3RW4422-1BC34

Standard wiring is 26A, delta wiring is 45A, which can drive a 15hp motor at 460V. It uses screw terminals and has an IP00 protection rating. It is the entry-level model with the lowest rated current in the Siemens SIRIUS 3RW44 series.

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Siemens 3RW4422-1BC34 SIRIUS soft starter product image

Product Positioning

The 3RW4422-1BC34 is the soft starter model with the smallest rated current in the SIRIUS 3RW44 series. It corresponds to a standard voltage range of 200 to 460V and is suitable for starting and stopping small three-phase motors when paired with a 115V AC control power supply.

Core Product Advantages and Features

200 to 460V standard voltage range

It covers common factory power distribution voltages and is suitable for most small 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.

115V control power supply design

The control circuit is powered by 115V AC, which facilitates integration with the existing power supply system of the US standard control panel.

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	3RW4422-1BC34
Product Category	SIRIUS 3RW44 Miniature Three-Phase Soft Starter
Rated current (standard wiring, 50°C)	26 A
Rated current (delta connection, 50°C)	45 A
Rated power (400V, standard wiring)	15 kW
Rated power (400V, delta connection)	22 kW
Rated power (230V, standard wiring)	5.5 kW
Rated power (230V, delta connection)	15 kW
Rated voltage range	200~460 V AC (-15%/+10%)
Control voltage	AC 115 V (50/60 Hz)
Enclosure protection rating	IP00
Control circuit wiring terminals	Screw terminals
External dimensions (width x height x depth)	170 x 192 x 270 mm
Product Status	The original manufacturer has discontinued production; the recommended alternative is model 3RW5516-1HA14.

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3RW4422-1BC35

This model is compatible with a wide voltage range of 400 to 600V, uses 115V AC control voltage, and its standard wiring can support a 20hp motor at 575V (US standard). It is one of the smallest capacity US standard voltage models in the Siemens SIRIUS 3RW44 series.

3RW4076-6BB45

The 3RW4076-6BB45 is the highest current rating in the SIRIUS 3RW40 series. With a rated current of 432A, it can handle a wide voltage range of 400 to 600V AC. The built-in bypass contact reduces heat generation during operation, making it more energy-efficient and stable for long-term operation.

3RW4076-6BB44

The 3RW4076-6BB44 has a rated current of 432A and is compatible with a voltage range of 200 to 460V AC. It comes with a 230V AC control power supply and screw terminals, features a smooth start-up process, and has a bypass operation mechanism to reduce heat loss.