Combination arrestor, 1-pole with function display

Combination arrestor, 1-pole, for use in TN and TT networks:

MCD 50-B-OS: Coordinated lightning current arrestor, Type 1 (Class B) to EN 61643-11 with visual function display. For interface 0 to 2 (LPZ) in accordance with lighting protection zone concept to IEC 61312-1 and/or DIN VDE 0185-305.

• Arresting capacity 50 kA (10/350 µs) per pole
• Power consumption • Protection level • Line follow current quenching 25 kA Ipeak
• lncl. plug caps for identifying the connections
• Encapsulated, non-extinguishing spark gap
• Can be used in standard distributor housings.

Application example: Compact surge protection concepts and installations of requirement class B+C arrestors in a distributor without decoupling inductances and/or line lengths, e.g. direct on mobile radio system.

Connection options


Nominal voltageUN230
SPD to EN 61643-11Type 1
SPD to IEC 61643-11class I
Lightning protection zone LPZ0→2
Impulse discharge current (10/350)Iimp50
Total discharge current (10/350)Itotal50
Nominal discharge current (8/20)In50
Arrestor surge current (8/20) [total]ITotal 8/2050
Voltage protection levelUp1
Response timetA
Follow current quenching capacity (eff) [N-PE]Ifi25
Maximum back-up fuse500
Temperature rangeϑ-40-85
Division unit TE (17.5 mm)2
Protection ratingIP20
Connection cross-section rigid10-50
Connection cross-section, multi-wire10-35
Connection cross-section, flexible10-25