Siemens 3RT1015-1HB42-ZW96 — AC-3 Contactor, 24 VDC Coil, Size S00
The Siemens 3RT1015-1HB42-ZW96 is a 3-pole contactor in the SIRIUS series, size S00 frame, rated for AC-3 duty at 3 kW at 400 V. The DC 24 V coil accepts a control voltage range of 0.7 to 1.25 times the rated coil voltage (US), giving it a hold range from roughly 16.8 V to 30 V DC — useful for applications with a sagging 24 V bus or long cable runs. The built-in 1 NC auxiliary contact is wired for status feedback or interlocking without an extra side-mount block. Size S00 is the smallest frame in the SIRIUS contactor family, designed for compact panel layouts on DIN rail. The screw terminals accept standard ferrule or solid conductors up to the rated cross-section for this frame class. Multi-unit packing of 90 items (arranged 2×2 layers) is the factory packaging for this suffix variant — the ZW96 code flags the bulk pack, not the standard single-unit box.
AC-3 Motor Rating and Coil Tolerance
The AC-3 rating of 3 kW at 400 V defines the contactor's capability for switching squirrel-cage motors — making and breaking currents during starting and stopping under load. At 400 V three-phase, that covers motors up to roughly 7 A full-load current. The 1 NC auxiliary is rated for the same utilization category; wire it as a mirror contact for PLC feedback or as a mechanical interlock in a reversing pair. The 24 VDC coil's 0.7...1.25*US tolerance means the contactor picks up reliably at 16.8 V and stays sealed up to 30 V. This is wider than the standard ±10% many DC coils specify, so it handles a 24 V battery-backed supply that drifts low under load or a lightly regulated power supply that runs high. No built-in suppression — add a free-wheel diode across the coil if the DC supply drives other inductive loads.
Lifecycle and Sourcing
For BOM freeze or MRO replenishment, the 3RT1015-1HB42-ZW96 is sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for your required quantity and delivery window.