The Siemens 3RW3037-1BB04 is described by Siemens as: SIRIUS soft starter S2 63 A, 30 kW/400 V, 40 °C 200-480 V AC, 24 V AC/DC Screw terminals.
Typical failures are thyristor damage after a short circuit or overheating in a crowded panel; replacing the unit with the same order number keeps wiring and settings unchanged.
See our Siemens range.
Technical data
| Siemens order number | 3RW3037-1BB04 |
|---|---|
| Ambient temperature (operation) | -25 … +60 °C |
| Dimensions (W x H x D) | 55 x 160 x 170 mm |
| Condition | New, original Siemens |
Features at a glance
- SIRIUS soft starter S2 63 A
- 30 kW/400 V
- 40 °C 200-480 V AC
- 24 V AC/DC Screw terminals
Typical applications
- Replacing a failed soft starter
- Replacing a star-delta starter
- Pumps and fans
- Compressors
- Conveyor belts
Compatibility and replacement
Compare the rated current, motor power, control supply voltage and connection type (screw or spring-loaded) with the old soft starter; the Siemens data sheet above gives the exact values.
Replacement checklist
- Check the mounting (DIN rail or screw fixing) and the terminal type (screw or spring-loaded) of the old unit.
- Look for signs of overvoltage, water or heat damage in the cabinet so the new part does not fail for the same reason.
- Check the supply voltage and wiring of the old unit before installing the new one.
Frequently asked questions
Can it reduce the starting current?
Yes. Soft starters limit the inrush current by ramping the voltage; the achievable reduction depends on the load and the settings.
Does it need an overload relay?
That depends on the model: check the protective functions listed in the Siemens data sheet, and add a 3RU2 overload relay or 3RV2 breaker where motor protection is not integrated.
Can you help me identify the right replacement?
Yes. Send us a photo of the label of the old part, or its full order number, and we will confirm the exact match or the official successor before quoting.
Can I get a datasheet?
The official manufacturer datasheet is the source of the technical data above; we can send the PDF with the quotation on request.
Can I get a price and delivery time?
Prices are quoted on request. Send the order number, quantity and delivery country on WhatsApp and we will reply with price and delivery time; air shipping is usually 5 to 7 days once ready, with a 1-year warranty.
Ordering tips
Send us the full order number from the label of the old part, or a clear photo of the label, together with the quantity you need. We check the number against the current manufacturer data before we quote and tell you if there is a newer replacement.
RendatSP ships from Yiwu, China, to factories worldwide; air delivery usually takes 5 to 7 days once the part is ready. The part is new and original with a 1-year warranty (shipping, payment and warranty). For a quotation, message us on WhatsApp with the order number and quantity. We also have agents in Saudi Arabia, Iraq, the UAE, Egypt, Oman, Libya, Morocco, Mauritania, Yemen, Algeria and Jordan.
