Product Description
Key Features
- SIRIUS S2 soft starter: Product designation: Soft starter. Size of engine control device: S2.
- Rated current and power: Operational current rated value: 72 A at 40 °C. Standard circuit rating: 37 kW at 400 V and 45 kW at 500 V at 40 °C.
- Main electrical data: Operating voltage rated value: 400 … 600 V at standard circuit. Operating frequency rated value: 50 … 60 Hz at 500 V.
- Control supply: Control supply voltage type: AC/DC. Control supply voltage: 24 V at 50 Hz, 60 Hz, and DC, with -20 % to 20 % tolerance.
- Protection and functions: The device has an integrated bypass contact system, thyristors, intrinsic device protection, motor overload protection, external reset, and adjustable current limitation. Evaluation of thermistor motor protection, inside-delta circuit, and motor brake output are not included.
- Installation and connections: Fastening method: screw and snap-on mounting. Main, auxiliary, and control circuits use screw-type terminals. Front protection class: IP20 according to IEC 60529.
Technical Summary
| Product | Siemens SIRIUS 3RW4038-1BB05 soft starter |
|---|---|
| Rated operational current | 72 A at 40 °C |
| Standard circuit power at 400 V | 37 kW at 40 °C |
| Standard circuit power at 500 V | 45 kW at 40 °C |
| Operating voltage | 400 … 600 V |
| Operating frequency | 50 … 60 Hz |
| Control supply | 24 V AC/DC |
| Control supply tolerance | -20 % to 20 % |
| Connections | Screw-type terminals for main, auxiliary, and control circuits |
| Mounting | Screw and snap-on mounting |
| Front protection | IP20 according to IEC 60529 |
| Lifecycle | Active Product |
Frequently Asked Questions
What exact item should be confirmed for a legacy-part inquiry?
Confirm Siemens SIRIUS 3RW4038-1BB05, soft starter, size S2, 72 A at 40 °C, 45 kW at 500 V, and the required quantity and destination.
What control supply does the 3RW4038-1BB05 use?
The control supply is 24 V AC/DC at 50 Hz, 60 Hz, or DC, with -20 % to 20 % tolerance.
What connections and mounting does this soft starter have?
It has screw-type terminals for the main, auxiliary, and control circuits, with screw and snap-on mounting.
