Description
The Siemens 3RT1056-6AF36 is a heavy-duty IEC contactor engineered for demanding industrial and commercial electrical applications. Built on the robust S6 frame platform, this contactor delivers reliable switching performance at 185 amps across three poles, making it well-suited for motor control, HVAC equipment, and large load switching tasks.
Coil & Control Voltage
The 3RT1056-6AF36 features a versatile 120V AC/DC coil, offering flexibility across both AC and DC control circuits without the need for separate coil variants. This dual-voltage compatibility simplifies panel design and reduces spare parts inventory.
Auxiliary Contacts
Integrated auxiliary contacts provide immediate feedback and interlocking capability right out of the box:
- Two (2) Normally Open (NO) auxiliary contacts
- Two (2) Normally Closed (NC) auxiliary contacts
This 2NO + 2NC configuration supports a wide range of control, signaling, and safety interlock schemes without requiring additional add-on contact blocks.
Key Specifications
- SKU / Part Number: 3RT1056-6AF36
- Brand: Siemens
- Coil Voltage: 120V AC / 120V DC
- Number of Poles: 3
- Current Rating: 185 Amps
- Frame Size: S6
- Terminal Type: Screw Terminals
- Auxiliary Contacts: 2 Normally Open (NO) + 2 Normally Closed (NC)
- Contactor Type: IEC
Design & Construction
- IEC-rated design for consistent global performance standards
- S6 frame size accommodates high-amperage industrial loads
- Screw terminal connections ensure secure, vibration-resistant wiring
- Compact, modular construction for straightforward panel integration
Typical Applications
- Commercial and industrial HVAC motor control
- Large fan and pump motor switching
- Compressor and chiller control panels
- Industrial automation and motor control centers (MCCs)
- Building automation and energy management systems
The Siemens 3RT1056-6AF36 combines proven IEC contactor technology with a practical 120V AC/DC coil and built-in auxiliary contacts, delivering a reliable, all-in-one switching solution for high-current electrical control applications.
