Pushbutton Switch, DPDT, Momentary, 1A, 28VDC, Solder Terminal, Through Hole-straight
Transistor Output Optocoupler, 1-Element, 3750V Isolation, PLASTIC, SOP-4
Optocoupler DC-IN 1-CH Transistor DC-OUT 4-Pin PDIP Magazine

Optocoupler DC-IN 1-CH Transistor DC-OUT 4-Pin PDIP Magazine