The 3RT2018-1AH02: The contactor is rated for 10 A at 24 VDC on the main contacts, and includes an integrated auxiliary switch for status feedback or interlocking. It mounts via screw or snap-on onto a 35 mm DIN rail per DIN EN 60715, making it a direct fit for standard panel layouts.
Key Ratings and What They Mean for Fit
The 10 A rating at 24 VDC is the headline figure for this Size S00 frame. This is the contactor's rated operational current for DC-1 (resistive) loads at that voltage — meaning it can switch a 24 VDC resistive circuit up to 10 A continuously. For DC motor or inductive loads, the switching capacity derates significantly: 2 A at 48 V, 0.3 A at 220 V, and 0.2 A at 440 V, so verify the load type and voltage against these curves before specifying. Switching frequency limits are given per duty class: up to 1,000 operations per hour for AC-1 (resistive), 750/h for AC-2 and AC-3 (motor starting), and 250/h for AC-4 (plugging/inching). These are mechanical endurance limits for the contactor's design; exceeding them accelerates wear on the main contacts. The contactor accepts solid or stranded conductors from 0.5 to 4 mm², with dual-wire capability for 2x 0.5...1.5 mm² or 2x 0.75...2.5 mm². This covers most panel wiring sizes for control circuits and smaller motor loads.
Mounting and Integration
Mounts on a 35 mm DIN rail per DIN EN 60715 via the integral snap-on feature, or can be screw-mounted to a backplate. The Size S00 footprint — 45 mm wide, 58 mm high, 73 mm deep — fits standard 45 mm modular spacing, leaving room for auxiliary contact blocks alongside. Clearance requirements: 10 mm upward, 10 mm forward, 10 mm downward, and 6 mm to the side. The mounting position is flexible — the contactor can be rotated ±180° on a vertical surface and tilted forward/backward by ±22.5°, which helps in tight enclosures or angled subpanels. Operating temperature range is -25 to +60 °C, with storage from -55 to +80 °C. The arcing time is 10...15 ms at AC, and the pick-up/drop-out time is 4...15 ms at AC — fast enough for most sequencing but not for high-speed synchronous switching.