid cartridge replacement, reducing maintenance time while ensuring continued protection of critical electrical equipment. The compact DIN rail construction makes installation straightforward within electrical distribution boards and industrial control panels.
Designed for 230/400 V AC IT and 400/690 V AC TNS systems, the STPT2-40K440V-4P provides a 40 kA maximum discharge current with a 4+0 IT/TNS configuration, making it suitable for demanding industrial environments.
Key Advantages
- Reliable Type 2 surge protection device for low-voltage electrical systems.
- 40 kA maximum discharge current for effective transient overvoltage protection.
- Suitable for 230/400 V AC IT and 400/690 V AC TNS networks.
- 4+0 IT/TNS configuration for industrial installations.
- Pluggable cartridge design simplifies maintenance.
- Compact DIN rail mounting for distribution boards and control 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.
- 440 V AC Uc maximum continuous operating voltage.
- Supports 230/400 V AC IT and 400/690 V AC TNS systems.
- Four-pole pluggable construction.
- Visual end-of-life indication.
- DIN rail mounting.
- Mechanically coded cartridges to prevent incorrect replacement.
Reliable Surge Protection for Industrial Power Systems
Type 2 surge protection devices help limit transient overvoltages before they reach sensitive equipment. They reduce the risk of damage to automation systems, PLCs, variable speed drives, communications equipment and electrical distribution infrastructure.
The Mersen STPT2-40K440V-4P combines high surge handling capability with a durable pluggable design, making it suitable for demanding industrial and commercial installations requiring dependable electrical protection.
Typical Applications
- Industrial automation systems.
- Electrical distribution boards.
- Manufacturing facilities.
- Data centres and telecommunications infrastructure.
- Water treatment and utility installations.
- OEM machinery and industrial control panels.
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 | IT, TN-S | |
| Nominal Discharge Current (In) | 20 kA | |
| Remote Signal | No | |
| Manufacturer | Mersen | |
| Series | Surge-Trap® Pluggable STPT2 Series - 40kA | |
| Model | STPT2-40K440V-4P | |
| Part number | 83020156 | |
| EAN / UPC | 8435297851769 | |
| Product type | Type 2 surge protection device | |
| SPD Type | Type 2 / Class II | |
| Maximum discharge current (Imax) | 40 kA | |
| Maximum continuous operating voltage (Uc) | 440 V AC | |
| Supported systems | 230/400 V AC IT, 400/690 V AC TNS | |
| Configuration | TN-S (also suitable for 230/400 V IT) | |
| Number of poles | 4 | |
| Format | Pluggable | |
| Mounting type | DIN rail | |
| Protection rating | IP20 | |
| Response time | 25 ns | |
| Back-up fuse | 125 A gG | |
| Operating temperature | -40°C to +85°C | |
| Dimensions (H × W × D) | approx. 90 × 72 × 70 mm | |
| 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 83020156 used for?
It protects low-voltage electrical installations against transient overvoltages caused by switching operations and indirect lightning strikes.
Which electrical systems is this SPD designed for?
The device is suitable for 230/400 V AC IT and 400/690 V AC TNS electrical systems.
What is the maximum surge current rating?
The Mersen 83020156 provides a maximum discharge current of 40 kA 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 and industrial control panels.
Can the protection cartridges be replaced?
Yes. Its pluggable modular design allows fast replacement of protection cartridges during maintenance.
Trusted for Electrical Protection Worldwide
Mersen Surge-Trap® surge protection devices are trusted by electrical engineers, contractors and panel builders to provide dependable protection for critical power distribution systems.
