Siemens Sirius Soft starter, screw, 200 - 480VAC, 24VADC, 45A Part number 3RW4036-1BB04

Product Overview

The Siemens 3RW4036-1BB04 is a SIRIUS 3RW40 S2 soft starter designed for three-phase motors. It has a rated operational current of 45 A at 40 °C and supports motor power up to 22 kW at 400 V. It features a 200–480 V AC three-phase supply range, screw-terminal connections and an integrated bypass contact system. The device is optimized for smooth starts, current limiting and protection in industrial motor feeders.

Key Features

• Soft starter for standard applications with integrated bypass contact system
• Rated current: 45 A at 40 °C (derated to 42 A at 50 °C, 39 A at 60 °C)
• Motor power rating: up to 22 kW at 400 V AC
• Supply voltage range: 200–480 V AC, three-phase
• Screw-terminal main and auxiliary connections for secure wiring
• Designed for motor feeder applications requiring reduced starting current, smoother acceleration and less mechanical stress

Technical Specifications

• Article Number: 3RW4036-1BB04
• Series: SIRIUS 3RW40 – Soft Starter S2 class
• Rated Operational Current (Ie): 45 A at 40 °C
• Motor Power Rating (AC-3, 400 V): ~22 kW
• Supply Voltage: 200…480 V AC, three-phase
• Control Supply Voltage: 24 V AC/DC
• Insulation Voltage (Ui): 600 V
• Blocking Voltage of Thyristors (max): 1 600 V
• Number of Poles (Main Circuit): 3 (three-phase)
• Connection Type (main/auxiliary): Screw-type terminals
• Ambient Temperature Derating: 42 A at 50 °C; 39 A at 60 °C
• Mounting Position/Mounting Clearance: Refer to manufacturer’s installation instructions

Compliance & Certifications

• Complies with international standards for motor feeder devices and soft starters
• Designed for industrial automation, heavy-duty control panels and motor protection installations

Applications

The 3RW4036-1BB04 is ideal for start-up of three-phase induction motors in industrial automation contexts where smoother acceleration, lower in-rush current and reduced mechanical stress are required. Typical uses include conveyor drives, pumps, compressors, mixers, machine tools and other motor-driven systems where frequent starting or heavy loads demand a reliable soft starting solution.