Siemens 3RT2026-1BB40 Power Contactor 25A 11kW 3P 24V DC

The Siemens 3RT2026-1BB40 is a 3-pole SIRIUS power contactor rated at 25 A and 11 kW at 400 V for AC-3/AC-3e duty. Operated by a 24 V DC coil, it features a 1 NO + 1 NC auxiliary contact arrangement with screw terminal connections in a size S0 frame. The contactor switches loads at operating voltages up to 690 V AC.

Technical specifications:

• MLFB: 3RT2026-1BB40
• Manufacturer: Siemens
• Product line: SIRIUS
• Product type designation: 3RT2
• Contactor size: S0
• Main poles: 3
• Rated current at AC-3 / 400 V: 25 A
• Rated power at AC-3 / 400 V: 11 kW
• Maximum operating voltage (AC-3/AC-3e): 690 V
• Control supply voltage: 24 V DC
• Auxiliary contacts: 1 NO + 1 NC
• Insulation voltage: 690 V (pollution degree 3)
• Surge voltage resistance: 6 kV
• Terminal type: screw terminal
• Mechanical service life: 10,000,000 operating cycles
• Ambient operating temperature: -25 to +60 °C
• Maximum installation altitude: 2,000 m
• Net weight: 605 g

Features and benefits:

• Mechanical service life of 10,000,000 cycles supports long-term operation in demanding continuous duty applications
• 24 V DC coil with a 0.8 to 1.1 x rated voltage operating range allows direct connection to PLC outputs
• Integrated 1 NO + 1 NC auxiliary contacts enable interlocking and feedback signalling without an additional block
• 6 kV surge voltage resistance on both main and auxiliary circuits provides protection against transient overvoltages
• Operating temperature range of -25 to +60 °C and altitude rating to 2,000 m suit varied installation conditions

Applications:

• Switching three-phase motors up to 11 kW at 400 V in AC-3/AC-3e continuous duty
• AC-4 inching and plugging duty up to 4.4 kW at 400 V for approximately 200,000 operating cycles
• Motor starter circuits with interlocking, using the integrated 1 NO + 1 NC auxiliary contact
• DC load switching at up to 600 V across single or multiple current paths in series

Compliant with EN 60947-1. Part of the Siemens SIRIUS 3RT2 range.

Also known as: Siemens 3RT2026-1BB40, SIRIUS 3RT2 power contactor 25A 24V DC.