Product Description
Key Features
- Rated current and motor capacity: At 40 °C, the rated current is 77 A in standard circuit and 133 A in inside-delta circuit. At 400 V, motor capacity is 37 kW in standard circuit and 75 kW in inside-delta circuit.
- Operating voltage: The rated operating voltage is 200 … 460 V in standard circuit and 200 … 460 V in inside-delta circuit.
- Control supply: The AC control supply is 230 V at 50 Hz and 230 V at 60 Hz.
- Integrated functions: The soft starter has an integrated bypass contact system, thyristors, intrinsic device protection, motor overload protection, thermistor motor protection evaluation, external reset, adjustable current limitation, and a motor brake output.
- Terminals and mounting: The main current circuit uses box terminals, while auxiliary and control circuits use spring-loaded terminals. Mounting is by screw fixing.
- Product lifecycle: Product lifecycle: start of final year of support. The collected description identifies the product as phased out.
Technical Summary
| Product designation | Soft starter |
|---|---|
| Rated current at 40 °C, standard circuit | 77 A |
| Rated current at 40 °C, inside-delta circuit | 133 A |
| Motor capacity at 400 V, standard circuit | 37 kW |
| Motor capacity at 400 V, inside-delta circuit | 75 kW |
| Rated operating voltage | 200 … 460 V |
| Control supply | 230 V AC at 50 Hz and 60 Hz |
| Mounting | Screw fixing; vertical mounting surface +/-90° rotatable and +/- 22.5° tiltable to the front and back |
| Front protection | IP20 according to IEC 60529 |
| Product lifecycle | Start of final year of support |
Frequently Asked Questions
What exact product should be confirmed for a legacy-part request?
Confirm Siemens SIRIUS 3RW4426-3BC44.
What are the rated current values for this soft starter?
At 40 °C, the rated current is 77 A in standard circuit and 133 A in inside-delta circuit.
What mounting and spacing details should be checked?
Mounting is by screw fixing. Required side-by-side spacing is 100 mm upwards, 5 mm at the side, and 75 mm downwards.
Which connection types are supplied?
The main current circuit uses box terminals; auxiliary and control circuits use spring-loaded terminals.
What lifecycle information should be confirmed?
The product lifecycle is start of final year of support, and the collected description identifies the product as phased out.
