Product Overview
Technical Summary
| Product designation | Soft starter |
|---|---|
| Size of engine control device | S2 |
| Rated operating current | 72 A at 40 °C; 62 A at 50 °C; 60 A at 60 °C |
| Motor rating | 37 kW at 400 V, standard circuit, 40 °C rated value |
| Operating voltage | 200 … 480 V at standard circuit |
| Operating frequency | 50 … 60 Hz |
| Control supply | 24 V AC/DC |
| Main circuit connection | Screw-type terminals |
| Mounting | Screw and snap-on mounting |
| Protection class | IP20 on the front according to IEC 60529 |
| Operating ambient temperature | -25 … +60 °C |
| Product lifecycle | Active Product |
Key Features
SIRIUS S2 soft starter with integrated bypass contact system and thyristors.
37 kW at standard circuit and 40 °C rated value.
72 A at 40 °C, 62 A at 50 °C, and 60 A at 60 °C.
200 … 480 V operating voltage; 24 V AC/DC control supply.
Intrinsic device protection, motor overload protection, external reset, and adjustable current limitation.
Screw-type terminals for main, auxiliary, and control circuits; screw and snap-on mounting.
Frequently Asked Questions
What is the exact product type and size?
It is the Siemens 3RW4038-1BB04 SIRIUS S2 soft starter.
What operating current does this soft starter support?
The rated operating current is 72 A at 40 °C, 62 A at 50 °C, and 60 A at 60 °C.
What operating voltage and control supply are specified?
The operating voltage is 200 … 480 V at standard circuit, and the control supply is 24 V AC/DC.
How is the unit mounted and connected?
It uses screw and snap-on mounting, with screw-type terminals for the main, auxiliary, and control circuits.
