3RW4427-1BC34

The SIRIUS 3RW44 series soft starter has a standard rated capacity of 93 amps and 45 kilowatts at 400 volts and 60 horsepower at 460 volts and 50°C. It uses 115 volt AC for control and has IP20 protection on the front panel, making it easy to integrate with existing 115 volt control panels.

Share To

Product photo of Siemens 3RW4427-1BC34 SIRIUS soft starter

Product Positioning

The 3RW4427-1BC34 is a soft starter from the Siemens SIRIUS 3RW44 series. It uses 115-volt AC for control, making it easy to connect directly to common low-voltage control panel power supplies in North America. It is suitable for starting and stopping medium-sized three-phase motors that require segmented heat dissipation designs.

Core Product Advantages and Features

115 Volt Control Compatibility

The control circuit voltage is 115 volts AC, and it can be connected to common North American control panels without the need for a transformer.

Multi-temperature segmented rated current

Rated currents of 93, 82, and 72 amps are provided for selection reference at 40, 50, and 60℃ environments, respectively.

North American horsepower correspondence is clear

At 460 volts and 50°C, the standard connection method corresponds to 60 horsepower, while the internal delta connection method corresponds to 100 horsepower.

Box-type terminals with screw control

The main circuit uses box-type terminals and control circuit screw terminals, which combine load-bearing capacity and wiring convenience.

project	Specification
model	3RW4427-1BC34
Product Type	SIRIUS 3RW44 Soft Starter
Standard circuit rated current (40/50/60℃)	93 / 82 / 72 A
Internal delta connection current (40/50/60℃)	161 / 142 / 125 A
400-volt standard circuit power	45 kW
400 volt internal delta connection power	90 kW
460V/50℃ Standard Horsepower	60 HP
460V/50℃ Internal Triangle Horsepower	100 HP
Main circuit rated voltage range	200～460 V AC
Control power supply voltage	115 V AC, 50/60 Hz
Terminal type	Box-type terminals (main circuit) / Screw terminals (control circuit)
Enclosure protection rating	Front panel IP20
External dimensions (width × height × depth)	170×192×270 mm

Recommend

3RW4427-1BC45

The SIRIUS 3RW44 high-voltage motor has a standard rated capacity of 93 amps and 55 kilowatts at 500 volts, and can reach 161 amps and 110 kilowatts with an internal delta connection. The main circuit covers 400 to 600 volts, and the control voltage is 230 volts, making it suitable for the start-stop control needs of high-voltage motors in North America.

3RW4427-1BC44

The SIRIUS 3RW44 series soft starter has a standard rated output of 93 amps and 45 kW at 400 volts, and an internal delta connection output of 161 amps and 90 kW. The main circuit voltage range is 200 to 460 volts, the control voltage is 230 volts, and the front panel protection rating is IP20.

3RW4426-1BC44

The SIRIUS 3RW44 series soft starters have a standard rated output of 77 amps and 37 kW at 400 volts, and an internal delta connection output of 133 amps and 75 kW. The main circuit voltage range is 200 to 460 volts, the control voltage is 230 volts, and the front panel protection rating is IP20.