Siemens 3RT6028-1BB40 SIRIUS 3-Pole Power Contactor 38A AC-3 18.5kW 400V 24V DC Coil 1NO+1NC Screw Terminal S0

Product Description

The Siemens 3RT6028-1BB40 is a 3-pole power contactor from the SIRIUS 3RT6 series, designed for reliable motor control and power switching in industrial automation applications
. Rated at 38A in AC-3 duty at 400V, this contactor delivers 18.5kW motor power. The coil operates at 24V DC with a power consumption of 5.9W. The contactor features a 3NO main contact configuration with built-in 1NO+1NC auxiliary contacts. Housed in size S0 with screw terminals, this contactor is suitable for applications including motor starting and stopping, pump control, fan control, compressor control, conveyor systems, and heavy-duty industrial equipment. Designed to meet IEC/EN 60947-1 and EN 60947-4-1 standards, the 3RT6028-1BB40 delivers dependable performance for control panels and industrial machinery

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Standard Features

• SIRIUS 3RT6 Series design: Modular system offering high contact reliability and compact design for optimizing motor control and protection schemes[reference:7].
• 38A AC-3 rated current: Supports motor control up to 18.5kW at 400V and 21A at 690V three-phase[reference:8][reference:9].
• 24V DC coil: Low-voltage DC control for compatibility with PLC and automation systems, with 5.9W power consumption[reference:10].
• Built-in auxiliary contacts: Integrated 1NO+1NC auxiliary contacts for control logic and feedback signaling without additional modules[reference:11].
• Size S0 compact footprint: Space-efficient design for easy panel integration, with 3.8W power loss per pole in thermal operation[reference:12].
• Screw terminal connections: Facilitates straightforward and secure wiring in control cabinets[reference:13][reference:14].
• High contact reliability: Auxiliary contacts ensure extremely reliable switching (≤1 failure per 100 million operations at 17V, 1mA)[reference:15][reference:16].
• Wide operating temperature range and global certifications: Climate-tested design suitable for worldwide applications, with finger protection per EN 50274[reference:17][reference:18].

Technical Specifications