Siemens 3RW4426-1BC35 Soft Starter

Feature & Principle

It is Siemens SIRIUS 3RW44 series high-performance soft starter. It adopts three-phase thyristor phase angle regulation to realize smooth voltage rise, limit starting inrush current and reduce mechanical impact. Equipped with integrated bypass contact, heat loss is low after motor startup. It supports soft stop, current limiting, motor overload protection and fault alarm, suitable for fans, pumps and other loads. This model is discontinued, replaced by 3RW55 series.

Specifications

Model: 3RW4426-1BC35 Brand: Siemens Series: SIRIUS 3RW44 Rated current: 63 A Main voltage: 400~600 VAC Control supply: 115 VAC Built-in bypass: Yes Terminal: Screw terminal Frequency: 50/60 Hz Application: Water pump, blower, conveyor, HVAC equipment Certification: CE, UL

Components & Diagnostics

Thyristor power module, integrated bypass contactor, main control board, current transformer, cooling fan, status LED. Common faults: thyristor breakdown, bypass contact burnout, overcurrent trip, fan failure, parameter loss.

Product Brief

3RW4426-1BC35 soft starter, Siemens SIRIUS 3RW44 motor starting spare widely used for pump and fan control cabinet overhaul and replacement.