BAS21VD,165 Equivalent & Substitute Parts

Part Overview

The BAS21VD,165 is a general-purpose diode array manufactured by Nexperia USA Inc., configured as three independent diodes in a surface mount SC-74 (SOT-457) package. This component is classified as Active product status and carries automotive-grade qualification under AEC-Q100 standards. The device is supplied in Cut Tape (CT) packaging with 10,763 units currently in stock.

Alternative part numbers become necessary when Cut Tape packaging is unavailable or when design specifications require different voltage ratings, packaging formats, or manufacturer sources. Substitute parts maintain electrical compatibility while offering different packaging options or enhanced specifications.

Key Parameters

Parameter	Value
Diode Configuration	3 Independent
Voltage - DC Reverse (Vr) (Max)	200 V
Current - Average Rectified (Io) (per Diode)	200 mA (DC)
Voltage - Forward (Vf) (Max) @ If	1.25 V @ 200 mA
Reverse Recovery Time (trr)	50 ns
Current - Reverse Leakage @ Vr	100 nA @ 200 V
Operating Temperature - Junction (Max)	150°C
Package / Case	SC-74, SOT-457
Mounting Type	Surface Mount
Grade	Automotive
Qualification	AEC-Q100
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the BAS21VD,165 are classified into two categories based on electrical and mechanical compatibility:

Parametric Equivalents maintain identical electrical specifications across all critical parameters: 200 V reverse voltage, 200 mA average rectified current, 1.25 V forward voltage at 200 mA, 50 ns reverse recovery time, 100 nA reverse leakage current, and 150°C maximum junction temperature. These parts differ only in packaging format (Tape & Reel versus Cut Tape) and are direct functional replacements. Parametric equivalents include BAS21AVD,135, BAS21AVD,165, and BAS21VD,135.

Similar Parts maintain the same diode configuration, package type (SC-74, SOT-457), mounting method, and base product number but feature enhanced voltage specifications or different manufacturer sourcing. The BAS21TMR6T1G from onsemi operates at 250 V reverse voltage (50 V higher than the main part) and carries AEC-Q101 qualification instead of AEC-Q100, with operating temperature range of −55°C to 150°C. This part is suitable for applications requiring higher voltage margin or broader temperature operation.

Parameter Comparison

Parameter	BAS21VD,165 (Main)	BAS21AVD,135	BAS21AVD,165	BAS21VD,135	BAS21TMR6T1G
Manufacturer	Nexperia USA Inc.	Nexperia USA Inc.	Nexperia USA Inc.	Nexperia USA Inc.	onsemi
Diode Configuration	3 Independent	3 Independent	3 Independent	3 Independent	3 Independent
Voltage - DC Reverse (Vr) (Max)	200 V	200 V	200 V	200 V	250 V
Current - Average Rectified (Io)	200 mA (DC)	200 mA (DC)	200 mA (DC)	200 mA (DC)	200 mA (DC)
Voltage - Forward (Vf) (Max) @ If	1.25 V @ 200 mA	1.25 V @ 200 mA	1.25 V @ 200 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
Current - Reverse Leakage @ Vr	100 nA @ 200 V	100 nA @ 200 V	100 nA @ 200 V	100 nA @ 200 V	1 µA @ 200 V
Operating Temperature - Junction	150°C (Max)	150°C (Max)	150°C (Max)	150°C (Max)	−55°C ~ 150°C
Package / Case	SC-74, SOT-457	SC-74, SOT-457	SC-74, SOT-457	SC-74, SOT-457	SC-74, SOT-457
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Packaging Format	Cut Tape (CT)	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)
Grade	Automotive	Automotive	Automotive	Automotive	Automotive
Qualification	AEC-Q100	AEC-Q100	AEC-Q100	AEC-Q100	AEC-Q101
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Inventory (Pcs)	10,763	7,723	26,398	58,413	15,100

Engineering Selection Recommendations

For Direct Electrical Replacement (Parametric Equivalents):

BAS21AVD,135, BAS21AVD,165, and BAS21VD,135 are parametric equivalents to the BAS21VD,165. All three parts maintain identical electrical specifications and automotive-grade AEC-Q100 qualification. Selection among these equivalents is determined by packaging requirements and inventory availability. BAS21AVD,165 offers the highest inventory level (26,398 units) in Tape & Reel format. BAS21VD,135 provides the largest inventory (58,413 units) also in Tape & Reel format. These parts are suitable for high-volume production environments where Tape & Reel packaging is standard.

For Enhanced Voltage Margin Applications:

The BAS21TMR6T1G from onsemi is classified as a similar part due to its 250 V reverse voltage rating, which exceeds the main part by 50 V. This part carries AEC-Q101 qualification and provides extended operating temperature range (−55°C to 150°C). The BAS21TMR6T1G is appropriate for designs requiring higher voltage headroom or broader temperature operation. The reverse leakage current specification differs at 1 µA @ 200 V compared to 100 nA @ 200 V for the main part.

All substitute parts maintain ROHS3 compliance, MSL Level 1 (Unlimited), and identical package geometry (SC-74, SOT-457) for direct PCB compatibility.

Frequently Asked Questions (FAQ)

Q: Can BAS21AVD,135 be used as a direct replacement for BAS21VD,165?

A: Yes. BAS21AVD,135 is a parametric equivalent with identical electrical specifications: 200 V reverse voltage, 200 mA average rectified current, 1.25 V forward voltage at 200 mA, 50 ns reverse recovery time, and 100 nA reverse leakage current. The only difference is packaging format (Tape & Reel versus Cut Tape). Both parts carry AEC-Q100 qualification and are suitable for automotive applications.

Q: What is the difference between BAS21AVD,165 and BAS21VD,135?

A: Both parts are parametric equivalents with identical electrical specifications and AEC-Q100 qualification. The difference is manufacturer designation and inventory availability. BAS21AVD,165 has 26,398 units in stock, while BAS21VD,135 has 58,413 units. Both are supplied in Tape & Reel packaging.

Q: When should BAS21TMR6T1G be selected instead of the main part?

A: BAS21TMR6T1G should be selected when the application requires 250 V reverse voltage rating (50 V higher than BAS21VD,165), extended operating temperature range (−55°C to 150°C), or AEC-Q101 qualification. This part is from onsemi and maintains the same package type and diode configuration. The reverse leakage current is higher at 1 µA @ 200 V.

Q: Are all substitute parts compatible with the same PCB footprint?

A: Yes. All substitute parts use the SC-74 (SOT-457) package with identical pin configuration and physical dimensions. Direct PCB footprint compatibility is maintained across all listed parts.

Q: What packaging formats are available for BAS21 diode arrays?

A: The BAS21VD,165 is supplied in Cut Tape (CT) format. Parametric equivalents BAS21AVD,135, BAS21AVD,165, and BAS21VD,135 are supplied in Tape & Reel (TR) format. BAS21TMR6T1G is also supplied in Tape & Reel format. Selection depends on production volume and assembly line requirements.

Q: Do all parts meet automotive qualification standards?

A: Yes. BAS21VD,165, BAS21AVD,135, BAS21AVD,165, and BAS21VD,135 carry AEC-Q100 qualification. BAS21TMR6T1G carries AEC-Q101 qualification. Both qualifications are automotive-grade standards suitable for automotive applications.

Q: What is the significance of the reverse leakage current difference in BAS21TMR6T1G?

A: BAS21TMR6T1G specifies 1 µA @ 200 V reverse leakage current compared to 100 nA @ 200 V for the main part. This represents a 10-fold increase in leakage current. Applications sensitive to leakage current performance should account for this difference when selecting BAS21TMR6T1G.

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