DEHN Modular Combined Arrester for 2 Single Wires BCO ML2 BE 24 (927224)

The DEHN BCO ML2 BE 24 is a modular combined arrester engineered for protecting two single wires in information technology systems. Unlike basic surge protectors that only handle common-mode disturbances, this unit provides coordinated protection for both common-mode and differential-mode surges, ensuring sensitive data lines remain operational even under transient overvoltage conditions. Its plug-in modular design allows for quick replacement of protection modules without disconnecting the wiring, minimizing downtime in critical installations.

Highlights

• Protects 2 single wires in data and signal circuits
• Nominal voltage 24 V DC, max continuous operating voltage 28 V DC
• High discharge capacity: 10 kA per line (8/20 µs), 20 kA total
• Low voltage protection level ≤150 V at nominal discharge current
• Wide operating temperature range: -40 °C to +80 °C
• Mounts on 35 mm DIN rail, screw terminal connection

In daily use

Install the BCO ML2 BE 24 at the entry point of data lines to shield downstream equipment from surge damage. Its compact thermoplastic housing fits standard distribution boards, and the screw terminals accept solid or stranded conductors up to 2.5 mm². The module can be replaced without tools after a surge event, restoring protection quickly. With a cut-off frequency of 100 MHz, it is suitable for high-speed data transmission up to 100 Mbit/s without signal degradation.

Full specifications

• Product type: Modular combined arrester
• Application: Information technology systems (data lines)
• Number of protected lines: 2 (single wires)
• Nominal voltage (Un): 24 V DC
• Max. continuous operating voltage (Uc): 28 V DC
• Nominal discharge current per line (8/20 µs): 10 kA
• Total nominal discharge current (8/20 µs): 20 kA
• Voltage protection level at In: ≤150 V
• Voltage protection level at 1 kV/µs (C3): ≤60 V
• Cut-off frequency at 100 Ω: 100 MHz
• Series resistance per line: 0.5 Ω
• Operating temperature range: -40 °C to +80 °C
• Connection type: Screw terminals
• Mounting type: 35 mm DIN rail
• Degree of protection: IP20
• Housing material: Thermoplastic
• Standards compliance: IEC 61643-21, EN 61643-21

Final note

For reliable surge protection in data networks, the DEHN BCO ML2 BE 24 offers a robust solution with easy maintenance and proven performance.