The SITAS 4AM3242-5AV00-0EA0 addresses a specific niche in control transformer applications: the 42VAC control voltage. While 24V dominates modern panel design and 230V persists in legacy installations, 42V occupies a defined space in European machinery standards — high enough to overcome voltage drop over moderate cable distances, low enough to be classified as safety extra-low voltage in certain contexts, and compatible with a range of legacy European control components.

Where 42V Is Used

The 42V secondary is specified in older European machine tool standards and in certain process industry applications where the control voltage must be higher than 24V for relay contact reliability over long field wiring runs, but lower than 110/230V to reduce shock hazard for maintenance personnel working on live control circuits. The transformer delivers approximately 1.5A at 42V from its 63VA continuous rating, with 190VA short-time headroom for contactor inrush.

Common SITAS Platform

Like all 63VA models in the 4AM series, this unit uses the EI 84/28 iron core in an 86×98×90mm footprint, mounts via screws or DIN rail adapter, operates at 50/60Hz, and carries CE, UL/CSA, and cRUus certifications. The ±5% primary tap (380/400/420V) allows voltage matching at installation. Thermal class B limits ambient temperature to 40°C at full load. IP00 requires in-cabinet mounting.

Key Decision Parameters

For 24V or 230V secondary options from the same 400V primary, see the 4AM3242-5AN00-0EA0 and 4AM3242-5AT10-0FA0 respectively.