DEHN DSH ZP B2 TNS 255 Combined Lightning Current and Surge Arrester Type 1+2 DEHNshield ZP 909330 (909340)

The DEHN DSH ZP B2 TNS 255 combines Type 1 and Type 2 surge protection in a single compact unit for TN-S systems. This 4-pole arrester handles lightning impulse currents up to 12.5 kA per pole and total 50 kA, with a voltage protection level of ≤ 1.5 kV. Its follow current extinguishing capability of 50 kA rms and short-circuit withstand of 50 kA rms ensure reliable operation. Designed for 35 mm DIN rail mounting, it operates from -40 °C to +80 °C and is housed in red thermoplastic, width 4 modules (72 mm).

Highlights

• Combined Type 1 + Type 2 protection
• For TN-S network systems
• Lightning impulse current: 12.5 kA per pole, 50 kA total
• Voltage protection level ≤ 1.5 kV
• Follow current extinguishing capability 50 kA rms
• Short-circuit withstand 50 kA rms
• 4-pole (3P+N), 4 modules wide
• Mounts on 35 mm DIN rail
• Operating temperature -40 °C to +80 °C
• Housing: red thermoplastic

In daily use

Install the DEHNshield ZP in the main distribution board to protect electrical installations from direct lightning strikes and surges. Its compact 4-module width saves space, and the DIN rail mount simplifies installation. The unit operates silently and requires no maintenance under normal conditions.

Full specifications

• Product type: Combined Lightning Current and Surge Arrester
• SPD type: Type 1 + Type 2
• Network system: TN-S
• Nominal voltage (Un): 230 / 400 V AC
• Max. continuous operating voltage (Uc): 255 V AC
• Lightning impulse current (Iimp): 12.5 kA (10/350 µs) per pole, 50 kA total
• Nominal discharge current (In): 20 kA (8/20 µs)
• Max. discharge current (Imax): 50 kA (8/20 µs)
• Voltage protection level (Up): ≤ 1.5 kV
• Follow current extinguishing capability (Ifi): 50 kA rms
• Short-circuit withstand capability (Isccr): 50 kA rms
• Number of poles: 4-pole (3P+N)
• Mounting type: 35 mm DIN rail
• Operating temperature range: -40 °C to +80 °C
• Degree of protection: IP20
• Standards compliance: IEC 61643-11, EN 61643-11
• Remote signaling contact: No
• Housing material: Thermoplastic, red
• Module width: 4 modules (72 mm)

Final note

The DEHN DSH ZP B2 TNS 255 offers robust surge protection for TN-S systems, combining high discharge capacity with a compact design.