Siemens 3RT2046-1KB40 SIRIUS Power Contactor 3P 95A 45kW 24VDC

The Siemens 3RT2046-1KB40 is a SIRIUS 3RT2 series power contactor rated at 95 A and 45 kW at 400 V AC-3/AC-3e, with a 24 V DC control coil operating at 0.8-1.2x Uc. Designed for 3-pole motor control applications, it includes an integrated varistor for coil suppression and is suitable for direct PLC output switching.

Technical specifications:

• MLFB: 3RT2046-1KB40
• Manufacturer: Siemens
• Product line: SIRIUS
• Product type: Power contactor
• Frame size: S3
• Number of main poles: 3
• Rated current AC-3 at 400 V: 95 A
• Rated current AC-3 at 690 V: 78 A
• Rated current AC-1 at 400 V / 40°C: 130 A
• Rated power AC-3 at 400 V: 45 kW
• Rated power AC-3 at 690 V: 75 kW
• Operating voltage (main circuit): up to 1,000 V AC
• Control voltage: 24 V DC, 0.8-1.2x Uc
• Auxiliary contacts: 1 NO + 1 NC
• Terminal type: Screw terminal
• Integrated varistor: Yes
• Insulation voltage (main circuit): 1,000 V
• Surge voltage resistance (main circuit): 8 kV
• Operating temperature: -25 ... +60°C
• Storage temperature: -55 ... +80°C
• Installation altitude: up to 2,000 m above sea level
• Mechanical service life: 10,000,000 operating cycles
• Net weight: 1.842 kg
• Power loss at rated current (AC, hot state): 19.8 W

Features and benefits:

• Integrated varistor eliminates the need for a separate coil suppression module
• Compatible with direct PLC outputs at 24 V DC, simplifying control wiring
• 10 million cycle mechanical service life for high-durability installations
• Wide operating temperature range (-25 to +60°C) suits demanding environments
• Screw terminals accommodate up to 50 mm² minimum cross-section for main conductors
• Operates across AC-1, AC-3, AC-3e, AC-4 and DC duty categories

Applications:

• Direct-on-line starting and switching of motors up to 45 kW at 400 V
• Motor control in industrial automation systems with PLC-based control
• Reversing and star-delta starter configurations
• Transformer and capacitor switching (AC-6a/AC-6b duty)
• DC load switching in control panels and drives applications

Compliant with EN/IEC 60947-4-1 for low-voltage contactors and motor starters. Part of the Siemens SIRIUS 3RT2 range.

Also known as: Siemens 3RT2046-1KB40, SIRIUS 3RT2 contactor 95A 24VDC, Siemens S3 frame power contactor 45kW.