Siemens 3RW4038-1BB04 SIRIUS Soft Starter “ 72A, 200-480V, IP20

The Siemens 3RW4038-1BB04 is a high-performance **soft starter** from the **SIRIUS family**, designed for **efficient motor control and protection**. With a **rated current of up to 72A** and an **adjustable motor current of 35A**, this soft starter ensures **smooth acceleration and deceleration**, reducing mechanical stress and enhancing equipment longevity.

Key Product Details:

• Manufacturer: Siemens
• Type: Soft Starter
• MNR: 3RW4038-1BB04
• Family: SIRIUS

Technical Information:

• Operating Voltage: 200 “ 480 V
• Rated Current: 72 A at 40 °C, 62 A at 50 °C, 60 A at 60 °C
• Insulation Voltage: 600 V
• Adjustable Motor Current: 35 A
• Short Circuit Protection: 10 kA, 600 V
• Rated Impulse-Withstand Voltage (Uimp): 6 kV
• Control Supply Voltage (DC): 24 V
• Power: 37 kW at 400 V
• Operating Frequency: 50 / 60 Hz
• Protection Class: IP20
• Ambient Temperature Range: -25 / 60 °C
• Dimensions: 55 x 160 x 170 mm

Designed for **reliable motor starting and protection**, the Siemens 3RW4038-1BB04 soft starter ensures **optimized performance, reduced inrush currents, and improved motor efficiency** in **industrial automation, HVAC systems, and pump control applications**.