BAV21WS-7-G Equivalent & Substitute Parts

Part Overview

The BAV21WS-7-G is a general-purpose rectifier diode manufactured by Diodes Incorporated, rated for 200V DC reverse voltage and 200mA average rectified current in a surface mount SOD-323 package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The BAV21WS-7-G serves applications requiring small-signal rectification with fast recovery characteristics and operates across a wide junction temperature range of -65°C to 150°C.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	200 V
Current - Average Rectified (Io)	200 mA
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	SC-76, SOD-323
Mounting Type	Surface Mount
Operating Temperature - Junction	-65°C ~ 150°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the BAV21WS-7-G is determined by electrical and mechanical parameter equivalence within the small-signal rectifier diode category. The critical parameters governing substitution are:

Voltage Rating: 200V DC reverse voltage maximum
Current Rating: 200mA average rectified current
Package: SOD-323 surface mount form factor
Forward Voltage: 1.25V maximum at rated current
Reverse Recovery Time: 50ns
Reverse Leakage: 100nA at rated voltage
Temperature Range: -65°C to 150°C junction operating range
Compliance: ROHS3 compliance and MSL 1 rating

All substitute parts listed maintain these core electrical specifications and physical package compatibility, enabling direct functional replacement in circuit applications. Variations in secondary parameters such as capacitance or leakage measurement conditions do not preclude substitution when primary ratings align.

Parameter Comparison

Parameter	BAV21WS-7-G (Diodes Inc.)	BAV21WS-7-F (Diodes Inc.)	BAV20WSHE3-TP (MCC)	BAV21WS-G RRG (TSC)	BAV21WS-TP (MCC)	CDSV-21-G (Comchip)
Voltage - DC Reverse (Vr) (Max)	200 V	200 V	200 V	200 V	200 V	200 V
Current - Average Rectified (Io)	200 mA	200 mA	200 mA	200 mA	200 mA	200 mA
Voltage - Forward (Vf) (Max) @ If	1.25 V @ 200 mA	1.25 V @ 200 mA	1.25 V @ 200 mA	1.25 V @ 100 mA	1.25 V @ 200 mA	1.25 V @ 200 mA
Reverse Recovery Time (trr)	50 ns	50 ns	50 ns	50 ns	50 ns	50 ns
Current - Reverse Leakage @ Vr	100 nA @ 200 V	100 nA @ 200 V	100 nA @ 150 V	100 nA @ 200 V	100 nA @ 200 V	100 nA @ 200 V
Capacitance @ Vr, F	5 pF @ 0V, 1MHz	5 pF @ 0V, 1MHz	1.5 pF @ 0V, 1MHz	5 pF @ 0V, 1MHz	1.5 pF @ 0V, 1MHz	5 pF @ 0V, 1MHz
Package / Case	SC-76, SOD-323	SC-76, SOD-323	SC-76, SOD-323	SC-76, SOD-323	SC-76, SOD-323	SC-76, SOD-323
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Operating Temperature - Junction	-65°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Recommendation: BAV21WS-7-F

The BAV21WS-7-F manufactured by Diodes Incorporated is the direct functional equivalent to the BAV21WS-7-G. This part maintains identical electrical specifications across all critical parameters and carries active product status, ensuring long-term availability and supply chain continuity. The BAV21WS-7-F is available in Cut Tape and Digi-Reel packaging formats and holds ROHS3 compliance with MSL 1 rating.

Secondary Recommendations: BAV21WS-TP and BAV21WS-G RRG

The BAV21WS-TP manufactured by Micro Commercial Co and BAV21WS-G RRG manufactured by Taiwan Semiconductor Corporation both maintain the core electrical specifications of the BAV21WS-7-G. Both parts are active products with ROHS3 compliance. The BAV21WS-TP offers the highest inventory availability at 144,045 pieces. The BAV21WS-G RRG is supplied in Tape & Reel packaging with 20,300 pieces in stock.

Alternative Consideration: BAV20WSHE3-TP

The BAV20WSHE3-TP manufactured by Micro Commercial Co meets all primary electrical requirements and is qualified to AEC-Q101 automotive standards. This part carries active product status and ROHS3 compliance. The reverse leakage specification is measured at 150V rather than 200V, and capacitance is specified at 1.5pF. These variations do not affect functional substitution for general-purpose rectification applications.

Tertiary Option: CDSV-21-G

The CDSV-21-G manufactured by Comchip Technology provides electrical equivalence with all critical parameters matching the BAV21WS-7-G. This part is active and ROHS3 compliant. Inventory availability is limited at 1,129 pieces.

All substitute parts are surface mount SOD-323 package devices with identical mounting compatibility and operating temperature ranges. Selection among active alternatives should prioritize availability, packaging format requirements, and supply chain preferences.

Frequently Asked Questions (FAQ)

Q: Can the BAV21WS-7-G be directly replaced with BAV21WS-7-F?

A: Yes. The BAV21WS-7-F is a direct parametric equivalent with identical voltage rating (200V), current rating (200mA), forward voltage (1.25V @ 200mA), reverse recovery time (50ns), and package (SOD-323). The primary difference is product status: BAV21WS-7-F is active while BAV21WS-7-G is obsolete.

Q: What is the difference between BAV21WS-TP and BAV21WS-7-F?

A: Both parts maintain identical electrical specifications for voltage, current, forward voltage, and reverse recovery time. The primary differences are manufacturer (Micro Commercial Co versus Diodes Incorporated) and packaging format (Tape & Reel versus Cut Tape/Digi-Reel). Capacitance is specified at 1.5pF for BAV21WS-TP versus 5pF for BAV21WS-7-F, but both meet the functional requirements for small-signal rectification.

Q: Is the BAV20WSHE3-TP suitable for non-automotive applications?

A: Yes. The BAV20WSHE3-TP meets all electrical specifications required for general-purpose rectification applications. The AEC-Q101 automotive qualification indicates enhanced reliability screening but does not restrict use in non-automotive circuits. The part is ROHS3 compliant and carries MSL 1 rating.

Q: Why do some substitute parts have different capacitance values?

A: Capacitance variation between 1.5pF and 5pF at 0V and 1MHz does not affect substitution suitability for rectifier diode applications. Both values are within acceptable ranges for small-signal diodes and do not impact forward conduction, reverse blocking, or recovery characteristics.

Q: Are all substitute parts available in the same package?

A: Yes. All substitute parts listed are supplied in SOD-323 surface mount package format (SC-76 case designation). Physical dimensions and PCB footprint compatibility are identical across all alternatives.

Q: What is the significance of MSL 1 rating?

A: MSL 1 (Moisture Sensitivity Level 1) indicates unlimited shelf life without moisture control requirements. All listed parts carry MSL 1 rating, eliminating moisture-related handling constraints during storage and assembly.

Q: Can BAV21WS-G RRG be used as a drop-in replacement?

A: Yes. The BAV21WS-G RRG maintains all critical electrical specifications and SOD-323 package compatibility. The forward voltage specification is measured at 100mA rather than 200mA, but the 1.25V maximum rating remains valid at the full 200mA operating current.

Q: Which substitute part offers the best availability?

A: The BAV21WS-TP manufactured by Micro Commercial Co offers the highest inventory availability at 144,045 pieces in stock, followed by BAV21WS-7-F at 65,610 pieces.

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