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Allen-Bradley Hardware Product

STC Starting Torque Controllers

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Our Bulletin 154 STC™ Starting Torque Controllers provide a cost-effective, soft-starting solution for low horsepower single- and three-phase squirrel cage induction motors. Our starting torque controllers help reduce mechanical and electrical stress on motor circuits and systems by limiting voltage at startup. This avoids the over-torque and over-current conditions that happen when across-the-line circuits are completed, like when a basic motor control contactor closes.

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STC Starting Torque Controller
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  • Product Selection
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Overview

  • Offers reliable proven technology with solid-state power poles
  • Provides simple commissioning with only two adjustments:
    • Initial Torque Setting (10...80%)
    • Duration of Ramp (0.5…5 sec)
  • Ideal for adding on to existing direct-on-line starters
  • Offers energy savings
  • Less wear and tear on mechanical systems
  • Offers ideal applications such as
    • Basic material handling
    • Fans
    • Pumps
    • Single-phase reduced-voltage starting applications

The previous generation Starting Torque Controller is discontinued and no longer available for sale. This current Bulletin 154 Starting Torque Controller is an excellent replacement for the previous product.


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Specifications

Certifications

China RoHS 25China RoHS 25
UL Listed Component Mark Canadian and United States RequirementsUL Listed Component Mark Canadian and United States Requirements
  • RoHS
  • China RoHS
  • cULus Listed
  • CE Marked

Certifications apply when product is marked. See our Product Certification site for Declarations of Conformity, certificates and other certification details. 

Looking for Additional Information?

To find additional product information including CAD drawing files, 3D models and more use our Product Catalog.

Product Catalog

Documentation

Resource Publication Number Language
Bulletin 154 STC Starting Torque Controllers Product Profile 154-PP001
English
Bulletin 154 Starting Torque Controller Specifications 154-TD001
English
Previous Generation SMC Controllers Application and Product Guide 150-UM003
English
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