Key facts
- Brand
- Siemens
- Model
- 3RW40
- Industry
- Industrial
- Documents
- 2
- Languages
- ZH · EN
- Last added
- 2026-10-14
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Siemens 3RW40 Soft Starter User Manual
The document is a user guide for the Siemens SIRIUS 3RW40 soft starter, covering installation, operation modes, and troubleshooting. It includes specific factory settings such as an overload current limit of 5 times rated current (Ie) and acceleration time of 7 seconds.
Key operational details include the RESET/TEST mode which allows for manual reset or automatic restart upon failure, and a bypassed state option. The device features LED indicators for status monitoring: green for normal operation, yellow for warning, and red for fault or overload conditions. This manual is written in Chinese.
Siemens 3RW40 specifications
| Rated operational voltage (3RW40) | 200 … 400 V |
|---|---|
| Rated control supply voltage (3RW40) | 24 V to 230 V |
| Standby control supply current (3RW40) | < 150 mA |
| Rated operational current (3RW40) | A 3 AC‑15/AC‑14 at 230 V |
All Siemens 3RW40 documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in these manuals
What are the tightening torque specifications for model 3RW40 5 and 3RW40 7?
The specified tightening torque is M6 ... 10 Nm for 3RW40 5 and M8 ... 15 Nm for 3RW40 7.
What is the rated control supply voltage range for the 3RW40 soft starter?
The 3RW40 can be powered from 24 V up to 230 V.
What is the standby current of the 3RW40 control supply?
The standby current is less than 150 mA.