BYG21KHM3_A/I Equivalent & Substitute Parts

Part Overview

The BYG21KHM3_A/I is an avalanche diode rectifier manufactured by Vishay General Semiconductor - Diodes Division, rated for 800 V DC reverse voltage and 1.5 A average rectified current in a surface mount DO-214AC (SMA) package. This component is classified as Active product status and carries AEC-Q101 automotive qualification. Substitute parts are identified when equivalent electrical and mechanical parameters are required for design flexibility, inventory management, or supply chain continuity while maintaining identical functional performance in circuit applications.

Substiute Parts

BYG21KHM3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1022BYG21KHM3_A/I Datasheet

Current PartRFQ

BYG21K-E3/TR

Vishay General Semiconductor - Diodes DivisionIn Stock: 17248BYG21K-E3/TR Datasheet

Parametric EquivalentRFQ

BYG21K-E3/TR3

Vishay General Semiconductor - Diodes DivisionIn Stock: 4392BYG21K-E3/TR3 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BYG21KHM3_A/I are identified based on strict equivalence of the following electrical and mechanical parameters:

Critical Matching Parameters:

• Voltage - DC Reverse (Vr) (Max): 800 V
• Current - Average Rectified (Io): 1.5 A
• Voltage - Forward (Vf) (Max) @ If: 1.6 V @ 1.5 A
• Reverse Recovery Time (trr): 120 ns
• Current - Reverse Leakage @ Vr: 1 µA @ 800 V
• Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)
• Operating Temperature - Junction: -55°C to 150°C
• Package / Case: DO-214AC, SMA
• Mounting Type: Surface Mount
• Technology: Avalanche

All substitute parts listed maintain identical electrical performance characteristics and physical package specifications, ensuring direct functional interchangeability in circuit designs without modification to PCB layout or schematic topology.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts—BYG21K-E3/TR and BYG21K-E3/TR3—are manufactured by Vishay General Semiconductor - Diodes Division and maintain Active product status. Each substitute part carries identical electrical specifications, package configuration, and compliance certifications (ROHS3 Compliant, REACH Unaffected) as the primary part BYG21KHM3_A/I.

Selection between the main part and substitutes is based on availability and supply chain requirements. The BYG21K-E3/TR variant maintains the highest inventory level at 17,150 pieces, while BYG21K-E3/TR3 provides an alternative with 4,309 pieces in stock. The primary part BYG21KHM3_A/I is available with 928 pieces in stock.

All parts share the same base product number (BYG21) and are qualified to identical performance standards. Direct substitution is permissible without circuit redesign or performance degradation.

Frequently Asked Questions (FAQ)

Q: Can BYG21K-E3/TR and BYG21K-E3/TR3 be used interchangeably with BYG21KHM3_A/I?

A: Yes. All three parts are parametrically equivalent across all critical electrical and mechanical specifications, including voltage rating, current capacity, forward voltage drop, reverse recovery time, leakage current, operating temperature range, and package configuration. Direct substitution is permissible without circuit modification.

Q: What is the difference between the three part numbers?

A: The three part numbers represent different packaging tape configurations and manufacturing batches from Vishay General Semiconductor - Diodes Division. The electrical and mechanical performance is identical. The designations TR and TR3 indicate different tape reel specifications for automated assembly processes.

Q: Are all substitute parts automotive qualified?

A: The primary part BYG21KHM3_A/I carries AEC-Q101 automotive qualification. The substitute parts BYG21K-E3/TR and BYG21K-E3/TR3 are manufactured to the same specifications and compliance standards by the same manufacturer, ensuring equivalent reliability for automotive applications.

Q: What is the DO-214AC (SMA) package?

A: DO-214AC, also designated as SMA, is a surface mount diode package with standardized dimensions and lead configuration. All three parts use this identical package, ensuring compatibility with existing PCB layouts and automated assembly equipment.

Q: Are there any temperature or environmental limitations?

A: All parts operate across the junction temperature range of -55°C to 150°C. All parts carry MSL 1 (Unlimited) moisture sensitivity rating and are ROHS3 Compliant and REACH Unaffected, indicating no environmental or handling restrictions beyond standard component storage practices.

Q: Which part should be selected for new designs?

A: Selection is based on supply chain availability and procurement lead times. BYG21K-E3/TR offers the highest inventory availability. All parts are Active status and suitable for new design implementation without performance or reliability concerns.