Railway application context
Rated for railway applications, this MCB meets the vibration, shock, and temperature cycling requirements typical of EN 50155-derived specifications for onboard power distribution. The 4-pole configuration (three phases plus neutral) suits it for three-phase auxiliary supply panels in locomotives, passenger coaches, or trackside cabinets. The C-curve avoids nuisance tripping from the magnetizing inrush of small transformers and DC/DC converters common in rail auxiliary systems.