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This new "exact replacement" AVR replaces:

  • Leroy Somer R 438 LS/A
  • Leroy Somer R438LS/C
  • Leroy Somer Voltage Regulator AEM110RE017 AVR
  • Leroy Somer Voltage Regulator AEM110RE003 AVR
  • SDMO Voltage Regulator 330410127 AVR
  • SDMO Voltage Regulator 330410164 AVR
  • SDMO Voltage Regulator 330410334 AVR
  • FG Wilson Voltage Regulator 922-045 AVR
  • Cat / Olympian Voltage Regulator 922-045 AVR
  • All versions of Leroy Somer R438 !

NOTE: Our R438 replacement AVR also replaces the obsolete Leroy Somer # RS437. Ask for a conversion diagram if you order this to replace the RS437 regulator.

 NOTICE: High Voltage can be harmful or fatal!
By purchasing or installing this or any voltage regulator from Advanced Service And Parts, LLC, you agree to be responsible for the installation and application. The voltage regulator should be installed by a qualified generator technician.
Advanced Service And Parts, LLC will not be responsible for any incidental or consequential damages or personal injury. Our liability is limited to repair or replacement of the regulator if found defective. We do not manufacture these or any voltage regulator on our site; they are made by various manufacturers.

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  • Part #: R438-A
  • 6 In Stock

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