The EL817S(B)(TU)-F is a phototransistor optocoupler manufactured by Everlight Electronics. It is a four-pin device that provides electrical isolation between input and output circuits. The optocoupler consists of an infrared emitting diode (IRED) and a phototransistor, allowing signals to be transmitted without a direct electrical connection. The (B)(TU)-F likely refers to specific binning or testing parameters, and the -F indicates that it is lead-free.

Applications

• Switching power supplies
• Programmable controllers
• Facsimile equipment
• Telecommunication equipment
• Computer terminals

Features

• High isolation voltage: Offers electrical isolation between the input and output.
• Compact package: Saves space on the circuit board.
• Current transfer ratio (CTR): Defines the efficiency of current transfer from input to output.
• Low saturation voltage: Reduces power dissipation in the output circuit.
• Pb-free: Compliant with RoHS standards.

Benefits

• Enhanced safety: Provides electrical isolation for user and equipment protection.
• Noise reduction: Isolates sensitive circuits from noise and interference.
• Simplified circuit design: Allows for easy interfacing between circuits with different ground potentials.
• Reliable signal transfer: Ensures accurate signal transmission.

Technical Specifications

The EL817S(B)(TU)-F has a high isolation voltage rating (typically several kilovolts). The current transfer ratio (CTR) varies depending on the specific bin. The collector-emitter saturation voltage is low. The operating temperature range is specified in the datasheet. It is packaged in a 4-pin DIP (Dual In-Line Package). Refer to the Everlight datasheet for detailed specifications and application information.