DEHN 927225 BCO ML2 BE 48 Modular Combined Arrester for 2 Single Conductors

The DEHN BCO ML2 BE 48 stands out as a modular combined arrester engineered for protecting measurement and control systems, particularly analogue and digital interfaces. Unlike basic surge protectors that handle only common-mode surges, this unit provides comprehensive protection for a pair of conductors with both line-to-line and line-to-earth suppression, ensuring signal integrity in demanding industrial environments.

Highlights

• Protects 2 conductors (1 pair) in measurement and control circuits
• Nominal voltage 48 V DC, max continuous operating voltage 53 V DC
• High discharge capacity: 10 kA (8/20 µs) nominal, 2.5 kA (10/350 µs) impulse per line
• Low voltage protection levels: ≤250 V line-line, ≤600 V line-PE
• Wide bandwidth with cut-off frequency 10 MHz and insertion loss ≤0.3 dB at 10 MHz
• Low capacitance ≤100 pF, suitable for high-frequency signals
• Robust IP65 housing, UV-resistant thermoplastic, for harsh environments
• Operating temperature range -40 °C to +80 °C

In daily use

Installed via screw terminals and surface mounting, the BCO ML2 BE 48 integrates seamlessly into control cabinets or field enclosures. Its IP65 rating allows installation in dusty or wet locations without additional protection. The arrester's low capacitance and high cut-off frequency ensure that even fast analogue signals or digital data streams pass through without distortion, while powerful surge handling keeps sensitive electronics safe from lightning-induced transients.

Full specifications

• Product type: Modular combined arrester
• Application: Measurement and control systems, analogue/digital interfaces
• Number of conductors: 2 (1 pair)
• Nominal voltage (Un): 48 V DC
• Max continuous operating voltage (Uc): 53 V DC
• Nominal discharge current (In): 10 kA (8/20 µs)
• Impulse discharge current (Iimp): 2.5 kA (10/350 µs) per line
• Voltage protection level (Up) line-line: ≤250 V
• Voltage protection level (Up) line-PE: ≤600 V
• Cut-off frequency (fg): 10 MHz (at 100 Ω)
• Insertion loss (aE): ≤0.3 dB (at 10 MHz)
• Capacitance (C) line-line: ≤100 pF
• Capacitance (C) line-PE: ≤100 pF
• Connection type: Screw terminals
• Mounting type: Surface mounting (wall mounting)
• Housing material: Thermoplastic, UV resistant
• Operating temperature range: -40 °C to +80 °C
• Protection degree: IP65

Final note

The DEHN BCO ML2 BE 48 delivers reliable surge protection for critical signal lines without compromising signal quality, making it an essential component for industrial automation and process control applications.