DEHN DEHNcord L3P 275SO IP Type 2 Surge Protective Device (900447)

In industrial and commercial electrical installations, the DEHNcord L3P 275SO IP Type 2 surge protective device safeguards three-phase power systems with neutral from transient overvoltages. Installed on a 35 mm DIN rail in distribution boards, it protects downstream equipment from surge damage caused by indirect lightning strikes or switching operations.

Key specifications

• Type 2 surge protective device according to EN 61643-11 / IEC 61643-11
• Nominal voltage: 230 / 400 V AC
• Max. continuous operating voltage: 275 V AC
• Nominal discharge current (8/20 µs): 20 kA
• Max. discharge current (8/20 µs): 40 kA
• Voltage protection level at In: ≤ 1.3 kV
• Voltage protection level at 5 kA: ≤ 1.1 kV
• 3-pole + N configuration with protection paths L1-N, L2-N, L3-N, N-PE
• Visual status indication: green = OK, red = fault
• Connection: screw terminals for 1.5 - 35 mm² solid or 1.5 - 25 mm² stranded conductors
• Max. backup fuse: 125 A gG
• Short-circuit withstand capability: 50 kA_rms
• Operating temperature range: -40 °C to +80 °C
• Degree of protection: IP20

Why choose it

The DEHNcord L3P 275SO IP provides reliable protection for three-phase power supplies with a high discharge capacity and low voltage protection level. Its compact DIN rail mountable design simplifies installation in distribution panels, and the clear visual status indicator allows quick maintenance checks.

Ideal use cases

• Protection of industrial control systems and machinery
• Surge protection for commercial building power distribution
• Installation in sub-distribution boards to protect downstream equipment

Good to know

The device is designed for use in TN-S and TT power systems. It features a 3-pole + N configuration, ensuring protection for all live conductors and the neutral. The screw terminals accommodate a wide range of conductor sizes, and the device can be backed up by a fuse up to 125 A gG.