5PCS PC123 Transistor Optocoupler Isolator-Transistor/Photoelectric Output DIP-4 Pin IC Chip

5PCS PC123 Transistor Optocoupler Isolator-Transistor/Photoelectric Output DIP-4 Pin IC Chip

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10PCS PC123 DIP-4 Optical Isolator - Transistor / Optoelectronic Output IC DIP

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