AU01A

Overview

The AU01A is a fast recovery diode manufactured by Sanken Electric USA Inc., designed for general-purpose electronic equipment. It features a maximum repetitive peak reverse voltage (VRM) of 600 V and an average forward current (IF(AV)) rating of 0.5 A. The device achieves a maximum reverse recovery time (trr) of 400 ns through optimized lifetime control. Electrical characteristics include a maximum forward voltage drop (VF) of 1.7 V at 25 °C and a maximum reverse leakage current of 10 µA at VRM. The component operates within a junction temperature range of -40 to 150 °C and utilizes an axial package with bare leads compliant with RoHS standards.

Feature Summary

• Optimized lifetime control enables a maximum reverse recovery time of 400 ns.
• Axial package construction with bare leads that are lead-free and RoHS compliant.
• Flammability rating equivalent to UL94V-0.

Applications

• Secondary-side rectifier diode in flyback converters
• Secondary-side rectifier diode in LLC converters
• Freewheel diode in offline buck converters
• Freewheel diode in offline buck-boost converters

Procurement Notes

Verify the specific revision number, currently Rev.1.4, against the manufacturer's official documentation prior to implementation. Confirm that the bare lead configuration meets the thermal soldering limits specified in the datasheet, specifically flow soldering at 260 °C for 10 seconds or iron soldering at 350 °C for 3.5 seconds. Ensure the application environment adheres to the general purpose classification and does not involve aerospace, nuclear, or medical systems without explicit manufacturer approval.

Selection Notes

Select this component for circuits requiring a 600 V blocking capability and 0.5 A continuous current handling. The 400 ns reverse recovery time makes it suitable for standard frequency switching applications such as flyback and LLC topologies. Verify that the thermal resistance from junction to lead (22 °C/W) aligns with the system's heat dissipation strategy. Consider the axial physical dimensions (φ2.4 × 2.9L mm) for PCB layout constraints.

Part Context

The AU01A belongs to the AU01 series of fast recovery diodes produced by Sanken Electric Co., Ltd. This series is engineered for efficiency in power conversion stages where moderate speed and high voltage ratings are required. The device serves as a discrete semiconductor solution for rectification and freewheeling duties in AC/DC and DC/DC power supplies.

Replacement Considerations

Publicly confirmed parameter-equivalent substitutes include AU01AV, AU01AV0, AU01AV1, AU01AWK, and AU01AWS, all manufactured by Sanken Electric USA Inc.

FAQ

What is the maximum nonrepetitive peak reverse voltage?

The maximum nonrepetitive peak reverse voltage (VRSM) is 650 V.

How is the junction-to-lead thermal resistance defined?

The thermal resistance Rth(J-L) is 22 °C/W, measured near the root of the pin as illustrated in Figure 1 of the datasheet.

What are the surge forward current capabilities?

The surge forward current (IFSM) is rated at 15 A for a half-cycle sine wave, positive side, 10 ms duration, single shot.