DEHN DEHNguard M TN ACI 275 FM Type 2 Surge Arrester 2-Pole 275V with Remote Signalling 952220

Type 2 surge arrester from DEHNguard M series, designed for protection of low-voltage systems in TN-S and TT configurations. The DEHNguard M TN ACI 275 FM features integrated ACI backup fuse technology and remote signalling contact for status monitoring.

Advantages

Compact 2-module design saves space on DIN rail. Integrated backup fuse eliminates need for separate fuse. Remote signalling contact enables monitoring of arrester status. High discharge capacity of 40 kA provides robust protection.

Suitable for

• Protection of electrical installations in residential and commercial buildings
• Use in TN-S and TT earthing systems
• Applications requiring remote monitoring of surge protection status

Key specifications

• Type: Type 2 surge arrester
• 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: ≤ 1.2 kV
• Response time: ≤ 25 ns
• Integrated backup fuse: Yes (ACI)
• Remote signalling contact: Yes (FM)
• Mounting: DIN rail 35 mm
• Module width: 2 TE (36 mm)
• Degree of protection: IP20
• Operating temperature: -40 °C to +80 °C

Recommendations

Install this arrester at the sub-distribution board to protect downstream equipment from surges. Ensure proper coordination with upstream Type 1 arresters if required.