The Siemens 3RT1017-2JB41 is a SIRIUS S00-size power contactor with a 24 VDC coil, rated to switch 10 A in AC-12 duty. It carries spring-loaded terminals for the main circuit and an integrated diode surge suppressor across the coil — no external flywheel diode needed on the panel wiring.
Coil and switching ratings
Switching capacity drops with voltage: 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, and 0.3 A at 220 V. For motor loads at 400 V, the contactor is rated 5.5 kW in AC-2 duty and 8.5 A in AC-4 (reversing or inching). At 690 V it still handles 5.5 kW, which matters for 690 V distribution systems common in mining or marine panels.
The spring-loaded terminals accept 2x (0.25 to 2.5 mm²) solid or stranded, or 2x (24 to 14 AWG).