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.

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Siemens 3RW4423-1BC44 SIRIUS soft starter product image

Product Positioning

The 3RW4423-1BC44 is a mid-capacity soft starter model in the SIRIUS 3RW44 series. It uses a 230V AC control voltage and thyristor phase control, making it suitable for smooth starting and stopping of 400V three-phase motors.

Core Product Advantages and Features

18.5kW standard wiring capacity

With standard wiring at 400V, it can drive an 18.5kW three-phase motor, suitable for medium-sized equipment applications.

Delta connection upgraded to 30kW

By adopting the Inside-Delta wiring method, the driving power can be increased to 30kW, saving power distribution space.

Built-in bypass connection

After startup, the bypass is automatically switched on to reduce heat generation and energy consumption during operation.

Finger-touch protective shell design

The front panel has an IP20 protection rating, balancing operational safety and heat dissipation requirements.

project	Specification
model	3RW4423-1BC44
Product Category	SIRIUS 3RW44 Miniature Three-Phase Soft Starter
Rated current (standard wiring, 40°C)	36 A
Rated current (delta connection, 40°C)	62 A
Rated power (400V, standard wiring)	18.5 kW
Rated power (400V, delta connection)	30 kW
Rated power (230V, standard wiring)	7.5 kW
Rated power (230V, delta connection)	18.5 kW
Rated voltage range	200~460 V AC (-15%/+10%)
Control voltage	AC 230 V (50/60 Hz)
Enclosure protection rating	IP20 front finger touch protection
External dimensions (width x height x depth)	170 x 192 x 270 mm
net weight	Approximately 7.21 kg
Product Status	The original manufacturer has discontinued production; the recommended alternative is model 3RW5517-1HA14.

Recommend

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.

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.

3RW4423-1BC35

This model supports a wide voltage range of 400 to 600V, uses a 115V AC control voltage, and can power a 25hp motor at 575V (US standard). It is suitable for the starting needs of three-phase motors in mixed North American and European power supply environments.