Product Overview
Technical Summary
| Product designation | SIRIUS soft starter |
|---|---|
| Rated operational current at 40 °C, standard circuit | 36 A |
| Rated operational current at 40 °C, inside-delta circuit | 62 A |
| Rated motor power at 400 V and 40 °C, standard circuit | 18.5 kW |
| Rated motor power at 400 V and 40 °C, inside-delta circuit | 30 kW |
| Operating voltage | 200 … 460 V |
| Control supply | 230 V AC at 50 Hz and 60 Hz |
| Main current connection | Box terminal |
| Auxiliary and control connection | Spring-loaded terminals |
| Mounting | Screw fixing |
| Front protection class | IP20 |
Key Features
- Product designation: SIRIUS soft starter with integrated bypass contact system and thyristors.
- Standard-circuit rating: Rated operational current: 36 A at 40 °C. At 400 V and 40 °C, rated motor power is 18.5 kW in the standard circuit.
- Inside-delta rating: Rated operational current for 3-phase motors: 62 A at 40 °C in the inside-delta circuit. At 400 V and 40 °C, rated motor power is 30 kW in the inside-delta circuit.
- Control supply: AC control supply, 230 V rated value at 50 Hz and 60 Hz, with -15 % to 10 % tolerance.
- Connections and mounting: Main current circuit: box terminal. Auxiliary and control circuit: spring-loaded terminals. Fastening method: screw fixing.
- Product lifecycle: Start of final year of support. Preferred successor type: 3RW5517-3HA14.
Frequently Asked Questions
What does Siemens 3RW4423-3BC44 identify?
It identifies a SIRIUS soft starter with an integrated bypass contact system, thyristors, intrinsic device protection, motor overload protection, and external reset.
Which ratings distinguish the 3RW4423-3BC44 variant?
At 40 °C, the rated operational current is 36 A in the standard circuit and 62 A in the inside-delta circuit. At 400 V, rated motor power is 18.5 kW in the standard circuit and 30 kW in the inside-delta circuit.
What connection details should be checked for this code?
Check the box terminal for the main current circuit, spring-loaded terminals for the auxiliary and control circuit, and the 3 main-current-circuit poles.
What should be supplied for a quotation?
Provide the complete code 3RW4423-3BC44, the required quantity, and the destination.
