12mm Snap-in Insulated Shaft Encoder - EC12 Series. Insulated shaft type with a wide variety of applications EC12D series comes with Push-on Switch Typical rating 5Vdc, 0.5mA Operating life 15,000 cycles (without Detent) 30,000 cycles (with Detent) Operating Temperature 10 to +70 (EC12E) 40 to +85 (EC12D)