The Siemens 3RT2038-1AM20 is a SIRIUS power contactor in the S2 frame, designed for motor and resistive load switching in control panels. It carries an integrated auxiliary switch and screw-type coil terminals.
Operating cycles per hour by duty class
Maximum switching rates vary by load type: 700 ops/h for AC-1 resistive loads, 350 ops/h for AC-2 slip-ring motors, 500 ops/h for AC-3 squirrel-cage motors, and 150 ops/h for AC-4 inching/plugging. AC-3e (enhanced) matches the AC-3 rate at 500 ops/h. Arcing time spans 10 to 20 ms; making time ranges from 10 to 18 ms at AC, which affects coordination with upstream protection.
Mounting and physical fit
Fastens via screw and snap-on onto 35 mm DIN rail per DIN EN 60715. Accepts ±180° rotation on a vertical surface and ±22.5° tilt forward/backward, giving flexibility in tight enclosures. Dimensions: width 55 mm, height 114 mm, depth 130 mm. Clearances: 10 mm upward/forward/downward, 6 mm laterally.
Sourcing and lifecycle
Listed as current production – no end-of-life notice or last-time-buy indicated. The part is procured to order against the buyer's RFQ, with a firm lead time established at the quote stage.