BAV99-D87Z Equivalent & Substitute Parts

Part Overview

The BAV99-D87Z is a general-purpose diode array manufactured by onsemi, configured as 1 pair series connection in a SOT-23-3 surface mount package. This component is rated for 70 V DC reverse voltage and 200 mA average rectified current per diode. The part is classified as obsolete, necessitating identification of active equivalent and substitute components for new designs and ongoing production requirements. Substitute parts must maintain functional compatibility through equivalent electrical ratings and identical or superior mechanical packaging specifications.

Key Parameters

Parameter	BAV99-D87Z
Manufacturer	onsemi
Diode Configuration	1 Pair Series Connection
Voltage - DC Reverse (Vr) (Max)	70 V
Current - Average Rectified (Io) (per Diode)	200 mA
Voltage - Forward (Vf) (Max) @ If	1.25 V @ 150 mA
Reverse Recovery Time (trr)	6 ns
Current - Reverse Leakage @ Vr	2.5 µA @ 70 V
Operating Temperature - Junction	-55°C ~ 150°C
Package / Case	TO-236-3, SC-59, SOT-23-3
Mounting Type	Surface Mount
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the BAV99-D87Z are grouped based on the following substitution criteria:

Direct Electrical Equivalents (Same Voltage and Current Ratings): Parts maintaining the 70 V reverse voltage and 200 mA current specifications with identical SOT-23-3 packaging are classified as direct substitutes. These components preserve the original electrical performance envelope without design modification.

Enhanced Voltage Rating Substitutes (Higher Vr, Same or Higher Io): Parts rated for 100 V reverse voltage with 215 mA current capability provide superior voltage margin while maintaining or exceeding current capacity. These substitutes are suitable for applications where the original 70 V rating provides insufficient design margin.

Voltage-Matched Substitutes with Improved Current (Same Vr, Higher Io): Parts maintaining the 70 V reverse voltage rating while offering increased current capacity (215 mA) accommodate higher current demands within the same voltage class.

Alternative Package Substitutes (Different Form Factor): The BAV99T-TP variant uses SOT-523 packaging instead of SOT-23-3, representing a different mechanical footprint suitable for space-constrained applications with reduced current requirements (75 mA).

Manufacturer Variants (Different Suppliers, Equivalent Specifications): Parts from alternative manufacturers (Micro Commercial Co, Infineon Technologies, Diodes Incorporated) with matching or superior electrical specifications and active product status provide supply chain alternatives.

Key parameters determining substitution eligibility:

Diode Configuration: 1 Pair Series Connection (mandatory)
Voltage - DC Reverse (Vr): ≥ 70 V
Current - Average Rectified (Io): ≥ 200 mA
Package / Case: TO-236-3, SC-59, SOT-23-3 (or alternative if application permits)
Mounting Type: Surface Mount

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io (per Diode)	Vf (Max) @ If	trr	Package	Product Status
BAV99-D87Z	onsemi	70 V	200 mA	1.25 V @ 150 mA	6 ns	SOT-23-3	Obsolete
BAV99LT3G	onsemi	100 V	215 mA (DC)	1.25 V @ 150 mA	6 ns	SOT-23-3	Active
BAV199LT1G	onsemi	70 V	215 mA (DC)	1.25 V @ 150 mA	3 µs	SOT-23-3	Active
BAV99LT1G	onsemi	100 V	215 mA (DC)	1.25 V @ 150 mA	6 ns	SOT-23-3	Active
BAV99-TP	Micro Commercial Co	70 V	200 mA	1.25 V @ 150 mA	6 ns	SOT-23-3	Active
BAV99-TP-HF	Micro Commercial Co	100 V	200 mA	1.25 V @ 150 mA	4 ns	SOT-23-3	Active
BAV99T-TP	Micro Commercial Co	85 V	75 mA (DC)	1 V @ 50 mA	4 ns	SOT-523	Active
BAV199E6327HTSA1	Infineon Technologies	80 V	200 mA (DC)	1.25 V @ 150 mA	1.5 µs	SOT-23-3	Last Time Buy
BAV199E6433HTMA1	Infineon Technologies	80 V	200 mA (DC)	1.25 V @ 150 mA	1.5 µs	SOT-23-3	Last Time Buy
BAV199Q-13-F	Diodes Incorporated	85 V	140 mA (DC)	1.1 V @ 50 mA	3 µs	SOT-23-3	Active
BAV199Q-7-F	Diodes Incorporated	85 V	140 mA (DC)	1.1 V @ 50 mA	3 µs	SOT-23-3	Active

Engineering Selection Recommendations

Primary Substitute (Direct Replacement): BAV99-TP (Micro Commercial Co) is the recommended direct substitute for BAV99-D87Z. This part maintains identical electrical specifications (70 V, 200 mA) and SOT-23-3 packaging with active product status and RoHS3 compliance. No circuit modification is required for this substitution.

