Vishay hyperfast and ultrafast rectifiers for mains ac-dc

26jun13VishayFRED 400Vishay has introduced 10 solderable hyperfast and ultrafast recovery rectifiers “that include the industry’s first 3A devices in the SMA package, 3A and 4A devices in the SMB package, and 4A and 5A devices in the SMC package,” claimed the firm.

Called ‘FRED Pt’ rectifiers, recovery is said to be both fast and soft, with times from 30-45ns depending on model.

Applications are expected as power factor correction (PFC) diodes, boost diodes for discontinuous conduction mode (DCM), boost diodes for critical conduction mode (CRM), and freewheeling diodes in power switching applications; in LCD TVs, power supplies and electronic lighting ballasts.

Vf ranges from 1.3 to 1.95V, and maximum junction temperature is 175°C.

The devices offer an MSL moisture level of 1 per J-STD-020, LF maximum peak of +260 °C, and they are RoHS-compliant and halogen-free.

lower forward voltage while “H Speed” Hyperfast devices provide a lower reverse recovery charge.

VS-3EMU06-M3 (600V, 1.35V, 41ns) is the 3A SMA ultrafast part, for example.

Tags: ac-dc, forward voltage, moisture level, rohs compliant

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