The Siemens 3RW4027-1BB14 is described by Siemens as: SIRIUS soft starter S0 32 A, 15 kW/400 V, 40 °C 200-480 V AC, 110-230 V AC/DC Screw terminals.
SIRIUS 3RW soft starters ramp the motor voltage up and down so that pumps, fans, compressors and conveyors start without the current peak and mechanical shock of a direct-on-line start.
See our Siemens range.
Technical data
| Siemens order number | 3RW4027-1BB14 |
|---|---|
| Ambient temperature (operation) | -25 … +60 °C |
| Dimensions (W x H x D) | 45 x 125 x 155 mm |
| Condition | New, original Siemens |
Features at a glance
- SIRIUS soft starter S0 32 A
- 15 kW/400 V
- 40 °C 200-480 V AC
- 110-230 V AC/DC Screw terminals
Typical applications
- Pumps and fans
- Compressors
- Conveyor belts
- Replacing a star-delta starter
- Replacing a failed soft starter
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 supply voltage and wiring of the old unit before installing the new one.
- Check the mounting (DIN rail or screw fixing) and the terminal type (screw or spring-loaded) of the old unit.
- Compare the full order number 3RW4027-1BB14 with the label on the old unit, including the last digits (they identify the version).
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 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 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.
How fast can you deliver, and is there a warranty?
Air shipping usually takes 5 to 7 days once the part is ready, to almost any country. Each part is new and original with a 1-year warranty. Message us on WhatsApp with the order number for a quotation.
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.
Every part RendatSP supplies is new and original, carries a 1-year warranty and ships worldwide by air in 5 to 7 days once ready (shipping, payment and warranty). Send us the order number and quantity on WhatsApp or through the inquiry form and we will quote the same working day. Agents in Saudi Arabia, Iraq, the UAE, Egypt, Oman, Libya, Morocco, Mauritania, Yemen, Algeria and Jordan.
