What the AC-1 rating means for your load
The 3RF3330-1AA02: The 30 A AC-1 rating at 40 °C tells you this contactor is sized for resistive or slightly inductive loads — heaters, ovens, lighting banks. AC-1 is the thermal current rating through closed contacts; it is not the motor-switching current. For a 3-phase induction motor you would derate to the AC-3 category, which is typically about half the AC-1 figure. If your BOM calls for switching a resistive load up to 30 A, this part fits without derating.
Control voltage flexibility
The control supply accepts 24-230 V AC or 24 V DC — a wide-range input that simplifies panel wiring when the control voltage is not yet finalized. No need to order a separate coil variant for 24 VDC vs 230 VAC lines; one part covers both. The screw terminal connection matches standard panel practice.
Compliance documentation
RoHS compliant since 15 January 2024. No UL or CSA listing appears in the available documentation — verify with your local Siemens rep if a specific marine or UL 508 listing is required for your jurisdiction.
Packaged dimensions 105 x 27 x 122 mm — a 27 mm wide footprint that fits standard DIN-rail enclosures. Single-pole construction means it switches one phase; for three-phase loads you need three units or a 3-pole variant. The screw terminals accept standard ring or fork lugs; torque to the manufacturer's spec for the terminal size.