BAV70 Equivalent & Substitute Parts

Part Overview

The BAV70 is a general-purpose diode array featuring one pair of common cathode diodes in a surface mount SOT-23-3 package. The onsemi BAV70 is classified as obsolete, with 1,595,100 pieces in stock. The device is rated for 70 V DC reverse voltage and 200 mA average rectified current per diode, making it suitable for small-signal switching and rectification applications in consumer and industrial electronics.

Due to the obsolete status of the original onsemi BAV70, equivalent and substitute parts from active manufacturers are necessary to ensure design continuity and long-term component availability. Substitute parts maintain the same diode configuration, package type, and core electrical characteristics while offering improved product status, compliance certifications, and operational temperature ranges.

Key Parameters

Parameter	Value	Unit
Diode Configuration	1 Pair Common Cathode	—
Voltage - DC Reverse (Vr) (Max)	70	V
Current - Average Rectified (Io) (per Diode)	200	mA
Voltage - Forward (Vf) (Max) @ If	1.25 @ 150	V @ mA
Reverse Recovery Time (trr)	6	ns
Current - Reverse Leakage @ Vr	5	µA @ 70 V
Operating Temperature - Junction (Max)	150	°C
Mounting Type	Surface Mount	—
Package / Case	TO-236-3, SC-59, SOT-23-3	—
Technology	Standard	—

Substitute Part Grouping Explanation

Substitute parts for the BAV70 are grouped into three categories based on electrical and mechanical compatibility:

Direct Manufacturer Substitutes (onsemi): Parts BAV70LT1G and BAV70LT3G maintain identical diode configuration, package type (SOT-23-3), and core current rating (200 mA). These parts feature increased reverse voltage rating (100 V) and improved reverse leakage characteristics (2.5 µA @ 70 V). Both are active products with RoHS3 compliance and extended operating temperature ranges (-55°C to 150°C).

Parametric Equivalents (Same Voltage & Current Rating): Parts ACDST-70-G (Comchip Technology) and BAV70 RFG (Taiwan Semiconductor Corporation) match the original BAV70 specifications exactly: 70 V reverse voltage, 200 mA current rating, SOT-23-3 package, and 6 ns reverse recovery time. Both are active products with RoHS3 compliance. ACDST-70-G includes AEC-Q101 automotive qualification.

Similar Substitutes (Voltage or Current Variations): Parts from Diodes Incorporated (BAV70, BAV70-7-F), Vishay (BAV70-E3-08), Micro Commercial Co (BAV70-TP), Infineon (BAV70E6327HTSA1), and Panjit (BAV70_R1_00001) offer variations in reverse voltage (75–80 V), current rating (150–300 mA), or reverse recovery time (4 ns). These parts maintain SOT-23-3 package compatibility and common cathode configuration but require circuit-level verification for voltage and current derating.

Substitution logic is based on the following key parameters: diode configuration (1 pair common cathode), package type (SOT-23-3), reverse voltage rating (minimum 70 V), current rating (minimum 200 mA), and forward voltage drop (1.25 V @ 150 mA).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io (per Diode) [mA]	Vf (Max) @ If [V @ mA]	trr [ns]	Ir @ Vr [µA]	Tj (Max) [°C]	Product Status	Package
BAV70	onsemi	70	200	1.25 @ 150	6	5 @ 70	150	Obsolete	SOT-23-3
BAV70LT1G	onsemi	100	200	1.25 @ 150	6	2.5 @ 70	150	Active	SOT-23-3
BAV70LT3G	onsemi	100	200	1.25 @ 150	6	2.5 @ 70	150	Active	SOT-23-3
BAV70	Diodes Incorporated	75	300	1.25 @ 150	4	50 @ 75	150	Last Time Buy	SOT-323
BAV70-7-F	Diodes Incorporated	75	150	1.25 @ 150	4	2.5 @ 75	150	Active	SOT-23-3
BAV70-E3-08	Vishay General Semiconductor	70	250	1.25 @ 150	6	50 @ 70	150	Active	SOT-23-3
BAV70-TP	Micro Commercial Co	75	150	0.855 @ 10	4	2.5 @ 75	150	Active	SOT-23-3
BAV70E6327HTSA1	Infineon Technologies	80	200	1.25 @ 150	4	0.15 @ 70	150	Last Time Buy	SOT-23-3
BAV70_R1_00001	Panjit International Inc.	75	150	1.25 @ 150	4	2.5 @ 75	150	Active	SOT-23-3
ACDST-70-G	Comchip Technology	70	200	1.25 @ 150	6	2.5 @ 70	150	Active	SOT-23-3
BAV70 RFG	Taiwan Semiconductor Corporation	70	200	1.25 @ 150	6	2.5 @ 70	150	Active	SOT-23-3

Engineering Selection Recommendations

For Direct Replacement (No Circuit Modification Required):

BAV70LT1G and BAV70LT3G from onsemi are the preferred direct substitutes. Both maintain the original 200 mA current rating and SOT-23-3 package footprint. The increased reverse voltage rating (100 V vs. 70 V) provides additional design margin without affecting circuit operation. Both parts are active products with RoHS3 compliance and extended operating temperature ranges (-55°C to 150°C), ensuring long-term availability and environmental compliance.

ACDST-70-G (Comchip Technology) and BAV70 RFG (Taiwan Semiconductor Corporation) provide parametric equivalence to the original BAV70, matching all electrical specifications exactly: 70 V reverse voltage, 200 mA current, and 6 ns reverse recovery time. Both are active products with RoHS3 compliance. ACDST-70-G includes AEC-Q101 automotive qualification, making it suitable for automotive applications.

