US2x-HF SMD Ultra-Fast Recovery Rectifiers Comchip Technology US2x-HF SMD Ultra-Fast Recovery Rectifiers provide 50V to 1000V reverse voltage range. These rectifiers feature glass passivated chip junction, high-efficiency, and low profile package. The US2x-HF rectifiers are easy to pick and place, offer 2A forward current, and come in the SMA/DO-214AC package. These rectifiers are ideal for surface mounted applications.