The Siemens 3RT1056-2NB36 is a SIRIUS-brand power contactor in the size S6 frame, rated for 21-27.3 VDC coil supply. It carries a 10 A auxiliary contact at 24 V rated value, with spring-type coil terminals and screw fixing for panel mounting. The operating temperature range is -25 to +60 °C, and the contactor is rated for 10,000,000 mechanical cycles typical.
Screw fixing through a single 9 mm hole. Dimensions: 172 mm height, 120 mm width, 170 mm depth — plan your DIN rail gland plate and enclosure fill factor accordingly.
Maximum operating rates: 800 cycles/hour at AC-1 (resistive), 750 cycles/hour at AC-3 (motor starting), 300 cycles/hour at AC-2, and 130 cycles/hour at AC-4 (plugging/inching). Arcing time is 10-15 ms. Pickup delay is 80-90 ms at both AC and DC. For motor loads, the AC-3e rating matches the AC-3 maximum at 750 cycles/hour. The auxiliary switch is included and rated 10 A at 24 V, 2 A at 48 V, 2 A at 60 V, 1 A at 110 V.
Main power terminals accept stranded conductors from 25 to 120 mm². The coil terminals are spring-type, accepting solid or stranded 2x (0.25-2.5 mm²). Solid conductors also listed as 2x (0.25-2.5 mm²). This covers common control wiring sizes for the coil circuit.