Siemens 3RT1055-6AP36 Power Contactor 150A 75kW 3P 220-240V AC/DC

The Siemens 3RT1055-6AP36 is a SIRIUS 3RT1 size S6 3-pole power contactor designed for AC-3e/AC-3 motor and load switching duties. Rated at 150 A and 75 kW at 400 V, it accepts a 220-240 V AC (50-60 Hz)/DC control supply and includes 2 NO + 2 NC auxiliary contacts, with busbar main circuit connections and screw-type auxiliary terminals.

Technical specifications:

• MLFB: 3RT1055-6AP36
• Manufacturer: Siemens
• Product line: SIRIUS
• Product type: Power contactor (3RT1), size S6
• Poles: 3 (3 NO main contacts)
• Rated current AC-3: 150 A at 400-690 V; 65 A at 1000 V
• Rated current AC-1 (400 V, 40°C): 185 A
• Operating power AC-3: 75 kW at 400 V; 90 kW at 500 V; 132 kW at 690 V
• Coil voltage: 220-240 V AC (50-60 Hz) / DC
• Auxiliary contacts: 2 NO + 2 NC
• Main circuit connection: busbar terminals
• Auxiliary / control circuit: screw terminals
• Insulation voltage: main circuit 1000 V / auxiliary circuit 500 V (pollution degree 3)
• Surge voltage resistance: main circuit 8 kV / auxiliary circuit 6 kV
• Operating temperature: -25 to +60°C; storage -55 to +80°C
• Maximum installation altitude: 2000 m
• Power loss (AC, hot state): 27 W total / 9 W per pole
• Mechanical service life: 10,000,000 operating cycles
• Net weight: 3.32 kg

Features and benefits:

• 150 A AC-3 rating holds constant from 400 V through 690 V, requiring no derating across standard European supply voltages
• Busbar main circuit terminals simplify installation directly onto busbar-based motor control centres and distribution assemblies
• Integrated 2 NO + 2 NC auxiliary contacts provide feedback and interlock signalling without additional add-on contact blocks
• 10,000,000-cycle mechanical service life supports high-frequency switching applications over extended service intervals
• 220-240 V AC/DC coil covers standard European control supply voltages in both AC and DC control circuits

Applications:

• Direct-on-line starting and switching of motors up to 75 kW at 400 V (AC-3 duty)
• Motor control centre feeder switching at operating voltages up to 690 V
• Star-delta and reversing starter circuits requiring coordinated contactor switching
• High-cycle industrial automation processes where extended mechanical service life is required

Compliant with EN 60947-1. Part of the Siemens SIRIUS 3RT1 range.

Also known as: Siemens 3RT1055-6AP36, SIRIUS 3RT1 power contactor 150 A.