DEHN BCO ML2 BD HF 5 Modular Combined Surge Arrester for 1 Pair (VDSL2/ADSL2+) 927271

The DEHN BCO ML2 BD HF 5 stands out as a modular combined surge arrester engineered specifically for one double wire (one pair) on VDSL2 and ADSL2+ telecommunication lines. Its 5 V DC nominal voltage and 5.5 V DC maximum continuous operating voltage make it a precise match for sensitive broadband interfaces, while the high-frequency design up to 30 MHz preserves signal integrity with minimal insertion loss.

Highlights

• Protects one pair (2-wire) on VDSL2 / ADSL2+ lines
• Nominal voltage 5 V DC; max continuous operating voltage 5.5 V DC
• Nominal discharge current 1 kA (8/20 µs); max discharge current 2.5 kA (8/20 µs)
• Voltage protection level line-line ≤ 15 V (C3); line-earth ≤ 600 V (C3)
• Frequency range up to 30 MHz; insertion loss < 0.3 dB; return loss > 20 dB
• Screw terminals; surface mounting; IP65 enclosure; UV-resistant thermoplastic housing

In daily use

Installation is straightforward with screw terminals and surface mounting. The IP65-rated, UV-resistant housing withstands outdoor and harsh indoor environments, and the operating temperature range of -40 °C to +80 °C ensures reliable performance in extreme conditions. The arrester's low insertion loss and high return loss keep broadband signals clean, avoiding degradation of VDSL2/ADSL2+ connections.

Full specifications

• Product type: Combined surge arrester
• Application: VDSL2 / ADSL2+ telecommunication lines
• Number of protected pairs: 1 (2-wire)
• Nominal voltage (Un): 5 V DC
• Max continuous operating voltage (Uc): 5.5 V DC
• Nominal discharge current (In) (8/20 µs): 1 kA
• Max discharge current (Imax) (8/20 µs): 2.5 kA
• Voltage protection level line-line (Up): ≤ 15 V (C3)
• Voltage protection level line-earth (Up): ≤ 600 V (C3)
• Frequency range: Up to 30 MHz
• Insertion loss (aE): < 0.3 dB at 30 MHz
• Return loss (aR): > 20 dB at 30 MHz
• Connection type: Screw terminals
• Mounting type: Surface mounting (wall)
• Enclosure protection rating: IP65
• Operating temperature range: -40 °C to +80 °C
• Standards compliance: IEC 61643-21, EN 61643-21
• Housing material: UV-resistant thermoplastic

Final note

The DEHN BCO ML2 BD HF 5 delivers reliable surge protection for broadband telecommunication lines without compromising signal quality, making it a solid choice for critical VDSL2/ADSL2+ installations.