Product Overview
Technical Summary
| Parameter | Value |
|---|---|
| Product type | SIRIUS soft starter |
| Rated current at 400 V and 40 °C, standard circuit | 36 A |
| Rated current at 400 V and 40 °C, inside-delta circuit | 62 A |
| Motor power at 400 V and 40 °C, standard circuit | 18.5 kW |
| Motor power at 400 V and 40 °C, inside-delta circuit | 30 kW |
| Operating voltage, standard circuit | 200 … 460 V AC |
| Operating voltage, inside-delta circuit | 200 … 460 V AC |
| Control supply voltage | 230 V AC at 50 Hz and 60 Hz |
| Main current circuit connection | Box terminal |
| Auxiliary and control circuit connection | Spring-loaded terminals |
| Product lifecycle | Start of final year of support |
Key Features
- Soft starter function: SIRIUS soft starter with integrated bypass contact system, thyristors, intrinsic device protection, motor overload protection, and adjustable current limitation.
- Rated current at 40 °C: 36 A in the standard circuit and 62 A for 3-phase motors in the inside-delta circuit.
- Motor power at 400 V and 40 °C: 18.5 kW in the standard circuit and 30 kW in the inside-delta circuit.
- Operating voltage: 200 … 460 V in both the standard circuit and inside-delta circuit, with -15 % relative negative tolerance and 10 % relative positive tolerance.
- Connections: Box terminal for the main current circuit and spring-loaded terminals for auxiliary and control circuits.
- Mounting and protection: Screw fixing, IP20 protection on the front according to IEC 60529, and vertical mounting surface with +/-90° rotation or +/- 22.5° front and rear tilt.
Frequently Asked Questions
1. What is the Siemens 3RW4423-3BC44?
It is a SIRIUS soft starter with an integrated bypass contact system, thyristors, motor overload protection, adjustable current limitation, and a motor brake output.
2. What current does the 3RW4423-3BC44 support?
At 40 °C, it has a rated current of 36 A in the standard circuit and 62 A for 3-phase motors in the inside-delta circuit.
3. What voltage and control supply does it use?
The operating voltage is 200 … 460 V AC in the standard and inside-delta circuits. The control supply is 230 V AC at 50 Hz and 60 Hz.
4. How is the 3RW4423-3BC44 connected and mounted?
It uses a box terminal for the main current circuit, spring-loaded terminals for auxiliary and control circuits, and screw fixing. The mounting position requires a vertical mounting surface.
