Product Overview
Technical Summary
| Product designation | Soft starter |
|---|---|
| Rated operational current at 40 °C | 432 A |
| Inside-delta operational current at 40 °C | 748 A |
| Motor power at 400 V, standard circuit | 250 kW |
| Motor power at 400 V, inside-delta circuit | 400 kW |
| Operating voltage | 200 … 460 V |
| Control supply | 230 V AC at 50 Hz and 60 Hz |
| Main current connection | Busbar connection |
| Auxiliary and control connection | Screw-type terminals |
| Front protection | IP00; IP20 with box terminal/cover |
| Product lifecycle | Start of final year of support; preferred successor type 3RW5547-6HA14 |
Key Features
432 A at 40 °C, 385 A at 50 °C, and 335 A at 60 °C in standard circuit.
748 A at 40 °C, 667 A at 50 °C, and 580 A at 60 °C for 3-phase motors in inside-delta circuit.
250 kW at 40 °C in standard circuit and 400 kW at 40 °C in inside-delta circuit.
Has intrinsic device protection, motor overload protection, thermistor motor protection evaluation, external reset, and adjustable current limitation.
Has busbar connection for the main current circuit, screw-type terminals for auxiliary and control circuits, screw fixing, and a vertical mounting surface with the stated rotation and tilt allowances.
Phased-out product; start of final year of support. Preferred successor type: 3RW5547-6HA14.
Frequently Asked Questions
What is the exact product type and model?
It is the Siemens SIRIUS 3RW4447-6BC44 soft starter.
What current is supported at 40 °C?
The rated operational current is 432 A in standard circuit and 748 A for 3-phase motors in inside-delta circuit at 40 °C.
What are the 400 V motor power ratings?
At 400 V and 40 °C, the rating is 250 kW in standard circuit and 400 kW in inside-delta circuit.
How is the unit connected and mounted?
The main current circuit uses a busbar connection. Auxiliary and control circuits use screw-type terminals, and mounting is by screw fixing on a vertical mounting surface.
How should this line item be included in a quotation?
Submit the requested quantity, destination, schedule context, and any additional BOM lines for project quotation review.
