Description
Siemens 3RT2027-1BB40 IEC Contactor Overview
The Siemens 3RT2027-1BB40 is a robust IEC-rated power contactor engineered for demanding motor control and load-switching applications in commercial and industrial HVAC systems. With a 32-amp continuous current rating and a 24V DC control coil, this contactor integrates seamlessly into modern building automation and direct-current control circuits, eliminating the need for additional interface relays.
Key Features
- 32A rated operational current for reliable motor and load control
- 24V DC coil voltage for compatibility with low-voltage DC control systems
- 1 Normally Open (1NO) + 1 Normally Closed (1NC) integrated auxiliary contact block
- Screw-type terminal connections for secure, vibration-resistant wiring
- IEC-rated design for global compliance and compact panel footprint
- Part of the Siemens SIRIUS 3RT2 contactor family — industry-proven reliability
Electrical Specifications
- Rated Current: 32A
- Control Coil Voltage: 24V DC
- Auxiliary Contacts: 1NO / 1NC
- Terminal Type: Screw terminals
- Product Series: Siemens SIRIUS 3RT2
- SKU: 3RT2027-1BB40
Typical Applications
- HVAC compressor and motor starters
- Fan and blower motor switching
- Pump motor control panels
- Building automation and BAS panel integration
- Industrial and commercial load switching
Why Choose the Siemens 3RT2027-1BB40?
The SIRIUS 3RT2 series is recognized worldwide for its compact design, long electrical service life, and ease of installation. The 24V DC coil makes this contactor ideal for integration with PLCs, building automation controllers, and low-voltage DC control systems without additional signal conditioning. The built-in 1NO/1NC auxiliary contacts provide immediate feedback for control logic and safety interlock circuits, while screw terminals ensure a dependable connection in high-vibration environments.
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