AB01B

Overview

The AB01B is a fast recovery diode manufactured by Sanken Electric Co., Ltd. It features a maximum repetitive peak reverse voltage (VRM) of 800 V and an average forward current (IF(AV)) rating of 0.5 A at 25 °C. The device achieves a maximum reverse recovery time (trr1) of 200 ns through optimized lifetime control. Electrical characteristics include a maximum forward voltage drop (VF) of 2.0 V at IF = 0.5 A and TJ = 25 °C, with a maximum reverse leakage current (IR) of 10 µA at VR = VRM. The component operates within a junction temperature range of -40 to 150 °C and utilizes an axial package with bare leads.

Feature Summary

• Optimized lifetime control enables a fast reverse recovery time of up to 200 ns.
• High voltage capability with a maximum repetitive peak reverse voltage of 800 V.
• Lead-free construction compliant with RoHS directives.
• 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 datasheet revision against the manufacturer's official records prior to procurement. Confirm that the bare lead configuration matches the required soldering parameters, specifically flow soldering at 260 °C for 10 seconds or iron soldering at 350 °C for 3.5 seconds. Ensure the application design accounts for derating curves relative to lead temperature to maintain safe junction temperatures within the specified operational limits.

Selection Notes

Select this component for circuits requiring high-voltage blocking capabilities combined with moderate speed switching characteristics. The 800 V rating suits primary-side or secondary-side applications in isolated power supplies. Evaluate thermal management requirements based on the 22 °C/W junction-to-lead thermal resistance. Consider the 0.5 A average current limit when designing for continuous conduction modes, utilizing the provided derating curves for elevated ambient conditions.

Part Context

This component belongs to the family of fast recovery diodes produced by Sanken Electric. These devices are engineered for general-purpose electronic equipment and apparatus. The AB01B specifically targets efficiency improvements in switch-mode power supplies where reduced reverse recovery charge minimizes switching losses and electromagnetic interference.

Replacement Considerations

Consult the official Sanken Electric documentation for authorized substitute part numbers. Verify that any alternative component meets the identical 800 V reverse voltage, 0.5 A forward current, and axial package dimensions to ensure mechanical and electrical compatibility without circuit redesign.

FAQ

What is the maximum operating junction temperature for the AB01B?

The maximum operating junction temperature (TJ) is 150 °C.

How is the reverse recovery time defined for this diode?

The maximum reverse recovery time (trr1) is 200 ns, measured at IF = IRP = 100 mA with a 90% recovery point at TJ = 25 °C.

What are the absolute maximum ratings for surge forward current?

The surge forward current (IFSM) rating is 10 A for a half-cycle sine wave lasting 10 ms, applied once on the positive side.