For Applications Requiring Higher Current Capacity:

BAV70-E3-08 (Vishay) supports 250 mA per diode while maintaining the 70 V reverse voltage and SOT-23-3 package. This part is active and RoHS3 compliant, suitable for applications requiring increased current headroom.

For Applications with Higher Voltage Tolerance:

BAV70LT1G and BAV70LT3G (onsemi) rated at 100 V, or BAV70E6327HTSA1 (Infineon) rated at 80 V, accommodate circuits with higher voltage transients or design margins. BAV70E6327HTSA1 offers superior reverse leakage characteristics (150 nA @ 70 V) but is classified as Last Time Buy.

For Cost-Optimized Designs:

BAV70-7-F (Diodes Incorporated), BAV70-TP (Micro Commercial Co), and BAV70_R1_00001 (Panjit) are active products with reduced current ratings (150 mA) and slightly elevated reverse voltage (75 V). These parts are suitable for applications where the full 200 mA rating is not required.

Avoid:

Diodes Incorporated BAV70 (SOT-323 package) is classified as Last Time Buy and uses a different package (SOT-323 vs. SOT-23-3), requiring PCB layout modification. BAV70E6327HTSA1 (Infineon) is also Last Time Buy status.

Frequently Asked Questions (FAQ)

Q: Can BAV70LT1G or BAV70LT3G be used as direct replacements for the obsolete onsemi BAV70?

A: Yes. Both parts maintain identical diode configuration (1 pair common cathode), package type (SOT-23-3), current rating (200 mA), and forward voltage characteristics (1.25 V @ 150 mA). The increased reverse voltage rating (100 V vs. 70 V) is a design improvement that does not affect circuit compatibility. Both are active products with RoHS3 compliance and extended temperature ranges.

Q: What is the difference between BAV70LT1G and BAV70LT3G?

A: Both parts are electrically identical with the same specifications: 100 V reverse voltage, 200 mA current, 1.25 V forward voltage, and 6 ns reverse recovery time. The difference is in packaging format: BAV70LT1G is supplied in Cut Tape (CT) & Digi-Reel format, while BAV70LT3G is also supplied in Cut Tape & Digi-Reel format. Selection depends on procurement and assembly requirements.

Q: Can I use ACDST-70-G or BAV70 RFG as substitutes?

A: Yes. Both parts provide parametric equivalence to the original BAV70 with identical electrical specifications: 70 V reverse voltage, 200 mA current, 1.25 V forward voltage, and 6 ns reverse recovery time. Both are active products with RoHS3 compliance. ACDST-70-G includes AEC-Q101 automotive qualification. No circuit modification is required.

Q: Why do some substitute parts have different reverse voltage ratings (75 V, 80 V, 100 V)?

A: Higher reverse voltage ratings provide additional design margin and protection against voltage transients without affecting circuit operation in applications designed for 70 V. Parts with higher voltage ratings are suitable for designs requiring increased robustness. Parts with lower current ratings (150 mA vs. 200 mA) are suitable only for applications where the full 200 mA rating is not required.

Q: Is the Diodes Incorporated BAV70 in SOT-323 package compatible?

A: No. Although electrically similar (75 V, 300 mA), the SOT-323 package is physically different from the original SOT-23-3 package. This requires PCB layout modification and is not recommended for direct replacement. Additionally, this part is classified as Last Time Buy.

Q: What is the significance of the reverse leakage current (Ir) differences between substitute parts?

A: Reverse leakage current affects power dissipation and circuit performance at high temperatures or high reverse voltages. Lower reverse leakage (2.5 µA or 150 nA) indicates better device quality and lower standby power consumption. The original BAV70 specifies 5 µA @ 70 V; most active substitutes offer 2.5 µA, representing an improvement.

Q: Can BAV70-E3-08 (250 mA) be used in place of the 200 mA BAV70?

A: Yes. BAV70-E3-08 maintains the same 70 V reverse voltage and SOT-23-3 package while supporting higher current (250 mA). This part is suitable for applications requiring increased current capacity or design margin. No circuit modification is required.

Q: Are all substitute parts RoHS3 compliant?

A: All active substitute parts listed (BAV70LT1G, BAV70LT3G, BAV70-7-F, BAV70-E3-08, BAV70-TP, BAV70_R1_00001, ACDST-70-G, BAV70 RFG) are RoHS3 compliant. Last Time Buy parts (Diodes Incorporated BAV70 in SOT-323, BAV70E6327HTSA1) are also RoHS3 compliant but have limited availability.

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

A: Small Signal (≤200 mA, any speed) indicates the device is optimized for low-current switching applications with no specific recovery time requirement. Fast Recovery (≤500 ns, >200 mA) indicates optimized performance for higher-current applications with controlled reverse recovery time. The original BAV70 is classified as Small Signal. Substitutes with Fast Recovery classification (4 ns trr) offer improved switching performance but are not required for Small Signal applications.

Q: Which substitute offers the best long-term availability?

A: BAV70LT1G and BAV70LT3G (onsemi), ACDST-70-G (Comchip), BAV70 RFG (Taiwan Semiconductor), BAV70-7-F (Diodes Incorporated), BAV70-E3-08 (Vishay), BAV70-TP (Micro Commercial Co), and BAV70_R1_00001 (Panjit) are all classified as Active products, ensuring continued availability. Avoid Last Time Buy parts (Diodes Incorporated BAV70 SOT-323, BAV70E6327HTSA1 Infineon) for new designs.

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