DEHN 951400 Modular Combined Arrester for TN-S Systems IP20

With a total lightning impulse current of 50 kA (10/350 µs), the DEHN 951400 is a powerful combined arrester for TN-S systems, offering Type 1 and Type 2 protection in a single modular unit. Its RADAX-Flow spark gap technology ensures reliable follow current extinguishing up to 50 kA rms.

Overview

The DEHN 951400 is a 3+1 pole surge protective device designed for 230/400 V AC TN-S power supply systems. It provides a nominal discharge current of 20 kA (8/20 µs) and a maximum discharge current of 50 kA, with a voltage protection level of ≤ 1.5 kV. The device is mounted on a 35 mm DIN rail and occupies 4 modules (TE).

What stands out

• Combined Type 1 + Type 2 protection for TN-S systems
• High total lightning impulse current: 50 kA (10/350 µs)
• RADAX-Flow spark gap technology for reliable performance
• Integrated thermal disconnector for safe operation
• Compact 4-module design for space-saving installation

Technical details

• System configuration: TN-S
• Nominal voltage: 230 / 400 V AC
• Max continuous operating voltage: 255 V AC
• Total lightning impulse current (10/350 µs): 50 kA
• Nominal discharge current (8/20 µs): 20 kA
• Max discharge current (8/20 µs): 50 kA
• Voltage protection level: ≤ 1.5 kV
• Follow current extinguishing capability: 50 kA rms
• Short-circuit withstand capability: 50 kA rms
• Number of poles: 3+1
• Mounting: 35 mm DIN rail
• Degree of protection: IP20
• Operating temperature range: -40 °C to +80 °C

Our verdict

The DEHN 951400 is a robust and efficient surge protection solution for TN-S systems, combining high discharge capacity with reliable spark gap technology. Its modular design and integrated thermal disconnector make it a safe choice for industrial and commercial applications.