29. Optocoupler Basics

Question.3

Two optocouplers have similar markings:

Digi-key Part No: APC-817A1-SL
Digi-key Part No: APC-817C1-SL

What do the suffix letters (A, B, C, etc.) usually indicate?

Package color
Manufacturing year
CTR (Current Transfer Ratio) range
Input voltage rating

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