HCPL-817-300E – AVAGO

The HCPL-817-300E is a single-channel optocoupler manufactured by AVAGO Technologies, housed in a 4-pin surface-mount (SMD) package. This device provides galvanic isolation up to 5 kVrms between the input and output circuits, enabling safe signal transfer across differing voltage potentials. The input stage consists of an infrared emitting diode (IRED), optically coupled to a silicon NPN phototransistor at the output. The “300” suffix denotes a current transfer ratio (CTR) ranking, specifically guaranteeing a minimum CTR of 50% at an input current (IF) of 5mA and a collector-emitter voltage (VCE) of 5V. Typical applications include signal isolation in digital logic circuits, microcomputer system interfaces, and power supply feedback control. The device exhibits a typical collector-emitter saturation voltage (VCE(sat)) of 0.2V at IF = 5mA and a collector current (IC) of 0.5mA.