Product Overview
Technical Summary
| Product type | Soft starter |
|---|---|
| Rated current at 40 °C, standard circuit | 57 A |
| Rated current at 40 °C, inside-delta circuit | 99 A |
| Motor rating at 400 V, standard circuit | 30 kW |
| Motor rating at 400 V, inside-delta circuit | 55 kW |
| Rated operating voltage | 200 … 460 V AC |
| Control supply | 230 V AC at 50 Hz and 60 Hz |
| Main and auxiliary connections | Box terminals for main current circuit; spring-loaded terminals for auxiliary and control circuits |
| Front protection | IP20 |
| Lifecycle | Start of final year of support; preferred successor type 3RW5525-3HA14 |
Key Features
At 40 °C, the rated current is 57 A in standard circuit and 99 A in inside-delta circuit. At 400 V, the motor rating is 30 kW in standard circuit and 55 kW in inside-delta circuit.
Has intrinsic device protection, motor overload protection, evaluation of thermistor motor protection, external reset, and adjustable current limitation.
Standard and inside-delta circuits support 200 … 460 V rated operating voltage with -15 % relative negative tolerance and 10 % relative positive tolerance. Control supply is AC, 230 V at 50 Hz and 60 Hz.
Uses box terminals for the main current circuit and spring-loaded terminals for auxiliary and control circuits. Mounts with screw fixing and has a width of 170 mm, height of 192 mm, and depth of 270 mm.
Front protection class is IP20. Mounting requires a vertical mounting surface; the device is +/-90° rotatable and +/- 22.5° tiltable to the front and back.
Product lifecycle: start of final year of support. Preferred successor type: 3RW5525-3HA14.
Frequently Asked Questions
What exact component is Siemens 3RW4425-3BC44?
It is a SIRIUS soft starter with an integrated bypass contact system, motor overload protection, and adjustable current limitation.
What are the 400 V ratings for this configuration?
At 40 °C, the rated current is 57 A and the motor rating is 30 kW in standard circuit. In inside-delta circuit, the rated current is 99 A and the motor rating is 55 kW.
What connections and mounting details should be retained in the BOM?
The main current circuit uses box terminals; auxiliary and control circuits use spring-loaded terminals. Mounting is by screw fixing on a vertical mounting surface, with the stated rotation and tilt limits.
How should this line item be submitted for a project quotation?
Include the exact model, requested quantity, destination, schedule context, and any additional BOM lines in the quotation request.
