Lifecycle and Sourcing Reality
The 3RT5934-5AC21: For a BOM freeze or a line-down replacement, this coil is quoted to order against the required quantity. Availability and current pricing are confirmed at RFQ time through authorized industrial distribution.
What This Coil Is and Where It Fits
This is a SIRIUS magnet coil — the control-side component that energizes the contactor armature. It is the replacement or spare for any SIRIUS contactor that takes a 24 V AC coil with screw-terminal connections. Rated 24 V AC at both 50 Hz and 60 Hz, with an operating range of 0.8 to 1.1 times the rated voltage at 50 Hz. That means the coil pulls in reliably between about 19 V and 26 V AC — a typical tolerance for industrial control transformers.
Mounting and Integration Notes
Screw-terminal connection — no special tooling needed for panel wiring. The coil snaps onto the contactor yoke; verify the mechanical interlock and the armature gap are within spec before applying control voltage.