SIRIUS power contactor, S0 frame — 7.5 kW AC-2 at 400 V
The Siemens 3RT1025-1AP60 is a SIRIUS power contactor in the S0 frame size, rated for 7.5 kW at AC-2 duty on 400 V and 15.5 A at AC-4 on 400 V. That AC-2 rating covers wound-rotor motor switching — the AC-4 figure handles reversing and plugging duty cycles where the contactor makes and breaks full locked-rotor current. The main contacts use screw-type terminals, and the coil is controlled at 24 VDC (10 A rated current at 24 V). Mounting is screw or snap-on onto 35 mm DIN rail per EN 50022, with side-by-side mounting permitted. The 45 mm width fits standard panel layouts. Operating temperature range is -25 to +60 °C, with a maximum altitude of 2,000 m. Pollution degree 3 means it's suited for industrial environments with conductive contamination. This is a current-production part (lifecycle stage: current). Sourced and quoted to order against an RFQ through independent distribution — availability and current pricing confirmed at quote time.
Wiring and protection coordination
Main circuit terminals accept solid or stranded conductors: 2x (0.5–1.5 mm²), 2x (0.75–2.5 mm²), max 2x (0.75–4 mm²) for the control circuit; 2x (1–2.5 mm²), 2x (2.5–6 mm²), max 2x 10 mm² for the main current circuit. AWG equivalents: 2x (16–12), 2x (14–10), 1x 8 for main contacts. For type 2 coordination (no-weld protection), use gL/gG fuses rated 25 A; for type 1 coordination (allow contactor damage but clear fault), use 63 A gL/gG. Auxiliary contact ratings span 10 A at 24 V down to 0.3 A at 220 V — enough for PLC or relay interface. Mechanical endurance is 10 million operations typical, so it's a fast mover for high-cycle applications like conveyor or pump control.
Compliance and documentation
The 3RT1025-1AP60 carries IP20 protection on the front and IP00 at the terminal body itself. Standard compliance documentation (RoHS, REACH, UL, IEC) is available through the Siemens SIRIUS line.