3RW4424-1BC34

This model has a rated current of 42A with standard wiring and 73A with delta wiring. It can drive a 25hp motor at 460V. It features screw-type terminals and IP20 front panel protection and belongs to the Siemens SIRIUS 3RW44 series of standard 200 to 460V models.

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Siemens 3RW4424-1BC34 SIRIUS soft starter product image

Product Positioning

The 3RW4424-1BC34 is a soft starter model in the SIRIUS 3RW44 series that corresponds to a standard voltage range of 200 to 460V. When paired with a 115V AC control power supply, it is suitable for starting and stopping control of three-phase asynchronous motors in general factories.

Core Product Advantages and Features

200 to 460V standard voltage range

It covers common factory power distribution voltages and is suitable for most standard three-phase induction motor applications.

Built-in bypass connection

After the motor starts, it automatically switches to bypass conduction to reduce thyristor heating and save energy.

Finger-touch protective shell

The front panel has an IP20 finger-touch protection rating, improving on-site operation safety.

Adjustable current limiting and ramp time

The starting current limit and acceleration/deceleration time can be adjusted according to the characteristics of the motor on site to reduce starting shock.

project	Specification
model	3RW4424-1BC34
Product Category	SIRIUS 3RW44 Miniature Three-Phase Soft Starter
Rated current (standard wiring, 50°C)	42 A
Rated current (delta connection, 50°C)	73 A
Rated power (460V, standard wiring)	25 hp
Rated power (460V, delta connection)	50 hp
Rated voltage range	200~460 V AC (-15%/+10%)
Control voltage	AC 115 V (50/60 Hz)
Enclosure protection rating	IP20 front finger touch protection
Main circuit terminals	Crimp terminal (box terminal)
Control circuit wiring terminals	Screw terminals
External dimensions (width x height x depth)	170 x 192 x 270 mm
Motor overload protection	Built-in motor overload protection function

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3RW4424-1BC35

Standard wiring 42A, delta wiring 73A, using 115V AC control voltage, compatible with a wide voltage range of 400 to 600V and US standard 575V motor power rating, suitable for the smooth starting requirements of three-phase motors in production lines that meet both North American and European standards.

3RW4423-1BC44

Standard wiring provides 36A, 18.5kW; delta wiring provides up to 62A, 30kW. It features screw-type terminals and IP20 front panel protection, weighs approximately 7.2 kg, and is a commonly used mid-capacity model in the Siemens SIRIUS 3RW44 series.

3RW4423-1BC36

This model is compatible with the 400 to 690V European standard extended voltage range, uses a 115V AC control voltage and screw terminals, and belongs to the Siemens SIRIUS 3RW44 series suitable for higher power supply voltage applications.