3 Pole Type 2 Surge Protection Device (WSPD340)

The WSPD340 is a 3 Pole Type 2 Surge Protection Device designed for three-phase electrical systems requiring protection against transient overvoltages caused by switching events and lightning-related surge activity. With a 20kA nominal discharge current and 40kA maximum discharge rating, it provides practical board-level surge protection for commercial and industrial applications.

This 3 phase SPD is suited to three-phase distribution systems, plant equipment, commercial boards and specialist electrical installations where surge protection is required across L1, L2 and L3. Its compact DIN rail format allows straightforward installation inside compatible boards and enclosures.

• 3 Pole Type 2 SPD – designed for three-phase surge protection systems
• 20kA nominal / 40kA maximum discharge rating – protection against transient overvoltages
• Protection across L1, L2 and L3 – suitable for three-phase applications
• DIN rail mounted – compact format for board integration
• Mechanical status indication – visual inspection of SPD condition
• 54mm wide body – compact 3-pole enclosure format
• IEC 61643-11 compliant – recognised SPD standard

WSPD Type 2 Surge Protection Device Range

3 Phase Surge Protection for Distribution Systems

A dedicated 3 phase surge protection device helps reduce the risk of transient overvoltages damaging connected electrical and electronic equipment within commercial and industrial systems.

The WSPD340 is commonly used inside three-phase boards, distribution equipment and plant systems where surge protection is required across the three live conductors without a dedicated neutral protection module.

Its compact DIN rail format makes it suitable for integration into compatible distribution boards, switchgear and enclosure assemblies where board-level surge protection is specified.

• Model: WSPD340
• Product Type: Type 2 Surge Protection Device (SPD)
• Configuration: 3 Pole
• System Type: Three-phase
• Nominal Discharge Current (In): 20kA
• Maximum Discharge Current (Imax): 40kA
• Maximum AC Operating Voltage (Uc): 275V
• Protection Level (Up): 1.5kV
• Dimensions (W × H × D): 54 × 90 × 65mm
• Connection Capacity: 2.5–25mm²
• Mounting: 35mm DIN rail
• Operating Temperature: -40°C to +85°C
• Protection Rating: IP20
• Back-Up Fuse: 125A max. gL / gG
• Status Indicator: Mechanical red / green indicator
• Standards: IEC 61643-11 / EN 61643-11

The WSPD340 3 phase SPD should be installed by a qualified electrician as part of a coordinated surge protection arrangement for suitable three-phase electrical systems.

• Install inside a suitable enclosure or distribution board
• Connect L1, L2 and L3 using correctly sized conductors
• Keep connecting and earth conductors as short as practical
• Coordinate with upstream or downstream surge protection where required
• Check the mechanical status indicators during commissioning and inspection
• Mount onto a standard 35mm DIN rail

What is the WSPD340 used for?

The WSPD340 is a 3 pole Type 2 surge protection device used to help protect three-phase electrical systems from transient overvoltages caused by switching events and surge activity.

Is the WSPD340 suitable for three-phase boards?

Yes. The WSPD340 is designed for three-phase applications and provides surge protection across L1, L2 and L3.

What is the difference between the WSPD340 and WSPD440?

The WSPD340 is a 3-pole SPD, while the WSPD440 is a 3P+N surge protection device designed for three-phase and neutral arrangements.

What surge rating does the WSPD340 have?

The WSPD340 has a 20kA nominal discharge current and 40kA maximum discharge rating.

How is the WSPD340 installed?

The unit is designed for mounting onto a standard 35mm DIN rail inside a suitable enclosure or distribution board.

Can this SPD be used in commercial installations?

Yes. The WSPD340 is suited to commercial and industrial three-phase distribution systems where board-level surge protection is required.