The Siemens 3RT2526-1AK60 is a current-production SIRIUS contactor in the S0 frame — the same size that's been out here in the grease on motor starters and across-the-line applications for years. Screw-type terminals with wire capacity 2x (0.5...1.5 mm²) and 2x (0.75...2.5 mm²) handle the solid or stranded conductors you're used to pulling. Coil is wound for 110 V at 50 Hz and 120 V at 60 Hz, so it's a direct fit in panels fed by a common 110/120 V control transformer, no adapter needed. Mechanical life is 10 million operations typical; the auxiliary switch is built in. Switching frequency maxes out at 1 000 cycles per hour under AC-1 resistive load, or 1 500 at DC coil loads. Arc time sits between 10 and 10 ms, consistent with a fast, clean break.
Mounts on 35 mm DIN rail per DIN EN 50022 — screw or snap-on, your call. The mounting position is generous: ±180° rotation on a vertical surface, plus forward/backward tilt by ±22.5°. That flexibility helps when you're squeezing this into a retrofitted cabinet where the rail is already half full. Dimensions are 61 mm wide, 85 mm tall, 97 mm deep — the S0 footprint, so it plays nice with other S0 accessories like overload relays and bus bars. The operating temperature is -25 to +60 °C, and the storage temperature is -55 to +80 °C.
For compliance, the brand (SIRIUS) generally ships with CE, RoHS, and REACH declarations; if your QA needs copies, flag it on the RFQ and we'll attach them with the offer.