Product Overview
Technical Summary
| Product type | SIRIUS soft starter |
|---|---|
| Rated current, standard circuit at 40 °C | 93 A |
| Rated current, inside-delta circuit at 40 °C | 161 A |
| Motor power at 400 V, standard circuit at 40 °C | 45 kW |
| Motor power at 400 V, inside-delta circuit at 40 °C | 90 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 |
| Front protection | IP20 |
| Lifecycle | Start of final year of support |
Key Features
93 A at 40 °C in the standard circuit; 161 A at 40 °C for 3-phase motors in the inside-delta circuit.
45 kW at 40 °C in the standard circuit and 90 kW at 40 °C in the inside-delta circuit.
Has an integrated bypass contact system, intrinsic device protection, motor overload protection, evaluation of thermistor motor protection, external reset, and adjustable current limitation.
Operating voltage: 200 … 460 V AC in the standard and inside-delta circuits. Control supply: 230 V AC at 50 Hz or 60 Hz.
Main current circuit: box terminals. Auxiliary and control circuit: spring-loaded terminals. Screw fixing; dimensions are 170 mm wide, 192 mm high, and 270 mm deep.
Start of final year of support. Preferred successor type: 3RW5527-3HA14.
Frequently Asked Questions
What is the exact product line item?
It is Siemens SIRIUS 3RW4427-3BC44, a soft starter.
What current does the 3RW4427-3BC44 support?
It has 93 A at 40 °C in the standard circuit and 161 A at 40 °C for 3-phase motors in the inside-delta circuit.
What supply connections does it use?
The operating voltage is 200 … 460 V AC. The control supply is 230 V AC at 50 Hz or 60 Hz; the main current circuit uses box terminals and the auxiliary and control circuit uses spring-loaded terminals.
What should be included with a project quotation request?
Include the exact line item, requested quantity, destination, schedule, and any additional BOM lines.
