Product Overview
Technical Summary
| Product designation | Soft starter |
|---|---|
| Rated operational current at 40 °C, standard circuit | 551 A |
| Rated operational current at 40 °C, inside-delta circuit | 954 A |
| Rated motor power at 400 V, standard circuit | 315 kW |
| Rated motor power at 400 V, inside-delta circuit | 560 kW |
| Operating voltage, standard circuit | 200 … 460 V |
| Operating voltage, inside-delta circuit | 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 |
Key Features
Rated operational current is 551 A at 40 °C in the standard circuit and 954 A at 40 °C for 3-phase motors in the inside-delta circuit.
Rated motor power is 315 kW in the standard circuit and 560 kW in the inside-delta circuit at 400 V.
Operating voltage is 200 … 460 V in both circuits; the main current circuit uses busbar connection and auxiliary and control circuits use screw-type terminals.
The soft starter has an integrated bypass contact system, thyristors, intrinsic device protection, motor overload protection, external reset, adjustable current limitation, and motor brake output.
Dimensions are 510 mm wide, 640 mm high, and 290 mm deep; fastening is by screw fixing, with IP00 protection on the front.
This is a phased-out product at the start of its final year of support. The preferred successor type is 3RW5548-6HA14.
Frequently Asked Questions
What is the exact product line item?
It is the Siemens 3RW4453-6BC44 SIRIUS soft starter.
What current is available at 40 °C?
The rated operational current is 551 A in the standard circuit and 954 A for 3-phase motors in the inside-delta circuit.
What connections does the soft starter have?
The main current circuit has a busbar connection, while auxiliary and control circuits use screw-type terminals.
How is the unit mounted?
It uses screw fixing. Required side-by-side spacing is 100 mm upwards, 5 mm at the side, and 75 mm downwards.
What should be provided for a project quotation?
Provide the requested quantity, destination, schedule context, and any additional BOM line items.
