BAV21WS-G Equivalent & Substitute Parts

Part Overview

The BAV21WS-G is a surface mount switching diode manufactured by Taiwan Semiconductor Corporation, classified as a general-purpose rectifier diode in the SOD-323 package. This component operates at 200V DC reverse voltage with a 200mA average rectified current rating and features a 50ns reverse recovery time, making it suitable for switching applications in compact form factors.

The BAV21WS-G maintains Active product status with full RoHS3 compliance and REACH unaffected certification. Identification of equivalent and substitute parts becomes necessary when managing inventory constraints, addressing supply chain disruptions, or accommodating design flexibility requirements while maintaining electrical and mechanical compatibility.

Substiute Parts

BAV21WS-G

Taiwan Semiconductor CorporationIn Stock: 15211BAV21WS-G Datasheet

Current PartRFQ

BAS321/8F

Nexperia USA Inc.In Stock: 4817BAS321/8F Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BAV21WS-G is determined by strict alignment of the following critical parameters:

Voltage Rating Compatibility: The substitute part must maintain a DC reverse voltage (Vr) rating of 200V or greater to ensure safe operation within the original design envelope.

Current Rating Compatibility: The substitute part must support an average rectified current (Io) rating equal to or exceeding 200mA to handle the intended load without derating.

Package Compatibility: The substitute part must utilize the SOD-323 surface mount package to ensure mechanical fit and assembly compatibility with existing PCB layouts.

Forward Voltage Characteristics: The substitute part must maintain forward voltage (Vf) specifications within acceptable operating ranges to prevent circuit performance degradation.

Reverse Recovery Time: The substitute part must maintain reverse recovery time (trr) specifications consistent with switching application requirements.

Compliance Certification: The substitute part must maintain RoHS3 compliance and REACH unaffected status to satisfy regulatory and environmental requirements.

The BAS321/8F manufactured by Nexperia USA Inc. meets all substitution criteria for the BAV21WS-G within the specified parameter boundaries.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: The BAV21WS-G remains the preferred component choice due to its Active product status, ensuring long-term availability and manufacturing support. This part is recommended for new designs and production applications requiring sustained supply chain reliability.

Substitute Selection Criteria: The BAS321/8F functions as an electrical equivalent substitute when BAV21WS-G availability is constrained. The BAS321/8F meets all critical electrical parameters including voltage rating, reverse recovery time, and leakage current specifications. The higher current rating (250mA versus 200mA) and lower junction capacitance (2pF versus 5pF) of the BAS321/8F provide operational margin in current-limited applications and improved high-frequency performance characteristics.

Compliance Consideration: Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for commercial and industrial applications.

Product Status Impact: The BAS321/8F carries Obsolete product status, indicating discontinued manufacturing. This status restricts its use to inventory depletion scenarios or applications where long-term supply is not a requirement. New designs should not incorporate the BAS321/8F as a primary component selection.

Packaging Format: The BAV21WS-G is supplied in Tape & Reel format, while the BAS321/8F is available in Cut Tape and Digi-Reel formats. Packaging format differences may affect procurement, handling, and assembly processes but do not impact electrical compatibility.

Frequently Asked Questions (FAQ)

Q: Can the BAS321/8F directly replace the BAV21WS-G in existing circuit designs?

A: Yes, the BAS321/8F meets all critical electrical parameters for direct substitution. The 200V reverse voltage rating, 50ns reverse recovery time, and equivalent forward voltage characteristics ensure functional compatibility. The higher current rating (250mA) and lower capacitance (2pF) of the BAS321/8F provide operational margin without requiring circuit modifications.

Q: What is the significance of the different current ratings (200mA versus 250mA)?

A: The BAS321/8F current rating of 250mA exceeds the BAV21WS-G specification of 200mA. This higher rating indicates the substitute part can safely handle greater average rectified current without thermal stress. In applications operating at or below 200mA, this difference does not affect circuit performance. The substitute part operates within its safe operating area with additional margin.

Q: How does the capacitance difference (5pF versus 2pF) affect circuit operation?

A: The BAS321/8F exhibits lower junction capacitance (2pF) compared to the BAV21WS-G (5pF). Lower capacitance reduces parasitic effects in high-frequency switching applications, potentially improving switching speed and reducing switching losses. In low-frequency applications, this difference is negligible. The lower capacitance of the substitute part does not introduce incompatibility.

Q: Are there packaging considerations when substituting these parts?

A: Both parts use the SOD-323 surface mount package with identical mechanical dimensions and PCB footprints. The BAV21WS-G is supplied in Tape & Reel format, while the BAS321/8F is available in Cut Tape and Digi-Reel formats. These packaging format differences affect procurement and handling procedures but do not impact electrical performance or PCB assembly compatibility.

Q: Why is the BAS321/8F listed as Obsolete?

A: Obsolete product status indicates the BAS321/8F has been discontinued by the manufacturer. This status restricts availability to existing inventory only, with no guarantee of future supply. For applications requiring sustained component availability, the Active-status BAV21WS-G is the appropriate selection. The BAS321/8F is suitable only for short-term inventory management or applications with defined end-of-life dates.

Q: Do both parts meet current regulatory compliance requirements?

A: Yes, both the BAV21WS-G and BAS321/8F maintain ROHS3 compliance and REACH unaffected status. These certifications satisfy regulatory requirements for commercial, industrial, and consumer applications in regulated markets. Compliance status is equivalent between the two parts.

Q: What is the operating temperature range difference between these parts?

A: The BAV21WS-G specifies a junction temperature range of -65°C to 150°C, while the BAS321/8F specifies a maximum junction temperature of 150°C. Both parts operate safely at the upper temperature limit of 150°C. The BAV21WS-G provides extended low-temperature operation capability to -65°C. For applications requiring operation below 0°C, the BAV21WS-G is the appropriate selection.