Siemens 3RT2025-1BB40 Power Contactor 3P 17A 7.5kW 24V DC

The Siemens 3RT2025-1BB40 is a 3-pole SIRIUS power contactor rated 17 A and 7.5 kW at 400 V in AC-3 duty. Operated by a 24 V DC coil, it includes 1 NO + 1 NC auxiliary contacts in a size S0 frame with screw terminals, suitable for motor switching at operating voltages up to 690 V.

Technical specifications:

• MLFB: 3RT2025-1BB40
• Manufacturer: Siemens
• Product line: SIRIUS
• Product type: Power contactor
• Size: S0
• Number of poles: 3
• Rated current (AC-3, 400 V): 17 A
• Rated current (AC-3, 690 V): 13 A
• Rated current (AC-1, 400 V, 40C): 40 A
• Operating power (AC-3, 400 V): 7.5 kW
• Operating power (AC-3, 690 V): 11 kW
• Operating voltage (AC-3, max): 690 V
• Control supply voltage: 24 V DC
• Coil closing and holding power: 5.9 W
• Auxiliary contacts: 1 NO + 1 NC
• Terminal type: Screw terminal
• Insulation voltage (main and auxiliary): 690 V
• Surge voltage resistance: 6 kV
• Mechanical service life: 10,000,000 operating cycles
• Ambient temperature (operation): -25 … +60C
• Ambient temperature (storage): -55 … +80C
• Installation altitude (max): 2,000 m
• Net weight: 603 g

Features and benefits:

• 24 V DC coil with operating range of 0.8 to 1.1 x rated voltage, compatible with standard PLC outputs
• Identical closing and holding power (5.9 W) simplifies control supply dimensioning
• Mechanical service life of 10,000,000 operating cycles supports high-frequency switching duty
• Integrated 1 NO + 1 NC auxiliary contacts in the base unit, avoiding a separate add-on block in many circuits

Applications:

• Switching three-phase induction motors up to 7.5 kW at 400 V in AC-3 duty
• Motor starter assemblies combined with SIRIUS overload relays or motor circuit breakers
• Pump, fan, and conveyor drive control in industrial switchgear panels
• Reversing and star-delta starter circuits requiring compact size S0 contactors

Compliant with EN/IEC 60947-4-1 and EN 60947-1. Part of the Siemens SIRIUS 3RT2 range.

Also known as: Siemens 3RT2025-1BB40, SIRIUS 3RT2 contactor 17A 24V DC, Siemens S0 power contactor 7.5kW.