What it is and where it fits
The 3RT2017-1JB42: Mounting is via screw and snap-on onto 35 mm DIN rail per DIN EN 60715, so it integrates directly into a standard control-panel rail without adapters. The 45 mm width and 73 mm depth match the S00 footprint, leaving room for adjacent devices on the same rail.
Key ratings and what they mean for fit
The coil is rated 24 V DC, and the magnet coil termination uses screw-type terminals. That means you need a 24 V DC control supply, and the screw terminals accept solid or stranded wire from 0.5 to 4 mm² — standard for panel wiring. The contactor pulls in within 38 to 65 ms on DC and arcs in 10 to 15 ms; those timing figures matter if you are coordinating with other devices in a sequence. Main contact ratings are given at several DC voltages: 10 A at 24 V, 2 A at 48 V and 60 V, 1 A at 110 V, 0.9 A at 125 V, 0.3 A at 220 V, and 3 A at 400 V. These are the DC-1 or DC-13 style resistive/inductive loads the contactor can break — so if your load is a DC solenoid or small DC motor at 24 V, it handles 10 A; at higher voltages the current limit drops sharply. No auxiliary switch is built into this base unit, so if you need a feedback contact for the PLC, you will add an auxiliary contact block separately. Switching frequency limits depend on the duty class: 1000 cycles/hour at AC-1 (resistive), 750 at AC-2 and AC-3 (motor starting/running), and 250 at AC-4 (plugging/inching). For a motor switching application at AC-3, that is 750 operations per hour — enough for most conveyor or pump duty cycles. The typical mechanical life is 30 million operations, so the contactor itself outlasts most application cycles before wear. The operating temperature range is -25 to +60 °C, storage from -55 to +80 °C. The mounting position allows +/-180° rotation on a vertical surface and +/-22.5° tilt forward/backward, which gives flexibility in tight enclosures. Spacing requirements are 10 mm upward/downward/forward, 6 mm at the side — so plan for those clearances to avoid heat buildup.