brand new and high quality Specifications: Model: PC817, PC817C, PC817/C, PC817, LTV817, K1010B (Random delivery) Forward current (ICEO): 50mA for Peak forward current (ICE Max): 1A Reverse voltage: 6V Power dissipation: 70 mw The maximum collector / emitter voltage: 35V The maximum collector / emitter voltage: 6V Isolation voltage: 5000V (RMS) Current transfer ratio: 50% (minimum) Collector current: 50mA Collector power dissipation: 150mW Total power dissipation: 200mW Operating temperature: -30 ~ +100 Degrees Celsius Collector emitter saturation voltage: 0.1V Cut-off frequency: 80kHz Number of Pin: 4 Size: app.7x4x7mm/0.28x0.16x0.28in Color: Black Quantity: 50 Pcs Note: No retail package. Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Content: 50 x Optocoupler