Product Overview
Technical Summary
| Product designation | Soft starter |
|---|---|
| Rated operational current at 40 °C | 970 A |
| Inside-delta operational current at 40 °C | 1 680 A |
| Operating voltage | 200 … 460 V |
| Control supply | 230 V AC at 50 Hz or 60 Hz |
| Main circuit connection | Busbar connection |
| Auxiliary and control connection | Screw-type terminals |
| Mounting | Screw fixing; vertical mounting surface +/-90° rotatable and +/- 22.5° tiltable to the front and back |
| Front protection class | IP00 according to IEC 60529 |
| Lifecycle | Start of final year of support |
Key Features
970 A at 40 °C; 850 A at 50 °C and 760 A at 60 °C.
1 680 A at 40 °C, 1 472 A at 50 °C, and 1 316 A at 60 °C for 3-phase motors in an inside-delta circuit.
Has intrinsic device protection, motor overload protection, evaluation of thermistor motor protection, external reset, and adjustable current limitation.
Main circuit operating voltage is 200 … 460 V for standard and inside-delta circuits; control supply is 230 V AC at 50 Hz or 60 Hz.
Uses busbar connection for the main current circuit and screw-type terminals for auxiliary and control circuits; fastening method is screw fixing.
Start of final year of support. The product is phased out; successor is SIRIUS 3RW5, with preferred successor type 3RW5556-6HA14.
Frequently Asked Questions
What is the exact product designation of Siemens 3RW4458-6BC44?
It is a SIRIUS Soft starter.
What rated operational current does the 3RW4458-6BC44 have?
It has 970 A at 40 °C, 850 A at 50 °C, and 760 A at 60 °C.
What connections does this soft starter use?
It has a busbar connection for the main current circuit and screw-type terminals for auxiliary and control circuits.
Is the Siemens 3RW4458-6BC44 still in the current product range?
It is a phased-out product at the start of its final year of support. The successor is SIRIUS 3RW5, with preferred successor type 3RW5556-6HA14.
