Part identification and key ratings
The Siemens 3RF3310-2AA04 is a 1-pole solid-state contactor from the SIRIUS 3RF33 family, rated AC-1 at 10 A with a 40 °C ambient limit. The switching voltage range is 48-460 V, and the coil is 24 V DC. Termination is via spring-loaded terminals — no screw torque to verify, which speeds panel wiring.
Packaged dimensions are 97 x 27 x 105 mm (L x W x H). The 27 mm width is a single modular DIN-rail pitch, so it occupies one position on the rail. No separate coil suppression module is needed; the DC coil is inherently suppressed.