SIRIUS Power Contactor, Size S12 — 3RT1076-6SF36
It is screw-fixed to the mounting surface, with a vertical mounting surface that is +/-90° rotatable and +/-22.5° tiltable front-to-back, giving panel builders flexibility in enclosure layout. The coil is rated for 96 to 127 V AC, with a pickup threshold of 0.8 times the rated value and a dropout of 0.4 times the rated value at both 50 and 60 Hz. Its MTBF is listed at 75 a, indicating a long service life under rated conditions. Power terminals accept stranded cable from 70 up to 240 mm². The coil connection uses screw-type terminals accepting 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or max 2x (0.75 to 4 mm²) solid or stranded wire. Auxiliary contacts are present, rated at 10 A at 24 V, 2 A at 48 V, and 2 A at 60 V. The contactor's typical mechanical life is 10,000,000 operations.
Duty Class and Switching Frequency
Switching frequency depends on the duty class: AC-1 (resistive) and AC-3 (motor start/run) both allow up to 200 operations per hour, AC-2 (slip-ring motor) allows 170 ops/h, and AC-4 (plugging/reversing/inching) is limited to 130 ops/h. AC-3e matches AC-3 at 200 ops/h.
Dimensions and Mounting Clearances
The contactor measures 160 mm wide, 214 mm high, and 225 mm deep. Fixing is via one hole of 11 mm diameter.