Product Overview
Technical Summary
| Product designation | Soft starter |
|---|---|
| Rated operational current at 40 °C | 72 A |
| Motor rating at 400 V | 37 kW |
| Motor rating at 500 V | 45 kW |
| Operating voltage at standard circuit | 400 … 600 V |
| Operating frequency | 50 … 60 Hz |
| Control supply voltage | 110 … 230 V AC/DC |
| Size | S2 |
| Fastening method | screw and snap-on mounting |
| Front protection class | IP20 |
Key Features
Rated operational current is 72 A at 40 °C; standard-circuit motor rating is 45 kW at 500 V and 37 kW at 400 V.
Has an integrated bypass contact system, thyristors, motor overload protection, external reset, and adjustable current limitation.
Control supply is 110 … 230 V AC or DC. Main, auxiliary, and control circuits use screw-type terminals.
Size is S2; dimensions are 55 mm wide, 160 mm high, and 170 mm deep. Fastening uses screw and snap-on mounting.
Front protection class is IP20 with finger-safe protection for vertical contact from the front. Operating ambient temperature is -25 … +60 °C.
Frequently Asked Questions
What is the exact Siemens line item and its rated current?
The line item is Siemens 3RW4038-1BB15, with a rated operational current of 72 A at 40 °C.
What operating voltage and motor ratings are supported?
The operating voltage at the standard circuit is 400 … 600 V. The motor rating is 37 kW at 400 V and 45 kW at 500 V.
What control supply does the soft starter use?
The control supply is 110 … 230 V AC or 110 … 230 V DC.
How is the device mounted and connected?
It uses screw and snap-on mounting. Main, auxiliary, and control circuits use screw-type terminals.
What should be provided for a project quotation?
Provide the requested quantity, destination, schedule context, and any additional BOM line items.
