4200-001-20, MS26574-15, Labinal Power Systems, Sub-Minature Circuit Breaker, 4200 series, standard version, 20 amps, High-Performance, lightweight, high interrupting capacity. Qualified to MS26574 of MIL-C-5809 4200-001-20 is a sub-miniature, lightweight, trip free, single phase 20 amp circuit breaker, which combines its compact size with a proven technological track record. A modification of the popular 4310 series, its reliability has been long established. The 4200-001-20 reacts consistently in extreme fluctuations of temperature, high shock, vibration, or humidity.