Siemens 3RT1056-6AB36 SIRIUS S6 Power Contactor 3P 185A 90kW 23-26V AC/DC

The Siemens 3RT1056-6AB36 is a 3-pole SIRIUS power contactor in frame size S6, rated 185 A and 90 kW at 400 V (AC-3) for switching three-phase motors and other inductive loads. It uses a wide-range 23-26 V AC/DC electronic coil with integrated varistor surge suppression and provides 2 NO + 2 NC built-in auxiliary contacts, making it suited to motor control centres, pump and fan starters, and industrial distribution panels.

Technical specifications:

• Part number: 3RT1056-6AB36
• Manufacturer: Siemens
• Series: SIRIUS 3RT1, frame size S6
• Number of poles: 3
• Rated operational current AC-3: 185 A (at 400 V and 500 V); 170 A at 690 V
• Rated power AC-3 at 400 V: 90 kW
• Rated operational current AC-1: 215 A at 40 °C, 185 A at 60 °C
• Rated operational current AC-4 at 400 V: 160 A
• Maximum operational voltage: 1000 V
• Control supply voltage (coil): 23-26 V AC/DC (UC), terminals A1-A2
• Surge suppression: integrated varistor
• Integrated auxiliary contacts: 2 NO + 2 NC (instantaneous)
• Main circuit connection: busbar; auxiliary circuit: screw terminal
• Drive: conventional screw terminal
• Mirror contact per IEC 60947-4-1
• Finger-safe per IEC 60529
• Degree of protection: IP00 (IP20 on front with cover or box terminal)
• Mechanical service life: 10,000,000 switching cycles
• Ambient temperature in operation: -25 to +60 °C
• Dimensions: width 120 mm, depth 170 mm
• EAN: 4011209782587

Features and benefits:

• Wide-range 23-26 V AC/DC coil accepts both AC and DC control without a separate rectifier and reduces variant count.
• Integrated varistor suppresses switching surges that could disturb nearby electronics.
• 2 NO + 2 NC auxiliary contacts built in for control interlocking and status signalling without add-on blocks.
• Mirror contact per IEC 60947-4-1 gives safe feedback of the main-contact position.
• Finger-safe terminals per IEC 60529 for safer maintenance.
• High mechanical endurance of 10 million operations for long service life in frequently switched duty.

Applications:

• Switching and control of three-phase motors up to 90 kW at 400 V
• Motor control centres and starter panels
• Pump, fan, and compressor control
• Resistive and mixed loads up to 215 A (AC-1)
• Industrial distribution and automation cabinets

Complies with IEC 60947-4-1 and IEC 60947-1.

Also known as: Siemens SIRIUS S6 contactor, 3RT1056-6AB36 90kW contactor, 3RT10566AB36, 185A 3-pole contactor 23-26V UC, Siemens motor contactor S6.