Product Overview
Technical Summary
| Product designation | Soft starter |
|---|---|
| Rated current at 40 °C | 36 A |
| Motor power at 400 V, standard circuit | 18.5 kW |
| Motor power at 400 V, inside-delta circuit | 30 kW |
| Operating voltage | 200 … 460 V AC |
| Control supply | 230 V AC at 50 Hz or 60 Hz |
| Main current connection | Box terminal |
| Auxiliary and control connection | Spring-loaded terminals |
| Mounting | Screw fixing |
| Front protection | IP20 |
| Lifecycle | Start of final year of support |
Key Features
At 40 °C, rated current is 36 A in standard circuit; at 400 V, rated motor power is 18.5 kW in standard circuit and 30 kW in inside-delta circuit.
Operating voltage is 200 … 460 V AC in standard and inside-delta circuits. Control supply is 230 V AC at 50 Hz or 60 Hz; auxiliary and control circuits use spring-loaded terminals.
The device has intrinsic device protection, motor overload protection, evaluation of thermistor motor protection, external reset, and adjustable current limitation.
It has an integrated bypass contact system, thyristors, inside-delta circuit capability, and a motor brake output.
Screw fixing; dimensions are 170 mm wide, 192 mm high, and 270 mm deep. Required side-by-side spacing is 100 mm upwards, 5 mm at the side, and 75 mm downwards.
Product lifecycle: start of final year of support. Preferred successor type: 3RW5517-3HA14.
Frequently Asked Questions
What is the exact Siemens line item?
It is Siemens SIRIUS 3RW4423-3BC44, a soft starter.
What rated current and motor power does it provide?
At 40 °C, rated current is 36 A. At 400 V, motor power is 18.5 kW in standard circuit and 30 kW in inside-delta circuit.
What supply and connections are specified?
Operating voltage is 200 … 460 V AC. The control supply is 230 V AC at 50 Hz or 60 Hz, with a box terminal for the main current circuit and spring-loaded terminals for auxiliary and control circuits.
How is the unit mounted and protected?
It uses screw fixing, measures 170 mm x 192 mm x 270 mm, and has IP20 protection on the front.
What should be included in a quotation request?
Request the exact line item with quantity, destination, schedule context, and any additional BOM lines.
