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Mersen Surge Protector Type 2 SPD 2 Pole 48 Volt 20KA TNS

Mersen Surge Protector Type 2 SPD 2 Pole 48 Volt 20KA TNS

Mersen STPT2-40K60V-2P Type 2 surge protection device with 40 kA Imax, 48 V AC nominal operating voltage, 60 V AC Uc, 2+0 TNS configuration and pluggable DIN rail design.

SKU: 83020128Alt SKU: STPT2-40K60V-2PMPN: 83020128
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Why Choose the Mersen STPT2-40K60V-2P Surge Protection Device?

The Mersen STPT2-40K60V-2P 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 electrical switching events. As part of the Mersen Surge-Trap® Pluggable STPT2 Series, it provides reliable surge protection for industrial, commercial and infrastructure electrical systems.

This surge protection device features a 40 kA maximum discharge current (Imax), 60 V AC maximum continuous operating voltage and a compact pluggable design for straightforward installation and maintenance. Its modular construction supports quick replacement of protection cartridges without disturbing the complete installation.

Designed for 48 V AC nominal systems with a 2+0 TNS configuration, the STPT2-40K60V-2P is suitable for protecting control circuits, signalling equipment, automation panels, telecommunications systems and low-voltage electrical infrastructure.

Key Advantages

  • Reliable Type 2 surge protection device for low-voltage systems.
  • 40 kA maximum discharge current for strong transient overvoltage protection.
  • 60 V AC maximum continuous operating voltage.
  • Pluggable design enables fast module replacement.
  • Compact 2-pole DIN rail mounting format for control panels.
  • Suitable for industrial, commercial and infrastructure 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.
  • 48 V AC nominal operating voltage.
  • 60 V AC Uc maximum continuous operating voltage.
  • 2+0 TNS system configuration.
  • 2-pole, 2-module pluggable construction.
  • Visual indication system for device status.
  • DIN rail mounting for electrical distribution panels.

Reliable Surge Protection for Low-Voltage Installations

Type 2 surge protection devices are used within electrical distribution systems to reduce transient overvoltages before they reach sensitive connected equipment. This helps minimise electrical damage, improve system reliability and reduce unplanned downtime.

The Mersen STPT2 pluggable range is designed for practical panel installation, combining high surge discharge capability with replaceable modules and clear device status indication for simpler preventative maintenance.

Typical Applications

  • Industrial control panels.
  • Low-voltage distribution boards.
  • Automation and signalling circuits.
  • Telecommunications equipment.
  • Building services and facilities systems.
  • Instrumentation and process control panels.
  • Electrical installations requiring 48 V AC surge protection.

Technical Specifications

Phase Single Phase
Manufacturer Mersen
Series Surge-Trap® Pluggable STPT2 Series - 40kA
Model STPT2-40K60V-2P
Item number 83020128
Product type Surge protection device
SPD Type Type 2 / Class II
Maximum discharge current 40 kA Imax (8/20 μs)
Nominal operating voltage 48 V AC
Maximum continuous operating voltage 60 V AC
System configuration TN-S
Protection mode L-PE
Number of poles 2 poles
Module width 2 modules
Format Pluggable
Mounting type DIN rail
Short circuit withstand 25 kA
Maximum back-up fuse 125 A gG
RoHS compliant Yes
EAN / UPC 8435297851097
HS Code 85363090
Country of Manufacture Spain
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

Frequently Asked Questions

What is the Mersen STPT2-40K60V-2P used for?

It is used to protect low-voltage electrical installations and connected equipment against transient overvoltages caused by lightning activity and switching events.

What type of surge protection device is this?

The STPT2-40K60V-2P is a Type 2 / Class II surge protection device for electrical distribution and control 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.

What voltage is this model designed for?

It is designed for 48 V AC nominal systems with a 60 V AC maximum continuous operating voltage.

How is this surge protection device installed?

The device is designed for DIN rail mounting and uses a pluggable modular format for straightforward installation and maintenance.

Trusted by Electrical Engineers Worldwide

Mersen Surge-Trap® surge protection devices are trusted by panel builders, electrical contractors and maintenance engineers to protect critical low-voltage installations from damaging transient overvoltages.

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