Home › Manufacturers › Siemens › 3RW4426-3BC44

Siemens

Siemens SIRIUS 3RW4426-3BC44 Soft Starter - 77A (400V), 37kW

Siemens SIRIUS 3RW4426-3BC44 Soft Starter - 77A (400V)

● In Stock 12-Mo Warranty Same-Day Dispatch Ships Worldwide 🎖 Veteran-Owned

In Stock — Ready to Ship

ManufacturerSiemens

Part number3RW4426-3BC44

Standard Rating (400V) 77 A, 37 kW

Inside-Delta Rating (400V) 133 A, 75 kW

Voltage Range 200-460 V AC

Terminals Spring-type

Get a price for 3RW4426-3BC44

Response within 1 business hour

🛡

12-month warranty

All units tested

⚡

Same-day dispatch

Order by 2pm CST

🌐

Worldwide delivery

US, EU, Asia, Middle East

🎖

Veteran-owned

CAGE: 9NK75

Smooth Motor Acceleration Reduced Inrush Current Spring-Type Terminals Compact SIRIUS Design High Power Handling

Product description

The Siemens 3RW4426-3BC44 is a SIRIUS soft starter designed for smooth acceleration of three-phase motors. At 400V and 40°C ambient temperature, it is rated for 77A and 37kW in standard applications. When used in an inside-delta configuration, it handles 133A and 75kW. This unit operates on AC voltages between 200-460V and features convenient spring-type terminals.

This soft starter is ideal for reducing mechanical stress on machinery and electrical inrush current when starting motors. Applications include pumps, fans, compressors, conveyors, and other industrial equipment where soft start functionality is beneficial for system longevity and energy efficiency.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens 3RW4426-3BC44. Please note this is a phased-out product; consider the preferred successor 3RW5526-3HA14. Secure your parts from a trusted source committed to quality and service.

Technical specifications

Standard Rating (400V)	77 A, 37 kW
Inside-Delta Rating (400V)	133 A, 75 kW
Voltage Range	200-460 V AC
Terminals	Spring-type
Product Status	Phased-out

Common applications

Pump Control

Fan Control

Conveyor Systems

Compressor Starters

Industrial Motor Applications

Compatible systems

Three-Phase AC Induction Motors Control Systems Requiring Soft Start

Also known as

Siemens SIRIUS Soft Starter 3RW44 Soft Starter 77A Motor Starter

Replaces / compatible with

This is a phased-out product. The preferred successor is the Siemens SIRIUS 3RW5526-3HA14.

Technical note

Expert tip

While this product is phased out, its spring-type terminals offer a secure and vibration-resistant connection, simplifying installation.

What happens next?

Email confirmation

Immediate receipt acknowledgment sent to you

Account manager assigned

Confirms your part's spec and condition

Your quote delivered

Tailored to your specific requirements

Frequently asked questions

What is the standard and inside-delta current rating for the Siemens 3RW4426-3BC44 soft starter at 400V?

At 400V, the Siemens 3RW4426-3BC44 soft starter is rated for 77A and 37kW in a standard connection. In an inside-delta connection, it can handle up to 133A and 75kW.