DEHN BXT ML2 BDS24 Combined Lightning Current and Surge Arrester Module Type 2 24V DC 2-Pole DIN Rail 920244

Protecting 24 V DC control and instrumentation circuits from surge damage is critical in industrial environments. The DEHN BXT ML2 BDS24 combined arrester module provides reliable protection against transient overvoltages, ensuring uptime for sensitive equipment.

Who is it for

Electrical engineers, panel builders, and maintenance teams who need a compact, DIN-rail mountable surge protection device for two-wire DC systems. It is suitable for use in control cabinets, automation systems, and measurement circuits where space is limited and performance is essential.

Main features

• Type 2 / Class II surge protection according to IEC 61643-11
• Nominal voltage 24 V DC, maximum continuous operating voltage 30 V DC
• High discharge capacity: 20 kA nominal (8/20 µs), 40 kA maximum
• Low voltage protection level ≤ 150 V for effective equipment protection
• 2-pole design with L+/L- to PE protection mode
• Visual status indication (green/red flag) for quick inspection
• Thermal disconnect for safe end-of-life behavior
• Compact module for 35 mm DIN rail mounting

Specifications

• SPD type: Type 2 / Class II
• Nominal voltage (Un): 24 V DC
• Maximum continuous operating voltage (Uc): 30 V DC
• Nominal discharge current (In) (8/20 µs): 20 kA
• Maximum discharge current (Imax) (8/20 µs): 40 kA
• Voltage protection level (Up): ≤ 150 V
• Response time (tA): ≤ 25 ns
• Number of poles: 2
• Protection mode: L+/L- to PE
• Mounting: 35 mm DIN rail
• Status indication: visual (green/red flag)
• Thermal disconnect: yes
• Degree of protection: IP20
• Operating temperature range: -40 °C to +80 °C
• Connection cross-section solid: 1.5 - 25 mm²
• Connection cross-section stranded: 1.5 - 16 mm²
• Short-circuit withstand capability (Isccr): 50 kA
• Standards: IEC 61643-11, EN 61643-11
• Housing material: thermoplastic

Tips

Install the module as close as possible to the protected equipment to minimize lead lengths and improve protection. Check the status indicator regularly and replace the module if the flag shows red. Ensure proper grounding of the DIN rail for effective surge diversion.