AsiaThe OR-3H7B-TP Optocouplers SMD-4 RoHS are a RoHS certified product manufactured by Orient Asia. The product is an SMD optocoupler, which combines a Phototransistor with a GaA1As infrared emitting diode in a single package. It has a package dimension of 5.3mm (L) x 5.2mm (W) x 7.2mm (H) and an insulation distance of 8mm, allowing it to be used in a variety of applications. It has a current transfer ratio of 100% and a wide operating temperature range of -40 to +85°C. Its operating voltage is from 4.5V to 20V and the maximum peak forward current is 1A. It has high immunity to noise and excellent stability, making it an ideal choice for use in various electronic applications.