BYG21KHE3_A/H

Overview

The BYG21KHE3_A/H is a fast avalanche SMD rectifier manufactured by Vishay General Semiconductor. It features a glass passivated pellet chip junction and operates in the SMA (DO-214AC) package. The device supports an average forward current of 1.5 A and offers maximum repetitive peak reverse voltages of 800 V or 1000 V. Key electrical parameters include a peak forward surge current of 30 A, a maximum reverse current of 1.0 μA at 25 °C, and a typical reverse recovery time of 120 ns. The component is designed for high reliability with controlled avalanche characteristics and meets MSL level 1 standards.

Feature Summary

• Glass passivated pellet chip junction for enhanced reliability
• Soft recovery characteristic combined with fast reverse recovery time
• Controlled avalanche characteristics for robust performance
• Low profile package optimized for automated placement

Applications

• Fast switching rectification in power supplies
• Inverter and converter circuits
• Freewheeling diodes for consumer electronics
• Automotive electronic systems
• Telecommunication equipment

Procurement Notes

Verify the specific voltage rating required for the application, as the BYG21K variant provides 800 V while the BYG21M provides 1000 V. Confirm that the HE3 suffix indicates RoHS compliance and AEC-Q101 qualification for automotive use. Ensure the ordering code matches the desired packaging format, such as the H suffix for 7-inch tape and reel delivery. Cross-reference the datasheet revision date to ensure the latest specifications are being utilized during procurement.

Selection Notes

Select this component when a low-profile surface mount rectifier with fast switching capabilities is required. The device is suitable for applications demanding high surge current handling up to 30 A. Consider the thermal resistance values provided for different mounting conditions to ensure adequate heat dissipation. Verify that the operating temperature range of -55 °C to +150 °C aligns with the environmental constraints of the target system.

Part Context

This part belongs to the BYG21 series of fast avalanche SMD rectifiers from Vishay. The series includes variants like BYG21K and BYG21M, distinguished primarily by their maximum repetitive peak reverse voltage ratings. These components are engineered for general-purpose rectification in modern electronic designs where space constraints and switching speed are critical factors.

Replacement Considerations

Direct substitutes within the same family include the BYG21MHE3_A/H for 1000 V applications. Other Vishay parts in the DO-214AC package may serve as alternatives if electrical parameters match, but verification of reverse recovery time and avalanche energy ratings is essential before substitution.

FAQ

What is the difference between the BYG21K and BYG21M variants?

The primary difference is the maximum repetitive peak reverse voltage. The BYG21K is rated for 800 V, while the BYG21M is rated for 1000 V. All other listed electrical characteristics remain consistent between the two.

Is the BYG21KHE3_A/H qualified for automotive applications?

Yes, the HE3 suffix indicates that the component is AEC-Q101 qualified, making it suitable for automotive electronic systems as specified in the typical applications section.