3RW4027-1TB04

The SIRIUS 3RW4027-1TB04 soft starter has a rated current of 32A, can control a 15kW/400V three-phase motor, and has a control voltage of 24V AC/DC. It features a built-in thermistor input evaluation function and provides adjustable start/stop time from 0 to 20 seconds, making it suitable for smooth starting of loads such as pumps and fans.

Share To

Product image of Siemens SIRIUS 3RW4027-1TB04 soft starter

Product Positioning

The 3RW4027-1TB04 is a simplified soft starter in the Siemens SIRIUS 3RW40 series with an S0 frame. It has a rated current of 32A and can be used with a 15kW/400V motor. It also has a built-in thermistor input, which can monitor the motor winding temperature in real time to enhance protection capabilities.

Core Product Advantages and Features

Thermistor input

With a built-in thermistor (PTC) input terminal, it can directly receive motor winding temperature signals, enhancing overheat protection.

Start-stop time adjustable

Both start and stop times can be adjusted within the range of 0-20 seconds, allowing for smooth acceleration and deceleration based on load characteristics.

Electronic overload protection

Built-in electronic overload relay eliminates the need for external heating automatic overload components and simplifies control box wiring.

Rail mounting

It supports quick-release mounting on standard DIN rails and can also be fixed with screws, saving space in the control box.

project	Specification
model	3RW4027-1TB04
Product Series	SIRIUS 3RW40
Frame size	S0
Rated current	32 A
Corresponding motor power	15 kW / 400 V
Rated operating voltage range	200-480 V AC
Control voltage	24 V AC/DC
Motor protection type	Thermistor (PTC) input
Terminal type	Screw terminals
Start-stop time setting	Adjustable from 0 to 20 seconds
Ambient temperature	40 °C (rated); -25 ~ +60 °C Operating range
Protection level	IP20
Installation method	DIN rail/screw fixing
net weight	Approximately 0.71 kg

Recommend

3RW4028-1BB04

The Siemens SIRIUS 3RW4028-1BB04 soft starter has an S0 frame and a rated current of 38A. It is suitable for 200 to 480V AC three-phase motors, corresponding to 18.5kW/400V. It comes with a 24V AC/DC control voltage and screw terminals, which is a common standard control voltage model.

3RW4027-1BB14

The SIRIUS 3RW4027-1BB14 soft starter is designed with a 110-230V AC/DC control voltage, eliminating the need for an additional control transformer and allowing connection to a panel power supply. It has a rated current of 32/29A, can control 15kW/400V motors, and features automatic, manual, and remote reset modes. It also has IP20 protection.

3RW4027-1BB04

The SIRIUS 3RW4027-1BB04 soft starter is a standard model (without thermistor input), rated current 32A, capable of controlling a 15kW/400V three-phase motor, control voltage 24V AC/DC, and uses screw terminals and DIN rail mounting.