The Siemens 3RV1923-1GA00-0FJ0 is a moulded-plastic IP55 enclosure fitted with an emergency stop rotary actuator, purpose-built to house circuit-breakers of size S0. Construction width is 72 mm, and it includes N and PE terminals — so the enclosure arrives ready for the line-side and load-side connections, no separate terminal block to add. The IP55 rating means it handles dust ingress and water jets from any direction, which suits it for floor-level panel positions or standalone machine-mount applications where washdown or airborne particulates are a concern.
What the ratings mean for fit
The IP55 enclosure rating is the key selection parameter here: it certifies protection against dust ingress (limited ingress, no harmful deposit) and low-pressure water jets from any direction. For a panel builder, that means this enclosure can be mounted on the side of a machine or in a non-air-conditioned electrical room without a secondary cabinet — the emergency stop actuator is already integrated, so you save one panel cutout and the associated wiring gland. The 72 mm width (construction width E) matches the standard footprint for Siemens S0 frame circuit-breakers, so the enclosure slides directly onto the same DIN rail as the breaker without adaptor plates.