SIP- XX-XX X X X a b c d ea : Contact Form : 1A=1 Form A, 1B=1 Form Bb : Nominal Coil Voltage : 05=5V, 12=12V, 24=24Vc : Nil=Standard Type, D=Diode, S=Magentic Shield, N=Diode+Magnetic Shieldd : Special code : Nil=Standard Type, U=High-Sensitivity Typee : Special code : Nil=Standard Type, Y or C=ATE Grade