BAS31-D87Z Equivalent & Substitute Parts

Part Overview

The BAS31-D87Z is a general-purpose diode array manufactured by onsemi, configured as 1 pair series connection in a surface mount SOT-23-3 package. This component is rated for 120 V DC reverse voltage and 200 mA average rectified current per diode, with a maximum forward voltage of 1 V at 200 mA. The part is currently active in production and RoHS3 compliant. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and application requirements where alternative electrical or mechanical specifications are acceptable within design parameters.

Key Parameters

Parameter	Value
Diode Configuration	1 Pair Series Connection
Voltage - DC Reverse (Vr) (Max)	120 V
Current - Average Rectified (Io) (per Diode)	200 mA
Voltage - Forward (Vf) (Max) @ If	1 V @ 200 mA
Reverse Recovery Time (trr)	50 ns
Current - Reverse Leakage @ Vr	100 nA @ 90 V
Operating Temperature - Junction (Max)	150°C
Package / Case	TO-236-3, SC-59, SOT-23-3
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the BAS31-D87Z is determined by the following critical parameters: diode configuration (1 pair series connection), package type (SOT-23-3), mounting method (surface mount), forward voltage characteristics (1 V @ 200 mA), reverse recovery time (50 ns), and reverse leakage current (100 nA @ 90 V).

The substitute parts identified maintain identical diode configuration, package, and mounting specifications. However, substitute parts may differ in maximum reverse voltage rating (Vr), average rectified current capacity (Io), technology type (standard versus avalanche), and operating temperature range. These differences establish substitution categories:

Category 1 (Reduced Voltage Rating): BAS31 by Diotec Semiconductor operates at 90 V maximum reverse voltage versus the 120 V rating of the main part. This substitute is suitable for applications where the circuit voltage does not exceed 90 V.

Category 2 (Enhanced Current & Automotive Grade): BAS31,215 and BAS31,235 by Nexperia USA Inc. feature 90 V reverse voltage, 250 mA average rectified current, avalanche technology, and AEC-Q100 automotive qualification. These substitutes provide higher current capacity and automotive-grade reliability for applications requiring enhanced performance specifications.

Parameter Comparison

Parameter	BAS31-D87Z (onsemi)	BAS31 (Diotec)	BAS31,215 (Nexperia)	BAS31,235 (Nexperia)
Manufacturer	onsemi	Diotec Semiconductor	Nexperia USA Inc.	Nexperia USA Inc.
Diode Configuration	1 Pair Series Connection	1 Pair Series Connection	1 Pair Series Connection	1 Pair Series Connection
Voltage - DC Reverse (Vr) (Max)	120 V	90 V	90 V	90 V
Current - Average Rectified (Io) (per Diode)	200 mA	200 mA	250 mA (DC)	250 mA (DC)
Voltage - Forward (Vf) (Max) @ If	1 V @ 200 mA	1 V @ 200 mA	1 V @ 200 mA	1 V @ 200 mA
Reverse Recovery Time (trr)	50 ns	50 ns	50 ns	50 ns
Current - Reverse Leakage @ Vr	100 nA @ 90 V	100 nA @ 90 V	100 nA @ 90 V	100 nA @ 90 V
Operating Temperature - Junction (Max)	150°C	150°C	150°C	150°C
Package / Case	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Technology	Standard	Standard	Avalanche	Avalanche
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Automotive Grade	Not specified	Not specified	AEC-Q100	AEC-Q100

Engineering Selection Recommendations

BAS31-D87Z (onsemi) - Primary Part

The BAS31-D87Z is the specified component for applications requiring 120 V reverse voltage rating with 200 mA average rectified current. This part is active in production, RoHS3 compliant, and available in high volume (10,400 pcs in stock). Use this part when the circuit design specifies 120 V reverse voltage protection.

BAS31 (Diotec Semiconductor) - Voltage-Reduced Substitute

The BAS31 by Diotec is suitable for applications where the maximum circuit voltage does not exceed 90 V. This substitute maintains identical current rating (200 mA), forward voltage characteristics, and reverse recovery time. The part is active in production, RoHS3 compliant, and available in high volume (17,147 pcs in stock). Selection of this substitute requires circuit voltage verification to confirm 90 V maximum reverse voltage is sufficient.

