Product Overview
Technical Summary
| Product designation | SIRIUS soft starter |
|---|---|
| Rated operational current at 400 V and 40 °C, standard circuit | 250 A |
| Rated motor power at 400 V and 40 °C, standard circuit | 132 kW |
| Rated operational current at 400 V and 40 °C, inside-delta circuit | 433 A |
| Rated motor power at 400 V and 40 °C, inside-delta circuit | 250 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 |
| Mounting | Screw fixing |
| Product lifecycle | Start of final year of support |
Key Features
- Product designation: SIRIUS soft starter with integrated bypass contact system and thyristors.
- Standard-circuit rating: At 400 V and 40 °C, rated operational current is 250 A and rated motor power is 132 kW.
- Inside-delta rating: At 400 V and 40 °C in inside-delta circuit, rated operational current is 433 A and rated motor power is 250 kW.
- Control supply: AC control supply with 230 V rated value at 50 Hz and 60 Hz.
- Connections and mounting: Busbar connection for the main current circuit, screw-type terminals for auxiliary and control circuits, and screw fixing.
- Product status: Start of final year of support; the collected data identifies SIRIUS 3RW5 as the successor family and 3RW5544-6HA14 as the preferred successor type.
Frequently Asked Questions
What does Siemens 3RW4444-6BC44 identify?
It identifies a SIRIUS soft starter.
Which specifications distinguish this 3RW4444-6BC44 variant?
At 400 V and 40 °C, it has a 250 A and 132 kW rating in standard circuit, and a 433 A and 250 kW rating in inside-delta circuit.
What connections should be checked for this exact code?
The main current circuit uses a busbar connection; auxiliary and control circuits use screw-type terminals.
What details are needed to request a quotation?
Provide the exact code, required quantity, and destination.
