Pushbutton Switch, DPDT, Momentary, 1A, 28VDC, Solder Terminal, Through Hole-straight
AC Input-Transistor Output Optocoupler, 4-Element, 2500V Isolation, PLASTIC, SOP-16
Optocoupler DC-IN 1-CH Transistor DC-OUT 4-Pin PDIP Magazine

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