What this contactor is and what it does
The Siemens 3RT2028-1AV60 is a SIRIUS power contactor in size S0, rated for 34 A at 480 V in AC-3 duty — the motor-switching curve that governs most induction-motor starts and stops in industrial panels. It mounts via screw or snap-on onto 35 mm DIN rail per DIN EN 60715, and its screw-type coil and main-contact terminals accept 1 to 10 mm² solid or stranded wire. The operating temperature range of -25 to +60 °C covers most indoor panel environments, and the storage range extends to -55 to +80 °C.
What the ratings mean for fit
The 34 A at 480 V AC-3 rating is the headline number — it tells you this contactor can handle a 480 V motor load drawing up to 34 A under the switching duty of starting and stopping (AC-3). That is the rating that decides whether it fits your motor branch circuit. The auxiliary switch is included (yes), so you get a built-in N.O./N.C. set for status feedback or interlocking without adding a separate block. Mechanical life is typical 10 million operations, and the maximum switching frequency varies by duty: 1000 cycles/hour at AC-1 (resistive), 750 at AC-2 and AC-3, and 250 at AC-4 (plugging/inching). That last one is the limiting factor for high-wear applications.
Where this class is used
The mounting position is flexible: +/-180° rotation on a vertical surface, and can tilt forward/backward by +/-22.5°, so panel layout constraints are rarely a problem.
Lifecycle and sourcing reality
For a BOM line that calls out 3RT2028-1AV60, the fit is confirmed by the 34 A at 480 V AC-3 rating and the S0 frame size. This is a quoted-to-order part; we source it against an RFQ.