Siemens 3RT2027-1BB40 Power Contactor 3P 32A 15kW 24V DC Coil

The Siemens 3RT2027-1BB40 is a SIRIUS 3RT2 3-pole power contactor rated 32 A / 15 kW at 400 V under AC-3 and AC-3e utilization categories with a 24 V DC control coil. It is size S0 with 1 NO + 1 NC auxiliary contacts on screw terminals, covering main circuit voltages up to 690 V across AC and DC utilization categories.

Technical specifications:

• MLFB: 3RT2027-1BB40
• Manufacturer: Siemens
• Product line: SIRIUS
• Product type: Power contactor (3RT2)
• Size: S0
• Poles: 3
• Rated current (AC-3, 400 V): 32 A
• Rated current (AC-3, 690 V): 21 A
• Rated current (AC-1, 400 V, 40°C): 50 A
• Operating power (AC-3, 400 V): 15 kW
• Operating power (AC-3, 690 V): 18.5 kW
• Maximum operating voltage (AC-3/AC-3e): 690 V
• Control supply voltage: 24 V DC
• Coil closing power: 5.9 W
• Coil holding power: 5.9 W
• Auxiliary contacts: 1 NO + 1 NC
• Terminal type: Screw terminal
• Insulation voltage (main and auxiliary circuits): 690 V
• Surge voltage resistance (main and auxiliary circuits): 6 kV
• Mechanical service life: 10,000,000 operating cycles
• Operating frequency (AC-3): max 750 1/h
• Operating temperature: -25 to +60°C
• Storage temperature: -55 to +80°C
• Installation altitude: max 2000 m above sea level
• Weight: 611 g

Features and benefits:

• Mechanical service life of 10,000,000 operating cycles reduces maintenance intervals
• Equal closing and holding power (5.9 W) keeps DC coil energy consumption constant throughout operation
• Covers AC-1, AC-3, AC-3e, AC-4, AC-5a, AC-5b, AC-6a, DC-1, DC-3, and DC-5 utilization categories
• 6 kV surge voltage resistance on both main and auxiliary circuits provides protection against transients
• Wide operating temperature range (-25 to +60°C) supports use in demanding installation conditions

Applications:

• Switching squirrel cage motors (AC-3/AC-3e) up to 15 kW at 400 V
• Resistive and slightly inductive load switching (AC-1) up to 50 A
• DC load control using single or series current paths up to 600 V
• Motor starter assemblies in industrial control panels
• Capacitor bank switching (AC-6a) up to 690 V

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

Also known as: Siemens 3RT2027-1BB40, SIRIUS 3RT2 power contactor 32A, Siemens 3RT2 contactor 24V DC coil.