Siemens 3RT2035-1AP04 SIRIUS Power Contactor 41A 18.5kW 230V AC 3P

The Siemens 3RT2035-1AP04 (MLFB: 3RT2035-1AP04) is a SIRIUS 3RT2 series 3-pole power contactor rated at 41 A / 18.5 kW at 400 V AC-3, designed for switching AC motor loads. It features a 230 V AC / 50 Hz control coil and an integrated auxiliary contact arrangement of 2 NO + 2 NC, making it suitable for direct-on-line and reversing motor starters.

Technical specifications:

• MLFB: 3RT2035-1AP04
• Manufacturer: Siemens
• Product line: SIRIUS
• Product type: Power contactor
• Type designation: 3RT2
• Size: S2
• Number of poles (main circuit): 3
• Rated current AC-3 at 400 V: 41 A
• Rated current AC-3 at 690 V: 24 A
• Rated current AC-1 at 400 V / 40°C: 60 A
• Rated operating power AC-3 at 400 V: 18.5 kW
• Rated operating power AC-3 at 500 V: 22 kW
• Operating voltage (main circuit): up to 690 V AC
• Control supply voltage: 230 V AC, 50 Hz
• Operating range: 0.8 - 1.1 x rated coil voltage
• Auxiliary contacts: 2 NO + 2 NC, removable auxiliary switch
• Terminal type: Screw terminal
• Insulation voltage (main and auxiliary circuit): 690 V
• Surge voltage resistance: 6 kV
• Mechanical service life: 10,000,000 operating cycles
• Operating temperature: -25 ... +60°C
• Storage temperature: -55 ... +80°C
• Installation altitude: up to 2,000 m above sea level
• Net weight: 1.065 kg
• No-load switching frequency: 5,000 operations/h
• AC-3 operating frequency: up to 1,000 operations/h

Features and benefits:

• Removable auxiliary switch block allows flexible contact configuration without replacing the contactor body
• Size S2 frame handles motors up to 18.5 kW at 400 V within a compact DIN-rail footprint
• Wide operating temperature range of -25 ... +60°C suits demanding industrial environments
• Screw terminals with minimum 16 mm² cable cross-section support robust wiring for high-current applications
• 10 million mechanical operating cycles provide long service life with low maintenance requirements

Applications:

• Direct-on-line starting of three-phase motors up to 18.5 kW at 400 V
• Reversing starter configurations using the 2 NO + 2 NC auxiliary contact arrangement
• Star-delta motor starting circuits in industrial machinery
• Capacitor bank switching at AC-6a duty up to 690 V
• General load switching in control panels operating at up to 690 V AC

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

Also known as: Siemens 3RT2035-1AP04, SIRIUS 3RT2 contactor 41A, Siemens S2 power contactor 230V coil.