Description
The Siemens 3RT2035-1AC20 is a heavy-duty IEC motor contactor engineered for dependable switching performance in HVAC, commercial, and light industrial applications. Built to Siemens’ exacting SIRIUS standards, this contactor provides robust, long-life operation for motor loads, compressors, fan circuits, and other demanding electrical loads.
Key Specifications
- SKU / Part Number: 3RT2035-1AC20
- Pole Configuration: 3-Pole (3P)
- Rated Current: 40A
- Coil Voltage: 24VAC
- Design Standard: IEC
- Brand: Siemens SIRIUS
Features & Benefits
- 24VAC coil voltage for compatibility with low-voltage control circuits common in HVAC systems
- 3-pole design handles three-phase motor and load switching in a compact footprint
- 40A current rating supports a wide range of motor and resistive load applications
- IEC-rated construction for internationally recognized performance and safety standards
- Siemens SIRIUS platform offers modular expandability with auxiliary contacts and overload relays
- Durable housing and contact materials designed for high cycle life and minimal maintenance
Typical Applications
- HVAC compressor and fan motor control
- Commercial refrigeration motor switching
- Industrial motor starters and control panels
- Building automation and mechanical room panel boards
The 3RT2035-1AC20 is a trusted solution for electrical contractors and HVAC technicians who require a reliable, code-compliant contactor with a low-voltage 24VAC coil. Its compatibility with the Siemens SIRIUS accessory ecosystem allows for easy integration of auxiliary contacts, surge suppressors, and overload relays to build complete motor starter assemblies.









