Overview
The Siemens 3RT2027-1CK64-3MA0 is a high-performance, 3-pole power contactor from the globally recognized SIRIUS 3RT2 series, designed specifically for switching motors (AC-3e/AC-3 operation) and resistive loads. Engineered for reliability in industrial control applications, this Size S0 contactor offers a powerful rating of 32 A (up to 690 V) and handles motor power up to 15 kW at 400 V.
A key feature is the multi-voltage 110 V AC (50 Hz) / 120 V AC (60 Hz) control coil, which includes a plugged-in varistor for essential coil surge suppression, protecting your control circuitry. For enhanced signaling and interlocking, the unit comes standard with a captive auxiliary switch configuration of 2 Normally Open (NO) and 2 Normally Closed (NC) contacts, accessible via robust screw terminals.
Key Benefit
- Reliable Motor Protection: Integrated varistor provides effective surge suppression, extending the lifespan of the control coil and reducing system downtime.
- Space & Cost Efficiency: The compact Size S0 design saves panel space while handling a high power rating of 15 kW.
- Versatile Control: The dual-frequency 110 V AC / 120 V AC coil is suitable for use in diverse international control systems.
- Comprehensive Monitoring: The built-in 2 NO + 2 NC auxiliary contacts offer flexible options for status signaling and interlocking within your control circuit.
- Simplified Wiring: Secure and proven screw terminal connections ensure reliable and easy installation.
- Industry Standard: Part of the Siemens SIRIUS 3RT2 range, guaranteeing quality, compatibility, and availability of accessories.
Function & Application
The 3RT2027-1CK64-3MA0 is primarily used for:
- Switching 3-Phase Motors: Ideal for starting, stopping, and reversing motors in pumps, fans, conveyors, and machine tools.
- Switching Resistive Loads: Suitable for controlling heating elements and lighting systems.
- Automation & Control: Serving as a crucial link in automation panels and motor starter combinations (e.g., in combination with SIRIUS overload relays).
- Isolation: Providing a robust method of electrical isolation for maintenance.
For more of our high-quality industrial automation and control products, visit Turll today and discover the full Siemens SIRIUS range.













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