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B1D DC 125/250Vdc (MCB)
NOARK Electric has announced the release of new UL 489 DIN rail branch circuit breakers – the Ex9-Series B1D. These new MCBs are designed to provide branch circuit protection in a variety of DC applications. They're available in 1- and 2-pole configurations with current ratings up to 63A and capacity up to 250Vdc. The B1D mounts on standard 35mm DIN rail and is offered with either box or ring-tongue terminals. Like all NOARK products, these new MCBs are covered by NOARK's exclusive 5-year limited warranty.

  • UL 489 listed DIN rail mounted miniature circuit breakers to 63A
  • Interrupting capacity 10 kA at 125Vdc and 10 kA at 250 Vdc
  • Tripping characteristic C (7~15 In), D (12~22 In)
  • Trip-free design — breaker cannot be defeated by holding handle in ON position
  • Field installable auxiliary contact, alarm contact, shunt trip and under-voltage trip
  • Available with provisions for ring tongue terminals
  • Module width of only 0.71 in (18 mm) per pole
  • Contact position indicator (red/green)
  • Possibility for locking the toggle in OFF position


UL 489 Listed

Certification File:


Compliant to:

CSA C22.2 No. 5/ IEC 60947-2

Rated Current:


Number of Poles:

1, 2

Rated Operational Voltage (50/60 Hz)


Instantaneous Tripping Type

C(7In-15In), D(12In-22In)