Description
Product Overview
The Siemens 3RW4074-6BB35 soft starter from the SIRIUS S12 series is engineered for smooth motor acceleration, reducing wear on motors and connected equipment. Rated for 248 A and 250 hp at 575 V, it operates in demanding industrial environments up to 50 °C.
Equipped with screw terminals and compatible with a 115 V AC control supply, this unit provides reliable performance in motor control applications. As a phased-out product, customers are advised to use the Siemens SIRIUS 3RW5 series as the preferred successor for long-term availability and advanced functionality.
Key Features
Official Product Number: 3RW4074-6BB35
Siemens SIRIUS S12 soft starter
Rated current: 248 A, power: 250 hp at 575 V
Operating voltage: 400–600 V AC
Control supply: 115 V AC
Screw terminal connections
Operating temperature: up to 50 °C
Status: phased-out product (successor: Siemens SIRIUS 3RW5)
Warranty & After-Sales
12-month warranty from delivery date
Technical consultation available for migration to SIRIUS 3RW5
Fast replacement services provided
Delivery Time
Standard delivery: 3–5 working days
Expedited shipping available upon request
Why Choose KaiRock
Reliable sourcing of Siemens SIRIUS products
Support for both active and phased-out components
Competitive global pricing for traders and integrators
Professional migration assistance for system upgrades
Applications
Soft starting of motors in industrial automation
Reducing mechanical stress on pumps, fans, and conveyors
Replacement and upgrade projects (migration to SIRIUS 3RW5)
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