BAV20WS-G3-18 Equivalent & Substitute Parts

Part Overview

The BAV20WS-G3-18 is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division. This surface-mount component operates at 150 V DC reverse voltage with 250 mA average rectified current and features fast recovery characteristics with a 50 ns reverse recovery time. The device is packaged in SOD-323 (SC-76) format and is supplied in Tape & Reel (TR) configuration. The part is Active status and ROHS3 compliant. Equivalent and substitute parts are identified to support design flexibility, supply chain alternatives, and application-specific requirements where parametric or operational differences are acceptable.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	150	V
Current - Average Rectified (Io)	250	mA
Voltage - Forward (Vf) (Max) @ If	1.25 @ 200 mA	V
Reverse Recovery Time (trr)	50	ns
Current - Reverse Leakage @ Vr	100 nA @ 150 V	nA
Capacitance @ Vr, F	1.5 @ 0V, 1MHz	pF
Operating Temperature - Junction (Max)	150	°C
Package / Case	SC-76, SOD-323	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the BAV20WS-G3-18 are grouped into two categories based on parametric equivalence and manufacturer recommendations:

Parametric Equivalents (Vishay General Semiconductor - Diodes Division): Parts BAV20WS-E3-08, BAV20WS-E3-18, BAV20WS-G3-08, and BAV20WS-HE3-08 share identical electrical specifications with the main part: 150 V reverse voltage, 250 mA average rectified current, 1.25 V forward voltage at 200 mA, 50 ns reverse recovery time, and 100 nA reverse leakage current at 150 V. These parts differ only in packaging configuration (Tape & Reel versus Cut Tape) and in the case of BAV20WS-HE3-08, automotive qualification (AEC-Q101). All maintain the SOD-323 package and Surface Mount mounting type.

Manufacturer Recommended Substitutes (Cross-Manufacturer): Parts BAS20HT1G, BAS21HT1G, BAS21WS-TP, BAV20WS-7-F, BAV21WS-7-F, and NSVBAS21HT3G are offered as alternatives by onsemi, Micro Commercial Co, and Diodes Incorporated. These parts operate within the same SOD-323 package and Surface Mount configuration but exhibit variations in reverse voltage rating (200 V or 250 V), average rectified current (200 mA), and speed classification (Small Signal versus Fast Recovery). Forward voltage remains constant at 1.25 V at 200 mA, and reverse recovery time is 50 ns across all alternatives.

Substitution is permissible where the application circuit tolerates higher reverse voltage ratings and where the reduced average rectified current (200 mA versus 250 mA) does not exceed design requirements. Speed classification differences (Small Signal versus Fast Recovery) reflect different internal recovery characteristics but do not preclude functional substitution in general-purpose rectification applications.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [mA]	Vf (Max) @ 200mA [V]	trr [ns]	Ir @ Vr [nA]	Package	Packaging Type	Temp Junction (Max) [°C]
BAV20WS-G3-18	Vishay	150	250	1.25	50	100 @ 150V	SOD-323	Tape & Reel	150
BAV20WS-E3-08	Vishay	150	250	1.25	50	100 @ 150V	SOD-323	Tape & Reel	150
BAV20WS-E3-18	Vishay	150	250	1.25	50	100 @ 150V	SOD-323	Cut Tape	150
BAV20WS-G3-08	Vishay	150	250	1.25	50	100 @ 150V	SOD-323	Tape & Reel	150
BAV20WS-HE3-08	Vishay	150	250	1.25	50	100 @ 150V	SOD-323	Cut Tape & Digi-Reel	150
BAS20HT1G	onsemi	200	200	1.25	50	1000 @ 200V	SOD-323	Cut Tape & Digi-Reel	150
BAS21HT1G	onsemi	250	200	1.25	50	100 @ 200V	SOD-323	Cut Tape & Digi-Reel	150
BAS21WS-TP	Micro Commercial Co	250	200	1.25	50	100 @ 200V	SOD-323	Tape & Reel	155
BAV20WS-7-F	Diodes Incorporated	150	200	1.25	50	100 @ 150V	SOD-323	Cut Tape & Digi-Reel	150
BAV21WS-7-F	Diodes Incorporated	200	200	1.25	50	100 @ 200V	SOD-323	Cut Tape & Digi-Reel	150
NSVBAS21HT3G	onsemi	250	200	1.25	50	100 @ 200V	SOD-323	Tape & Reel	150

Engineering Selection Recommendations

Parametric Equivalent Selection (Vishay BAV20WS Series): The parts BAV20WS-E3-08, BAV20WS-E3-18, BAV20WS-G3-08, and BAV20WS-HE3-08 are direct parametric equivalents to BAV20WS-G3-18. Selection among these should be based on packaging requirements: Tape & Reel (TR) for automated assembly processes, or Cut Tape (CT) for manual or lower-volume applications. BAV20WS-HE3-08 includes automotive qualification (AEC-Q101) and is suitable for automotive applications requiring this certification. All Vishay variants maintain identical electrical performance and ROHS3 compliance.

