US3M SMD Ultra-Fast Rectifier Diodes Incorporated US3M SMD Ultra-Fast Rectifier is a glass passivated rectifier in the SMC package. The glass passivated die construction offers high reliability, ideal for power supplies and lighting ballasts. The US3M rectifier features high current capability, ultra-fast recovery time, and high efficiency. This rectifier operates at 1000VRRM, 3A IO, 1.8VF, and 10µA IR.