The Siemens 3RT2035-3SP30 is a SIRIUS power contactor in the S2 frame size, designed for switching motor and resistive loads in industrial control panels. It mounts via screw or snap-on onto 35 mm DIN rail per DIN EN 60715, with a ±180° rotation possible on vertical surfaces and ±22.5° tilt forward/backward. The coil is rated for 175... 280 V AC, and the coil terminals are spring-type for tool-less wiring.
Lifecycle and Sourcing
The 3RT2035-3SP30 is listed at the current production stage, meaning it remains in active manufacture with no announced discontinuation. For BOM planning, this part is sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time.
Key Ratings and Their Meaning
The contactor carries an MTBF of 52 a, which translates to a mean time between failures of 52 years under typical industrial operating conditions — a strong reliability indicator for continuous-duty applications. The coil inrush current peaks at 43 A, so the control transformer and wiring must be sized to handle this momentary surge. The auxiliary switch is included (yes), enabling feedback to a PLC or status indication without an add-on block.
Dimensions and Panel Integration
Physical footprint: 114 mm height, 55 mm width, 130 mm depth. Clearances required: 10 mm upwards, 10 mm forwards, 10 mm downwards, 6 mm at the side. These clearances must be maintained for heat dissipation and arc-fault containment. The spring-type coil terminals accept 2x (0.5... 2.5 mm²) solid or stranded conductors.