Product Overview
Technical Summary
| Product designation | Soft starter |
|---|---|
| Rated operational current at 40 °C | 250 A |
| Inside-delta rated operational current at 40 °C | 433 A |
| Operating voltage | 200 … 460 V AC |
| Control supply | 230 V AC at 50 Hz or 60 Hz |
| Rated motor power at 400 V, standard circuit, 40 °C | 132 kW |
| Rated motor power at 400 V, inside-delta circuit, 40 °C | 250 kW |
| Main current connection | Busbar connection |
| Auxiliary and control connection | Screw-type terminals |
| Protection class on front | IP00; IP20 with box terminal/cover |
| Lifecycle | Phased-out product; start of final year of support |
Key Features
250 A rated value at 40 °C; 215 A at 50 °C and 185 A at 60 °C.
433 A rated value at 40 °C, 372 A at 50 °C, and 320 A at 60 °C.
Has intrinsic device protection, motor overload protection, evaluation of thermistor motor protection, external reset, and adjustable current limitation.
Operating voltage: 200 … 460 V AC for standard and inside-delta circuits. Control supply: 230 V AC at 50 Hz or 60 Hz.
Main current circuit uses busbar connection; auxiliary and control circuits use screw-type terminals. Mounting is by screw fixing.
Phased-out product. Start of final year of support; preferred successor type is 3RW5544-6HA14.
Frequently Asked Questions
What exact product is Siemens 3RW4444-6BC44?
It is a Siemens SIRIUS soft starter with integrated bypass contact system, thyristors, and motor protection functions.
What operating current does 3RW4444-6BC44 provide?
The rated operational current is 250 A at 40 °C. For inside-delta operation, the rated value is 433 A at 40 °C.
What voltage and connections does it use?
Operating voltage is 200 … 460 V AC for standard and inside-delta circuits. The control supply is 230 V AC 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 this line item in a quotation request?
Provide the requested quantity, destination, schedule context, and any additional BOM lines. The product is phased out, with 3RW5544-6HA14 as the preferred successor type.
