The ISOCOM H21A1 is a versatile optocoupler designed for applications requiring electrical isolation between input and output circuits. Featuring a phototransistor output, the H21A1 provides reliable signal transfer with a high isolation voltage of 5300 Vrms. This optoisolator is suitable for a wide range of applications, including industrial control systems, telecommunications equipment, and medical devices. Supreme Components International is an authorised distributor of ISOCOM components, ensuring you receive genuine, high-quality products. The H21A1 offers fast switching speeds and excellent current transfer ratio (CTR) linearity, making it an ideal choice for demanding applications. Its robust design and high isolation voltage provide enhanced safety and reliability in sensitive electronic systems.