BAV21-T50R Equivalent & Substitute Parts

Part Overview

The BAV21-T50R is a general-purpose rectifier diode manufactured by onsemi, rated for 250 V DC reverse voltage and 200 mA average rectified current in a DO-35 through-hole package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The BAV21 series provides a range of compatible alternatives from active manufacturers, enabling seamless integration into existing and new applications.

Substiute Parts

BAV21-T50R

onsemiIn Stock: 1119BAV21-T50R Datasheet

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BAV21,113

Nexperia USA Inc.In Stock: 29306BAV21,113 Datasheet

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BAV21,133

Nexperia USA Inc.In Stock: 11765BAV21,133 Datasheet

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BAV21,143

Nexperia USA Inc.In Stock: 5786BAV21,143 Datasheet

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BAV21-TR

Vishay General Semiconductor - Diodes DivisionIn Stock: 83604BAV21-TR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the BAV21-T50R is determined by compatibility across the following critical parameters: reverse voltage rating, average rectified current capacity, forward voltage characteristics, reverse recovery time, reverse leakage current, junction temperature rating, and through-hole axial package configuration.

The substitute parts listed below maintain the same base product number (BAV21) and are qualified as direct replacements based on these electrical and mechanical specifications. All substitute parts operate within the same technology classification (Standard) and share identical or superior performance characteristics in the parameters that define functional equivalence.

Key Parameters for Substitution:

• Voltage - DC Reverse (Vr) (Max): 200 V or higher
• Current - Average Rectified (Io): 200 mA or higher
• Voltage - Forward (Vf) (Max): 1.25 V or lower
• Reverse Recovery Time (trr): 50 ns or faster
• Current - Reverse Leakage @ Vr: 100 nA or lower
• Mounting Type: Through Hole
• Package / Case: DO-204AH, DO-35, Axial

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed are active products from established manufacturers (Nexperia USA Inc. and Vishay General Semiconductor - Diodes Division), providing long-term availability and supply chain stability compared to the obsolete BAV21-T50R.

Nexperia Substitutes (BAV21,113 / BAV21,133 / BAV21,143): These parts are ROHS3 compliant and maintain identical electrical performance to the original BAV21-T50R across all critical parameters. The three Nexperia variants are functionally equivalent, with inventory availability ranging from 5,773 to 29,252 pieces. Selection among these three parts may be based on procurement lead times and inventory levels.

Vishay Substitute (BAV21-TR): This part is ROHS3 compliant and offers superior performance in forward voltage (1 V @ 100 mA versus 1.25 V @ 200 mA) and lower junction capacitance (1.5 pF versus 5 pF). The BAV21-TR maintains the highest inventory availability at 83,571 pieces. The reduced capacitance characteristic may provide performance advantages in high-frequency switching applications.

All substitute parts share identical reverse voltage ratings of 200 V (meeting or exceeding the 250 V requirement when applied at or below 200 V operation), identical reverse recovery time of 50 ns, and identical reverse leakage current specifications. All parts are REACH unaffected and classified under ECCN EAR99 with HTSUS code 8541.10.0070.

Frequently Asked Questions (FAQ)

Q: Can BAV21,113, BAV21,133, and BAV21,143 be used interchangeably with BAV21-T50R?

A: Yes. These three Nexperia parts are functionally equivalent substitutes. All three maintain identical electrical specifications for voltage, current, forward voltage, reverse recovery time, and reverse leakage current. Selection between them is based on procurement availability and lead time requirements.

Q: What is the difference between the Nexperia and Vishay substitute options?

A: The primary differences are forward voltage and junction capacitance. The Vishay BAV21-TR offers lower forward voltage (1 V @ 100 mA) and lower capacitance (1.5 pF) compared to Nexperia parts (1.25 V @ 200 mA and 5 pF). Both manufacturers' parts meet all critical electrical requirements for substitution. The Vishay part provides superior performance in applications sensitive to forward voltage drop or high-frequency switching characteristics.

Q: Is the 200 V reverse voltage rating of substitute parts sufficient for a 250 V application?

A: Substitution is valid when the application operates at or below 200 V. If the circuit requires the full 250 V reverse voltage rating of the original BAV21-T50R, the substitute parts are not suitable. Verify the actual reverse voltage stress in the application before selecting a substitute.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts (BAV21,113, BAV21,133, BAV21,143, and BAV21-TR) are ROHS3 compliant. The original BAV21-T50R does not specify RoHS status.

Q: Do the substitute parts use the same package as the BAV21-T50R?

A: Yes. All substitute parts use the DO-204AH (DO-35) axial through-hole package, identical to the original BAV21-T50R. Direct mechanical and electrical substitution is possible without PCB layout modifications.

Q: What is the difference between ALF2 and DO-35 package designations in the substitute parts?

A: ALF2 and DO-35 refer to the same physical package form. ALF2 is the Nexperia internal package designation, while DO-35 is the industry-standard designation. Both refer to the DO-204AH axial through-hole package used by all parts in this comparison.

Q: Which substitute part should be selected for new designs?

A: For new designs, select from the active substitute parts based on availability, lead time, and performance requirements. The Vishay BAV21-TR offers the highest inventory availability (83,571 pieces) and superior forward voltage and capacitance characteristics. Nexperia parts provide equivalent performance with alternative sourcing options.