• 1622 E Whaley Street
  • Longview, TX USA 75601
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ZEFTRONICS designs and manufactures the best Voltage Regulators, Alternator and Generator Controllers, Over-Voltage and Parallel Relays and other general aviation (GA) aircraft products. Many of these products are FAA-PMA approved.  As many aircraft mechanics and engineers around the world know from using ZEFTRONICS products to improve system performance and solve electrical charging system (ECS) problems on aircraft, ZEFTRONICS delivers electrical charging system solutions. To save you time and money many products have built-in self and system protection, trouble-shooting lights,  integration of multiple functions, and are customizable.