Product Overview
Technical Summary
| Product designation | SIRIUS soft starter |
|---|---|
| Size | S0 |
| Rated operational current at 40 °C | 38 A |
| Motor power at 400 V | 18.5 kW |
| Operating voltage | 200 … 480 V AC |
| Control supply | 24 V AC/DC |
| Electrical connection | Screw-type terminals |
| Front protection | IP20 |
| Mounting | Screw and snap-on mounting |
| Operating ambient temperature | -25 … +60 °C |
| Product lifecycle | Active Product |
Key Features
- Product designation: SIRIUS soft starter, size S0, with 38 A rated current at 40 °C.
- Motor power: 18.5 kW at 400 V in the standard circuit at 40 °C rated value.
- Operating voltage: 200 … 480 V AC at the standard circuit rated value.
- Control supply: 24 V AC/DC control supply; the AC supply is rated at 50 Hz and 60 Hz.
- Connections: Screw-type terminals for the main current circuit and auxiliary and control circuits.
- Protection and functions: Integrated bypass contact system, thyristors, intrinsic device protection, motor overload protection, external reset, and adjustable current limitation.
Frequently Asked Questions
What identifies the Siemens 3RW4028-1BB04 variant?
It is a SIRIUS S0 soft starter with 38 A rated current at 40 °C, 18.5 kW at 400 V, 200 … 480 V AC operation, 24 V AC/DC control supply, and screw-type terminals.
Which specifications should be checked against the nameplate and complete code?
Check the complete 3RW4028-1BB04 order number together with the S0 size, 38 A rating at 40 °C, 200 … 480 V AC operating voltage, 24 V AC/DC control supply, and screw-type terminals.
What connection and mounting details are supplied?
The device has screw-type terminals for the main current, auxiliary, and control circuits, with screw and snap-on mounting.
What information is needed for a quotation request?
Provide the complete order number, requested quantity, and destination for quotation review.
