The EL817S1 A is a single channel, surface mount phototransistor optocoupler from Everlight Electronics. It consists of an infrared emitting diode optically coupled to a phototransistor. It is commonly used for electrical isolation in various applications.

Applications

• Power Supplies
• Programmable Controllers
• Factory Automation
• Office Automation Equipment
• Telecommunication Equipment
• Signal Transmission between circuits of different potentials and impedances

Features

• Current Transfer Ratio (CTR): 50% ~ 600% (at IF = 5mA, VCE = 5V)
• High Isolation Voltage: 5000 Vrms
• Operating Temperature: -30°C to +100°C
• Compliance with RoHS and REACH standards
• Compact Small Outline Package (SOP)
• Pb Free and Halogen Free

Benefits

• Provides electrical isolation between input and output circuits
• Protects sensitive circuits from high voltage transients
• Reduces noise and interference in signal transmission
• Improves system safety and reliability
• Simplifies circuit design
• Long operational lifetime

Additional Details

The EL817S1 A offers excellent performance and reliability in a compact package. The high isolation voltage ensures safe operation in high-voltage environments. The wide operating temperature range makes it suitable for various industrial and commercial applications. The device features a low input current, which minimizes power consumption. The output transistor can be used in either a common-emitter or common-collector configuration. The current transfer ratio (CTR) is an important parameter that determines the output current for a given input current. The EL817S1 A offers a CTR range of 50% to 600%, providing flexibility in circuit design. Everlight provides comprehensive datasheets and application notes to support the EL817S1 A, simplifying the design process. It is important to note that other variations of the EL817 series exist with different CTR ranges.