BAS31,215 (Nexperia USA Inc.) - Enhanced Performance Substitute

The BAS31,215 is suitable for applications requiring higher current capacity (250 mA versus 200 mA) and automotive-grade reliability. This part features avalanche technology, AEC-Q100 qualification, and operates at 90 V reverse voltage. The part is active in production, RoHS3 compliant, and available in high volume (48,400 pcs in stock). Selection of this substitute requires circuit voltage verification to confirm 90 V maximum reverse voltage is sufficient and that the application benefits from automotive-grade qualification.

BAS31,235 (Nexperia USA Inc.) - Enhanced Performance Substitute (Tape & Reel)

The BAS31,235 is functionally equivalent to BAS31,215 with identical electrical specifications: 90 V reverse voltage, 250 mA average rectified current, avalanche technology, and AEC-Q100 automotive qualification. This part differs only in packaging format (Tape & Reel versus Cut Tape & Digi-Reel). The part is active in production, RoHS3 compliant, and available in high volume (14,709 pcs in stock). Selection of this substitute requires circuit voltage verification and packaging compatibility with manufacturing processes.

Frequently Asked Questions (FAQ)

Q: Can BAS31 (Diotec) be used as a direct replacement for BAS31-D87Z?

A: BAS31 by Diotec is electrically compatible for applications where the maximum circuit voltage does not exceed 90 V. The 120 V reverse voltage rating of the BAS31-D87Z cannot be matched by the 90 V-rated BAS31. Verify circuit voltage specifications before substitution.

Q: What is the difference between BAS31,215 and BAS31,235?

A: BAS31,215 and BAS31,235 are electrically identical. Both feature 90 V reverse voltage, 250 mA average rectified current, avalanche technology, and AEC-Q100 automotive qualification. The difference is packaging format: BAS31,215 is supplied in Cut Tape & Digi-Reel format, while BAS31,235 is supplied in Tape & Reel format. Selection depends on manufacturing equipment compatibility.

Q: Why do the Nexperia substitutes have higher current ratings (250 mA versus 200 mA)?

A: BAS31,215 and BAS31,235 employ avalanche technology, which provides enhanced current handling capability compared to the standard technology used in BAS31-D87Z and BAS31 (Diotec). The higher current rating reflects this technology difference and does not affect substitution compatibility for applications designed for 200 mA operation.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. BAS31 (Diotec), BAS31,215 (Nexperia), and BAS31,235 (Nexperia) are all RoHS3 compliant, matching the compliance status of the BAS31-D87Z.

Q: What is the significance of AEC-Q100 qualification on the Nexperia parts?

A: AEC-Q100 qualification indicates the part meets automotive industry reliability and quality standards. BAS31,215 and BAS31,235 carry this qualification, making them suitable for automotive applications. The BAS31-D87Z and BAS31 (Diotec) do not specify automotive qualification.

Q: Can BAS31-D87Z be substituted in an application originally designed for BAS31,215?

A: Yes. The BAS31-D87Z provides higher reverse voltage rating (120 V versus 90 V) and is compatible with applications designed for BAS31,215. However, the BAS31-D87Z does not carry AEC-Q100 automotive qualification, which may be a requirement for automotive applications.

Q: Are there any temperature operating range differences between the substitutes?

A: BAS31 (Diotec) specifies an operating temperature range of -55°C to 150°C. BAS31-D87Z, BAS31,215, and BAS31,235 specify a maximum junction temperature of 150°C without explicit minimum temperature specification. Verify application temperature requirements before substitution.

Q: Do all parts use the same SOT-23-3 package?

A: Yes. All parts (BAS31-D87Z, BAS31, BAS31,215, and BAS31,235) use the TO-236-3, SC-59, SOT-23-3 surface mount package. Mechanical compatibility is maintained across all substitutes.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message