3RW5055-6TB14

The 3RW5055-6TB14 is a Siemens SIRIUS 3RW50 series soft starter with a rated current of 143A. It is suitable for 200-480V three-phase power supplies, features built-in thermistor input protection and screw terminals, and is compact at only 3.2 kg, making it ideal for smooth start-stop of medium-sized motors.

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Siemens SIRIUS 3RW5055-6TB14 Soft Starter 143A

Product Positioning

The 3RW5055-6TB14 is a medium-sized soft starter from the Siemens SIRIUS 3RW50 series, with a rated current of 143A, suitable for smooth start and soft stop control of 200-480V three-phase motors.

Core Product Advantages and Features

Lightweight

The outer casing measures only 198×120×249mm and weighs approximately 3.2 kg, saving space in the control box.

Thermistor protection

Built-in thermistor input allows for real-time monitoring of motor winding temperature, preventing overheating damage.

Dual function of soft start and soft stop

The start and stop ramp times can be adjusted according to load characteristics to reduce mechanical shock.

Flexible installation angle

The main body can rotate ±90 degrees or tilt ±22.5 degrees, making it convenient for installation in narrow spaces inside the distribution box.

project	Specification
series	SIRIUS 3RW50
Rated current	143 A (40°C)
Applicable power supply voltage	3-phase 200-480V AC
Rated power	90 kW (400V)/37 kW (230V)
Control power supply voltage	110-250V AC, 50/60Hz
Input type	Thermistor input, plus one set of digital inputs
Terminal type	Main circuit bus connection, control circuit screw terminals
Protection level	IP00 (without cap) / IP20 (with cap)
Casing size	198 x 120 x 249 mm
net weight	Approximately 3.2 kg
Installation method	Secured by screws, it can rotate ±90° or tilt ±22.5°.
Communication Interface	Optional PROFINET/PROFIBUS/Modbus/EtherNet-IP modules
Function	Soft start, soft stop
Application scenarios	Smooth start and stop of medium-sized three-phase asynchronous motors

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3RW5055-6AB14

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3RW5055-6AB04

The 3RW5055-6AB04 is a Siemens SIRIUS 3RW50 series soft starter with a rated current of 143A. It is suitable for 200-480V three-phase power supplies, uses a 24V AC/DC control voltage design, and features analog output functionality for easy integration with PLC low-voltage control circuits.