BAV21W-HF Equivalent & Substitute Parts

Part Overview

The BAV21W-HF is a general-purpose rectifier diode manufactured by Comchip Technology, designed for surface mount applications in the SOD-123 package. This component operates at 200V DC reverse voltage with 200mA average rectified current capability and is classified as a small signal diode with fast switching characteristics. The part maintains Active product status and is RoHS3 compliant with unlimited moisture sensitivity rating.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across the specified parameter set, enabling direct replacement in circuit designs without functional degradation.

Substiute Parts

BAV21W-HF

Comchip TechnologyIn Stock: 3439BAV21W-HF Datasheet

Current PartRFQ

BAV20W-HF

Comchip TechnologyIn Stock: 4222BAV20W-HF Datasheet

Parametric EquivalentRFQ

BAV21W-7-F

Diodes IncorporatedIn Stock: 185495BAV21W-7-F Datasheet

Parametric EquivalentRFQ

BAV21W-G RHG

Taiwan Semiconductor CorporationIn Stock: 1671BAV21W-G RHG Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BAV21W-HF is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Parameters:

• Voltage - DC Reverse (Vr) (Max): 200 V
• Voltage - Forward (Vf) (Max) @ If: 1.25 V @ 200 mA
• Reverse Recovery Time (trr): 50 ns
• Current - Reverse Leakage @ Vr: 100 nA @ 200 V
• Capacitance @ Vr, F: 5 pF @ 0V, 1MHz
• Package / Case: SOD-123
• Mounting Type: Surface Mount
• Operating Temperature - Junction: -65°C to 150°C
• Technology: Standard
• Speed Classification: Small Signal ≤ 200mA (Io), Any Speed

Allowable Variation Parameters:

• Current - Average Rectified (Io): Equal or greater than 200 mA
• Manufacturer: Different manufacturers permitted
• Packaging Format: Tape & Reel (TR) or Cut Tape (CT) & Digi-Reel®
• Inventory Availability: No restriction

Substitute parts meeting all mandatory equivalence criteria and allowable variation parameters are classified as direct replacements suitable for circuit-level substitution.

Parameter Comparison

Engineering Selection Recommendations

BAV20W-HF (Comchip Technology)

This substitute maintains identical electrical specifications to the BAV21W-HF across all critical parameters with one exception: reverse leakage current is specified at 150V rather than 200V. All other characteristics including forward voltage, reverse recovery time, capacitance, and thermal range are equivalent. Both parts share Comchip Technology manufacturing, identical packaging format (Tape & Reel), and RoHS3 compliance. This part is suitable for direct substitution in applications where the reverse leakage specification at 150V is acceptable.

BAV21W-7-F (Diodes Incorporated)

This substitute provides equivalent electrical performance across all mandatory parameters with enhanced current capability: 400mA average rectified current versus 200mA in the BAV21W-HF. Forward voltage, reverse recovery time, reverse leakage current, and capacitance are identical. The part is manufactured by Diodes Incorporated and supplied in Cut Tape (CT) & Digi-Reel® packaging format rather than Tape & Reel. RoHS3 compliance and REACH Unaffected status are confirmed. The increased current rating provides design margin in applications operating at or near the 200mA specification of the original part.

BAV21W-G RHG (Taiwan Semiconductor Corporation)

This substitute is electrically and mechanically equivalent to the BAV21W-HF across all specified parameters. Manufactured by Taiwan Semiconductor Corporation and supplied in Tape & Reel packaging, this part maintains identical voltage ratings, forward voltage characteristics, reverse recovery time, reverse leakage current, and capacitance specifications. RoHS3 compliance and REACH Unaffected status are confirmed. This part is suitable for direct substitution with no functional or performance differences.

All substitute parts maintain Active product status and are available in production quantities.

Frequently Asked Questions (FAQ)

Q: Can BAV20W-HF be used as a direct replacement for BAV21W-HF?

A: BAV20W-HF is electrically equivalent to BAV21W-HF across all critical parameters including voltage rating, forward voltage, reverse recovery time, and capacitance. The reverse leakage current specification differs in test voltage (150V versus 200V), but this does not prevent substitution in applications designed for the BAV21W-HF. Both parts are manufactured by Comchip Technology in identical SOD-123 surface mount packaging.

Q: What is the primary difference between BAV21W-7-F and BAV21W-HF?

A: The BAV21W-7-F provides 400mA average rectified current capacity compared to 200mA in the BAV21W-HF. All other electrical characteristics including voltage ratings, forward voltage, switching speed, and thermal range are identical. The BAV21W-7-F is manufactured by Diodes Incorporated and supplied in Cut Tape & Digi-Reel® format. The higher current rating makes this part suitable for applications requiring additional current margin.

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

A: No. BAV21W-HF and BAV20W-HF are supplied in Tape & Reel (TR) format. BAV21W-7-F is supplied in Cut Tape (CT) & Digi-Reel® format. All three parts use the SOD-123 surface mount package. Packaging format selection depends on assembly process requirements and procurement specifications.

Q: Do all substitute parts meet RoHS3 compliance?

A: Yes. BAV21W-HF, BAV20W-HF, BAV21W-7-F, and BAV21W-G RHG are all RoHS3 compliant. BAV21W-7-F and BAV21W-G RHG additionally carry REACH Unaffected status.

Q: What is the operating temperature range for these diodes?

A: All parts including BAV21W-HF and its substitutes operate across a junction temperature range of -65°C to 150°C, providing equivalent thermal performance across the product group.

Q: Can BAV21W-G RHG replace BAV21W-HF in all applications?

A: Yes. BAV21W-G RHG manufactured by Taiwan Semiconductor Corporation is electrically and mechanically equivalent to BAV21W-HF across all specified parameters. Both parts maintain identical voltage ratings, forward voltage characteristics, reverse recovery time, reverse leakage current, and capacitance. Both are supplied in Tape & Reel packaging and are RoHS3 compliant.

Q: What determines whether a part qualifies as a substitute?

A: Substitution eligibility is determined by equivalence across mandatory parameters: voltage rating (200V), forward voltage (1.25V @ 200mA), reverse recovery time (50ns), reverse leakage current (100nA @ 200V), capacitance (5pF @ 0V, 1MHz), package type (SOD-123), mounting method (surface mount), and operating temperature range (-65°C to 150°C). Current rating may be equal or greater than the original specification.