Internal Voltage Drop Indicator Lamp Lead Wire Length D-A73L D-A73CL Reed 24VDC 100VAC 5~40mA 5~20mA Max 2.4V ON:RED L.E.D D-A80L D-A80CL Reed 24VDC/AC or less 100VDC/AC Max 50mA Max 20mA None Diameter 30mm D-F79L ~ 3 Wire Solid State NPN 28VDC or less Max 150mA 5~28VDC 0.8V Max ON:RED L.E.D D-F7PL ~ 3 Wire Solid State PNP 28VDC or less Max 100mA 5~28VDC 0.8V Max ON:RED L.E.D D-J79L D-J79CL