Siemens 3RT2026-1KB40 SIRIUS Power Contactor 3P 25A 11kW 24VDC

The Siemens 3RT2026-1KB40 is a SIRIUS 3RT2 series power contactor rated for AC-3/AC-3e duty at 25 A and 11 kW at 400 V. The 3-pole, frame size S0 unit operates from a 24 V DC control supply with an operating range of 0.7-1.25 x Uc, making it suitable for direct connection to PLC outputs. Integrated 1 NO + 1 NC auxiliary contacts and a plugged-in varistor for coil surge suppression are included as standard.

Technical specifications:

• MLFB: 3RT2026-1KB40
• Manufacturer: Siemens
• Product line: SIRIUS
• Product type: Power contactor
• Type designation: 3RT2
• Frame size: S0
• Number of poles: 3
• Rated current AC-3/AC-3e at 400 V: 25 A
• Rated current AC-1 at 400 V (40 °C): 40 A
• Operating power AC-3 at 400 V: 11 kW
• Operating power AC-3 at 230 V: 5.5 kW
• Insulation voltage (main and auxiliary circuit): 690 V
• Surge voltage resistance: 6 kV
• Control supply voltage: 24 V DC
• Control voltage operating range: 0.7-1.25 x Uc
• Coil closing/holding power: 4.5 W
• Auxiliary contacts: 1 NO + 1 NC
• Surge suppressor: plugged-in varistor
• Terminal type: screw terminal
• Ambient temperature (operation): -25 ... +60 °C
• Ambient temperature (storage): -55 ... +80 °C
• Installation altitude: max 2 000 m
• Mechanical service life: 10 000 000 operating cycles
• Net weight: 587 g

Features and benefits:

• 24 V DC coil with 0.7-1.25 x Uc operating range allows direct interfacing with PLC outputs without additional signal conditioning
• Plugged-in varistor suppresses coil voltage spikes without requiring a separate accessory
• Built-in 1 NO + 1 NC auxiliary contacts support basic control and feedback circuits in a single device
• Mechanical service life of 10 000 000 operating cycles reduces maintenance frequency in high-cycle applications
• Operating temperature range of -25 to +60 °C supports use in demanding industrial environments

Applications:

• Three-phase motor starting and stopping in AC-3/AC-3e duty cycles
• PLC-controlled motor drives in automated production machinery
• Pump, fan, and compressor motor switching in building services and process plants
• Motor starter assemblies within industrial control panels

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

Also known as: Siemens 3RT2026-1KB40, SIRIUS 3RT2 power contactor 25A 24VDC.