Product Overview
Technical Summary
| Product designation | Soft starter |
|---|---|
| Rated operational current at 40 °C | 780 A |
| Inside-delta operational current at 40 °C | 1 351 A |
| Motor performance at 400 V, standard circuit, 40 °C | 450 kW |
| Motor performance at 400 V, inside-delta circuit, 40 °C | 800 kW |
| Operating voltage | 200 … 460 V |
| Operating frequency | 50 … 60 Hz |
| Control supply | 230 V AC at 50 Hz or 60 Hz |
| Main current connection | Busbar connection |
| Auxiliary and control connection | Screw-type terminals |
| Front protection class | IP00 |
Key Features
Has integrated bypass contact system, thyristors, intrinsic device protection, motor overload protection, thermistor motor protection evaluation, external reset, adjustable current limitation, and motor brake output.
At 40 °C, rated operational current is 780 A in standard circuit and 1 351 A for 3-phase motors in inside-delta circuit.
At 40 °C, rated motor performance is 450 kW in standard circuit and 800 kW in inside-delta circuit.
Rated operating voltage is 200 … 460 V in both standard and inside-delta circuits; rated operating frequency is 50 … 60 Hz.
Control supply is AC, 230 V at 50 Hz or 60 Hz. The main current circuit uses busbar connection; auxiliary and control circuits use screw-type terminals.
Dimensions are 510 mm wide, 640 mm high, and 290 mm deep; fastening is by screw fixing. The product is at the start of its final year of support, and its preferred successor is 3RW5554-6HA14.
Frequently Asked Questions
What exact product is Siemens SIRIUS 3RW4456-6BC44?
It is a SIRIUS soft starter with integrated bypass contact system, thyristors, motor overload protection, external reset, and adjustable current limitation.
What ratings apply at 400 V and 40 °C?
The rated motor performance is 450 kW in standard circuit and 800 kW in inside-delta circuit. Rated operational current is 780 A in standard circuit and 1 351 A in inside-delta circuit.
What control supply and connections does the configuration have?
It has a 230 V AC control supply at 50 Hz or 60 Hz. The main current circuit uses busbar connection, while auxiliary and control circuits use screw-type terminals.
What should be included with a quotation request for this line item?
Include the requested quantity, destination, schedule context, and any additional BOM lines for the project quotation.
