Siemens 3RT2026-1BB44 Power Contactor 3P 25A 11kW 24V DC 2NO+2NC

The Siemens 3RT2026-1BB44 is a 3-pole SIRIUS power contactor rated 25 A (AC-3) and 11 kW at 400 V with a 24 V DC control coil. It includes a removable auxiliary switch block with 2 NO + 2 NC contacts and screw terminals in size S0.

Technical specifications:

• MLFB: 3RT2026-1BB44
• Manufacturer: Siemens
• Product line: SIRIUS
• Product type: Power contactor (3RT2)
• Size: S0
• Poles: 3
• Rated current (AC-3, 400 V): 25 A
• Rated current (AC-1, 400 V, 40°C): 40 A
• Operating power (AC-3, 400-690 V): 11 kW
• Max operating voltage (AC-3/AC-3e): 690 V
• Control supply voltage: 24 V DC
• Control voltage range: 0.8 to 1.1 x rated
• Auxiliary contacts: 2 NO + 2 NC, removable
• Terminal type: Screw terminal
• Insulation voltage (main and auxiliary, pollution degree 3): 690 V
• Surge voltage resistance: 6 kV
• Operating temperature: -25 to +60°C
• Storage temperature: -55 to +80°C
• Installation altitude: max 2000 m
• Mechanical service life: 10,000,000 operating cycles
• Max operating frequency (AC-3): 750/h
• Power loss (AC-3, hot state): 5.7 W
• Net weight: 648 g

Features and benefits:

• Removable auxiliary switch block with 2 NO + 2 NC contacts for flexible control circuit wiring
• Wide operating range: -25 to +60°C ambient temperature and up to 2000 m installation altitude
• Mechanical service life of 10,000,000 cycles for long-term use in high-cycle applications
• Coil power consumption of 5.9 W (closing and holding) for efficient 24 V DC control

Applications:

• Three-phase squirrel-cage motor switching up to 11 kW at 400 V (AC-3 duty)
• Motor starting and plugging control (AC-4 duty, rated 9 A at 400 V for 200,000 cycles)
• Switching of electric discharge lamp loads (AC-5a, 35.2 A up to 690 V)
• Transformer switching in building services and industrial installations (AC-6a duty)

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

Also known as: Siemens 3RT2026-1BB44, SIRIUS 3RT2 25A power contactor, Siemens S0 24V DC contactor.