MB1-B-34-615-1-A27-B-C is a miniature M-Series circuit breaker designed for demanding applications requiring space-saving features and snap-in front panel mounting. This dual-pole unit operates at a maximum voltage rating of 65 VDC with a general purpose current rating of 15 amps and features DC medium time delay (code 34) for reliable circuit protection. The breaker incorporates a compact, vertically mounted parallel pole construction that is UL489A listed for communications equipment and provides an interrupting capacity of 1000 amps without backup fuse. It includes a baton-style actuator with black color (code B) and push-in stud terminals (code A27), along with a bright nickel panel dress nut for secure mounting. This configuration is ideal for telecommunications equipment requiring polarity-sensitive protection in confined spaces such as single rack unit installations.