BAV21W Equivalent & Substitute Parts

Part Overview

The BAV21W is a general-purpose rectifier diode manufactured by Diodes Incorporated, designed for surface mount applications in the SOD-123 package. This component operates at 250 V DC reverse voltage with 400 mA average rectified current and features fast recovery characteristics with a 50 ns reverse recovery time. The BAV21W is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing design requirements and procurement needs.

Substiute Parts

BAV21W

Diodes IncorporatedIn Stock: 365220BAV21W Datasheet

Current PartRFQ

BAV21W-7-F

Diodes IncorporatedIn Stock: 185495BAV21W-7-F Datasheet

MFR RecommendedRFQ

BAV21W-TP

Micro Commercial CoIn Stock: 3079BAV21W-TP Datasheet

SimilarRFQ

BAV21W_R1_00001

Panjit International Inc.In Stock: 20173BAV21W_R1_00001 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BAV21W is determined by the following critical parameters: package type (SOD-123 surface mount), reverse voltage rating, average rectified current capacity, forward voltage characteristics, and reverse recovery time. The BAV21W operates at 250 V maximum reverse voltage with 400 mA current capacity.

The substitute parts identified fall into two categories based on electrical compatibility:

Category 1 - Full Electrical Equivalent (MFR Recommended): BAV21W-7-F maintains the 400 mA current rating and 250 V reverse voltage capability, making it a direct functional replacement. This part is manufactured by Diodes Incorporated and carries active product status.

Category 2 - Reduced Current Rating Substitutes: BAV21W-TP (Micro Commercial Co) and BAV21W_R1_00001 (Panjit International Inc.) operate at 200 V reverse voltage with 200 mA current capacity. These parts are suitable for applications where the circuit design operates within these reduced electrical parameters.

All substitute parts share the SOD-123 surface mount package, identical reverse recovery time (50 ns), and ROHS3 compliance with the original BAV21W.

Parameter Comparison

Engineering Selection Recommendations

BAV21W-7-F (Diodes Incorporated) is the manufacturer-recommended substitute and the preferred selection for direct replacement. This part maintains electrical equivalence with 400 mA current capacity and 250 V reverse voltage rating. The BAV21W-7-F carries active product status, ensuring long-term availability and supply chain stability. This part is ROHS3 compliant and offers an extended operating temperature range (-65°C to 150°C) compared to the original BAV21W. Packaging is available in Cut Tape and Digi-Reel formats.

BAV21W-TP (Micro Commercial Co) and BAV21W_R1_00001 (Panjit International Inc.) are suitable substitutes only for applications where circuit design parameters operate within 200 V reverse voltage and 200 mA current specifications. Both parts are active products with ROHS3 compliance. Selection between these two requires evaluation of forward voltage characteristics: BAV21W-TP specifies 1.25 V @ 200 mA, while BAV21W_R1_00001 specifies 1 V @ 100 mA. Capacitance differences (1.5 pF versus 5 pF) may affect high-frequency circuit performance.

All substitute parts maintain the SOD-123 surface mount package, 50 ns reverse recovery time, and regulatory compliance of the original BAV21W.

Frequently Asked Questions (FAQ)

Q: Can BAV21W-7-F be used as a direct replacement for BAV21W?

A: Yes. BAV21W-7-F is the manufacturer-recommended equivalent, maintaining identical electrical specifications for reverse voltage (250 V), average rectified current (400 mA), forward voltage (1.25 V @ 200 mA), and reverse recovery time (50 ns). Both use the SOD-123 surface mount package. The primary difference is product status: BAV21W-7-F is active while BAV21W is obsolete.

Q: What are the limitations of BAV21W-TP and BAV21W_R1_00001 as substitutes?

A: Both parts operate at reduced electrical ratings: 200 V maximum reverse voltage and 200 mA average rectified current, compared to the BAV21W specifications of 250 V and 400 mA. These substitutes are suitable only for circuits designed to operate within these lower parameters. Substitution requires circuit analysis to confirm that applied voltages and currents do not exceed these limits.

Q: Are all substitute parts available in the same packaging formats?

A: No. BAV21W-7-F is available in Cut Tape and Digi-Reel formats. BAV21W-TP is supplied in Tape & Reel format. BAV21W_R1_00001 is available in Cut Tape and Digi-Reel formats. Packaging selection depends on manufacturing and assembly requirements.

Q: Do the substitute parts meet the same regulatory compliance as the original BAV21W?

A: Yes. All substitute parts are ROHS3 compliant and REACH unaffected, matching the regulatory status of the original BAV21W. All parts carry the same ECCN (EAR99) and HTSUS (8541.10.0070) classifications.

Q: What is the difference in reverse leakage current between the original and substitute parts?

A: The BAV21W specifies 100 µA reverse leakage at 200 V. All substitute parts specify 100 nA reverse leakage at 200 V, representing a 1000-fold reduction. This improvement in leakage characteristics may benefit low-power or precision circuit applications.

Q: How do capacitance differences affect circuit performance?

A: BAV21W-TP specifies 1.5 pF capacitance at 0V, 1MHz, while BAV21W and BAV21W-7-F specify 5 pF, and BAV21W_R1_00001 specifies 5 pF. Lower capacitance in BAV21W-TP may reduce parasitic effects in high-frequency switching applications. Circuit-specific analysis is required to determine if capacitance differences impact performance.

Q: What is the operating temperature range for each substitute part?

A: BAV21W-7-F operates from -65°C to 150°C, providing a 10°C lower minimum temperature compared to the original BAV21W (-55°C to 150°C). BAV21W-TP and BAV21W_R1_00001 both operate from -55°C to 150°C, matching the original BAV21W temperature range.