The 3RT5934-5BF41: Because the lifecycle stage is current, this coil is not subject to last-time-buy windows or phase-out notices. The coil mounts directly into a SIRIUS size S2 contactor frame — no adapter or bracket needed. The screw connection matches the existing terminal blocks in most panels, so a swap requires only disconnecting the old coil and wiring the new one at the same terminals.
What the 110 V DC rating means
The 110 V DC control voltage is the nominal coil rating. In a DC control circuit, the coil draws a steady current once energized — no inrush peak from an AC coil's inductance swing. This matters for the DC supply sizing: the coil's holding power (not listed here, but typically around 15 W for SIRIUS size S2) determines the continuous load on the 110 V DC bus. Verify that your DC power supply can sustain that draw without droop, especially if multiple coils are energized simultaneously.