The H11AA1, H11AA2, H11AA3, H11AA4 devices consist of two gallium–arsenide infrared emitting diodes connected in inverse parallel, optically coupled to a monolithic silicon phototransistor detector.

• Built–In Protection for Reverse Polarity
• Guaranteed CTR Minimum Values as High as 100%
• Guaranteed Minimum/Maximum Symmetry Limits
• To order devices that are tested and marked per
   VDE 0884 requirements, the suffix ”V” must be
   included at end of part number. VDE 0884 is a test option.

APPLICATIONs
• Detecting or Monitoring ac Signals
• AC Line/Digital Logic Isolation
• Programmable Controllers
• Interfacing and coupling systems
   of different potentials and impedances
• AC/DC — Input Modules