11mm Metal Shaft Encoder - EC11 Series. Brought to you by Alps, the EC11 Series rotary encoders are compact and highly reliable. With a robust metal shaft, the EC11 Series of 11mm rotary encoders have an operating life that ranges from competitive to excellent. Features and Benefits:. Typical rating 5V dc, 10mA. EC11E: have an Operating Life of 15,000 Cycles. EC11EH: have an Operating Life of 30,000 cycles. EC11K: have an Operating Life of 100,000 cycles 500,000 cycles 1,000,000 cycles. Operating Temperature 40 to +85