Secondary Substitute (Enhanced Voltage Rating): BAV99LT3G (onsemi) or BAV99LT1G (onsemi) provide enhanced voltage ratings (100 V) with increased current capacity (215 mA) while maintaining SOT-23-3 packaging and active product status. These substitutes are suitable for applications requiring additional voltage margin. Both parts carry RoHS3 compliance.

Alternative Voltage Class Substitutes: BAV199E6327HTSA1 and BAV199E6433HTMA1 (Infineon Technologies) offer 80 V ratings with 200 mA current in SOT-23-3 packaging. These parts carry Last Time Buy status, limiting their suitability for new long-term production programs.

Current-Limited Applications: BAV199Q-7-F and BAV199Q-13-F (Diodes Incorporated) provide 85 V ratings with 140 mA current capacity. These automotive-grade parts (AEC-Q101 qualified) are suitable for applications with reduced current requirements and automotive qualification requirements.

Space-Constrained Applications: BAV99T-TP (Micro Commercial Co) uses SOT-523 packaging for applications requiring reduced footprint. This part is limited to 75 mA current and 85 V voltage, suitable only for low-current signal applications.

Compliance Considerations: All recommended active substitutes carry RoHS3 compliance and REACH Unaffected status, matching the original part's regulatory profile. Parts with Last Time Buy status should be avoided for new production programs requiring long-term component availability.

Frequently Asked Questions (FAQ)

Q: Can BAV99LT3G replace BAV99-D87Z in all applications? A: BAV99LT3G is electrically compatible with BAV99-D87Z. The higher voltage rating (100 V vs. 70 V) and increased current capacity (215 mA vs. 200 mA) provide enhanced performance margins. No circuit modification is required. Both parts use identical SOT-23-3 packaging.

Q: What is the difference between BAV99-TP and BAV99LT3G? A: BAV99-TP maintains the original 70 V / 200 mA specifications with active status, providing a direct replacement. BAV99LT3G offers enhanced 100 V / 215 mA ratings for applications requiring higher voltage or current capacity. Both use SOT-23-3 packaging and are manufactured by different suppliers.

Q: Why are BAV199E6327HTSA1 and BAV199E6433HTMA1 marked as Last Time Buy? A: These Infineon parts carry Last Time Buy status, indicating discontinued production with limited remaining inventory. While electrically compatible (80 V / 200 mA), they are unsuitable for new production programs requiring long-term component availability. Active alternatives from onsemi or Micro Commercial Co are preferred.

Q: Is BAV99T-TP a suitable substitute for BAV99-D87Z? A: BAV99T-TP is not recommended as a general substitute. While it maintains 85 V voltage rating, its 75 mA current capacity is significantly lower than the original 200 mA specification. The SOT-523 package differs from SOT-23-3. This part is suitable only for low-current signal applications with space constraints.

Q: What does RoHS3 compliance mean for component selection? A: RoHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead and other hazardous materials. All recommended active substitutes carry RoHS3 compliance, matching the regulatory profile of the original BAV99-D87Z.

Q: Can I use BAV199Q-7-F in automotive applications? A: BAV199Q-7-F carries automotive qualification (AEC-Q101) and is suitable for automotive applications. However, its 140 mA current rating is lower than the original 200 mA specification. Verify that the application current requirements do not exceed 140 mA before selection.

Q: What is the significance of reverse recovery time (trr) differences between substitutes? A: Reverse recovery time affects switching speed and switching losses. The original BAV99-D87Z specifies 6 ns. Substitutes with faster recovery times (4 ns for BAV99-TP-HF) reduce switching losses, while slower recovery times (3 µs for BAV199LT1G) may increase switching losses. Select based on application switching frequency requirements.

Q: Are all substitute parts available in the same packaging options? A: Most recommended substitutes use SOT-23-3 packaging matching the original part. BAV99T-TP uses SOT-523 packaging, requiring PCB layout modification. Verify packaging compatibility with your PCB design before final selection.

Q: What inventory considerations apply to substitute selection? A: BAV99LT1G (onsemi) offers the highest inventory availability (1,004,400 pcs), followed by BAV199LT1G (605,300 pcs). BAV99-TP-HF (Micro Commercial Co) has limited inventory (664 pcs). For high-volume production, prioritize parts with substantial available inventory.

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