Cross-Manufacturer Substitutes with Reduced Current Rating (200 mA): Parts BAV20WS-7-F (Diodes Incorporated), BAS20HT1G (onsemi), BAS21HT1G (onsemi), BAS21WS-TP (Micro Commercial Co), BAV21WS-7-F (Diodes Incorporated), and NSVBAS21HT3G (onsemi) operate at 200 mA average rectified current instead of 250 mA. These parts are suitable for applications where the circuit current requirement does not exceed 200 mA. All maintain 1.25 V forward voltage at 200 mA and 50 ns reverse recovery time. Selection should account for reverse voltage requirements: BAV20WS-7-F and BAS20HT1G provide 150 V and 200 V respectively; BAS21HT1G, BAS21WS-TP, BAV21WS-7-F, and NSVBAS21HT3G provide 250 V.

Compliance and Certification: All substitute parts are ROHS3 compliant and REACH unaffected. BAS21WS-TP supports operating temperatures to 155°C (versus 150°C for other parts). Packaging options include Tape & Reel and Cut Tape & Digi-Reel configurations to accommodate different assembly and supply chain requirements.

Frequently Asked Questions (FAQ)

Q: Can BAV20WS-E3-08 replace BAV20WS-G3-18 directly?

A: Yes. BAV20WS-E3-08 is a parametric equivalent with identical electrical specifications (150 V, 250 mA, 1.25 V forward voltage, 50 ns recovery time). The primary difference is packaging: BAV20WS-E3-08 is supplied in Tape & Reel format, matching the main part's configuration. Both are ROHS3 compliant and Active status.

Q: What is the difference between BAV20WS-HE3-08 and other Vishay equivalents?

A: BAV20WS-HE3-08 includes automotive qualification (AEC-Q101) and is available in Cut Tape & Digi-Reel packaging. Electrically, it is identical to other BAV20WS variants. Selection of this part is appropriate for automotive applications requiring AEC-Q101 certification.

Q: Can I use BAS21HT1G (250 V, 200 mA) instead of BAV20WS-G3-18 (150 V, 250 mA)?

A: Substitution is permissible if the application circuit operates at 200 mA or less and tolerates a higher reverse voltage rating (250 V). The higher voltage rating provides additional safety margin in reverse-biased conditions. Forward voltage and recovery time remain identical at 1.25 V and 50 ns.

Q: What is the impact of using a 200 mA part in a circuit designed for 250 mA?

A: Using a 200 mA rated part in a 250 mA circuit exceeds the component's current specification and is not permissible. The circuit must be verified to operate at or below 200 mA average rectified current before substitution with 200 mA rated alternatives.

Q: Are all substitute parts available in the same SOD-323 package?

A: Yes. All substitute parts listed are packaged in SOD-323 (SC-76) format with Surface Mount mounting type. Packaging configuration (Tape & Reel, Cut Tape, or Cut Tape & Digi-Reel) varies by part number and supplier.

Q: What is the difference between Fast Recovery and Small Signal speed classifications?

A: BAV20WS-G3-18 is classified as Fast Recovery (≤500 ns, >200 mA). Cross-manufacturer substitutes such as BAS20HT1G and BAS21HT1G are classified as Small Signal (≤200 mA, Any Speed). Both classifications achieve 50 ns reverse recovery time. The speed classification reflects the diode's internal design and current handling characteristics but does not preclude functional substitution in general-purpose rectification applications where the circuit current does not exceed the part's rating.

Q: Is BAV20WS-7-F (Diodes Incorporated) a suitable substitute?

A: BAV20WS-7-F is suitable if the application circuit operates at 200 mA or less. It maintains the same 150 V reverse voltage rating, 1.25 V forward voltage, and 50 ns recovery time as the main part. The reduced current rating (200 mA versus 250 mA) is the primary consideration for substitution eligibility.

Q: Can I mix different manufacturers' parts in the same design?

A: Yes. All substitute parts meet identical electrical specifications for forward voltage (1.25 V @ 200 mA) and reverse recovery time (50 ns). Mixing manufacturers is permissible provided each part's voltage and current ratings are respected within the circuit design. ROHS3 compliance and MSL rating (1 - Unlimited) are consistent across all parts.

Q: What packaging should I select for high-volume automated assembly?

A: Tape & Reel (TR) packaging is standard for automated pick-and-place assembly. Options include BAV20WS-G3-18, BAV20WS-E3-08, BAV20WS-G3-08 (Vishay), BAS21WS-TP (Micro Commercial Co), and NSVBAS21HT3G (onsemi). Cut Tape (CT) and Cut Tape & Digi-Reel options are available for lower-volume or manual assembly processes.

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