BAV21_T26A Equivalent & Substitute Parts

Part Overview

The BAV21_T26A 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, necessitating identification of active equivalent alternatives for ongoing design requirements and procurement needs. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while accommodating available packaging options.

Substiute Parts

BAV21_T26A

onsemiIn Stock: 783BAV21_T26A 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_T26A is determined by the following critical parameters:

Voltage Rating Compatibility: Substitute parts must support the application's maximum reverse voltage requirement. The BAV21_T26A operates at 250 V maximum reverse voltage. Substitute parts rated at 200 V reverse voltage are acceptable for applications where the circuit design does not exceed 200 V, representing a derating scenario.

Current Rating Compatibility: The BAV21_T26A is rated for 200 mA average rectified current. Substitute parts rated at 250 mA or higher provide equal or superior current handling capability and are directly compatible.

Forward Voltage Characteristics: Forward voltage drop at specified current levels affects power dissipation and circuit performance. The BAV21_T26A specifies 1.25 V maximum at 200 mA. Substitute parts with equal or lower forward voltage ratings maintain or improve efficiency.

Reverse Recovery Time: The BAV21_T26A specifies 50 ns reverse recovery time, classified as small signal speed. Substitute parts with identical or faster recovery times maintain switching performance.

Reverse Leakage Current: The BAV21_T26A specifies 100 nA maximum leakage at 200 V. Substitute parts with equal or lower leakage maintain or improve reverse bias performance.

Thermal Rating: The BAV21_T26A operates to 175°C junction temperature maximum. Substitute parts with equal or higher thermal ratings ensure equivalent thermal performance.

Package and Mounting: All substitute parts maintain through-hole axial mounting in DO-35 or equivalent DO-204AH packaging, ensuring mechanical and electrical compatibility with existing PCB designs.

Parameter Comparison

Engineering Selection Recommendations

Voltage Derating Consideration: All substitute parts are rated at 200 V maximum reverse voltage, compared to the BAV21_T26A at 250 V. Selection of substitute parts requires verification that the application circuit design does not exceed 200 V reverse voltage stress. For applications operating at or near 250 V, substitute parts do not provide equivalent voltage margin.

Current Capability Enhancement: All substitute parts provide 250 mA average rectified current rating, exceeding the BAV21_T26A specification of 200 mA. This represents improved current handling capacity and thermal margin in equivalent circuit applications.

Active Product Status: All substitute parts maintain active product status with established supply chains. The BAV21_T26A is obsolete, making substitution necessary for new procurement and long-term design continuity.

Compliance and Certification: All substitute parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements. The BAV21_T26A compliance status is not specified.

Manufacturer Selection: Three substitute options are available from Nexperia USA Inc. (BAV21,113; BAV21,133; BAV21,143) and one from Vishay General Semiconductor - Diodes Division (BAV21-TR). All maintain identical base product number BAV21 designation and are electrically equivalent within the specified parameter set.

Packaging and Inventory: Substitute parts are available in cut tape packaging with substantial inventory levels: BAV21-TR (83,571 pcs), BAV21,113 (29,252 pcs), BAV21,133 (11,688 pcs), and BAV21,143 (5,773 pcs). All maintain through-hole DO-35 axial configuration compatible with existing PCB designs.

Frequently Asked Questions (FAQ)

Q: Can BAV21,113, BAV21,133, or BAV21,143 directly replace BAV21_T26A in all applications?

A: Direct replacement is possible only in applications where the circuit design does not exceed 200 V reverse voltage. The substitute parts are rated at 200 V maximum, compared to the BAV21_T26A at 250 V. For circuits operating at or near 250 V, substitute parts do not provide equivalent voltage margin and require circuit redesign or alternative component selection.

Q: What is the difference between BAV21,113, BAV21,133, and BAV21,143?

A: These three Nexperia parts are electrically identical across all specified parameters. Differences exist only in packaging designations and inventory availability. BAV21,113 has the highest inventory (29,252 pcs), followed by BAV21,133 (11,688 pcs) and BAV21,143 (5,773 pcs). Selection among these three parts is based on procurement availability and packaging requirements.

Q: How does BAV21-TR compare to the Nexperia substitute options?

A: BAV21-TR from Vishay maintains identical electrical specifications for voltage, current, reverse recovery time, and leakage current. The primary difference is lower junction capacitance (1.5 pF versus 5 pF at 0V, 1MHz), which may provide improved high-frequency performance in specific applications. BAV21-TR has the highest inventory availability (83,571 pcs) among all substitute options.

Q: Are all substitute parts compatible with the original DO-35 through-hole package footprint?

A: Yes. All substitute parts maintain through-hole axial mounting in DO-35 or equivalent DO-204AH packaging. PCB footprints designed for BAV21_T26A accommodate all substitute parts without modification.

Q: What is the significance of the 50 ns reverse recovery time specification?

A: The 50 ns reverse recovery time is identical across the BAV21_T26A and all substitute parts, indicating equivalent switching speed performance. This specification classifies these components as small signal diodes suitable for general-purpose rectification and switching applications.

Q: Do the substitute parts meet current environmental compliance requirements?

A: All substitute parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards. The BAV21_T26A compliance status is not specified, making substitution advantageous for designs requiring documented compliance certification.

Q: What forward voltage drop should be expected when operating substitute parts at 200 mA?

A: The Nexperia substitute parts (BAV21,113; BAV21,133; BAV21,143) specify 1.25 V maximum forward voltage at 200 mA, identical to the BAV21_T26A. The Vishay BAV21-TR specifies 1 V maximum at 100 mA, indicating lower forward voltage characteristics that reduce power dissipation in equivalent applications.