DEHN Surge Arrester Type 2 guard DG MD TNS 275 (943400)

The DEHN guard DG MD TNS 275 stands out as a modular Type 2 surge arrester engineered specifically for TN-S earthing systems, delivering robust protection for low-voltage installations. Its 4-pole configuration with 4 TE width ensures comprehensive safeguarding of all live conductors and neutral, while the high discharge capacity handles demanding surge events.

Highlights

• Type 2 surge protection for TN-S systems
• 4-pole design (3P+N) with protection paths L-N and N-PE
• Nominal discharge current 20 kA per pole, max 40 kA
• Voltage protection level ≤ 1.5 kV
• Thermal disconnector for safe operation
• Compact 4-module DIN rail mounting

In daily use

Installed on a 35 mm DIN rail, the guard DG MD TNS 275 provides reliable protection against transient overvoltages. Its fast response time of less than 25 ns ensures sensitive equipment is shielded from surge damage. The thermoplastic housing offers durability across a wide temperature range from -40 °C to +80 °C, making it suitable for various environments.

Full specifications

• Maximum continuous operating voltage (Uc): 275 V AC
• Nominal discharge current (In): 20 kA (8/20 µs) per pole
• Maximum discharge current (Imax): 40 kA (8/20 µs) per pole
• Voltage protection level (Up): ≤ 1.5 kV at In
• Follow current extinguishing capability: 100 A rms
• Response time: < 25 ns
• Short-circuit withstand capability: 50 kA rms with max backup fuse
• Degree of protection: IP20
• Operating temperature range: -40 °C to +80 °C
• Housing material: Thermoplastic
• Mounting: 35 mm DIN rail
• Remote signalling contact: No

Final note

A dependable choice for protecting electrical installations against surge damage, combining high discharge capacity with a compact modular design.