BAV74LT3G Equivalent & Substitute Parts

Part Overview

The BAV74LT3G is a general-purpose diode array manufactured by onsemi, configured as 1 pair common cathode with 50 V reverse voltage rating and 200 mA average rectified current per diode. The device is packaged in SOT-23-3 (TO-236-3, SC-59) surface mount configuration.

The BAV74LT3G is classified as obsolete. Identification of equivalent and substitute parts is necessary to support ongoing design requirements, production continuity, and component sourcing for applications currently utilizing this part number.

Key Parameters

Parameter	Value	Unit
Diode Configuration	1 Pair Common Cathode	—
Voltage - DC Reverse (Vr) (Max)	50	V
Current - Average Rectified (Io) (per Diode)	200	mA (DC)
Voltage - Forward (Vf) (Max) @ If	1	V @ 100 mA
Reverse Recovery Time (trr)	4	ns
Current - Reverse Leakage @ Vr	100	nA @ 50 V
Operating Temperature - Junction	-55 to 150	°C
Mounting Type	Surface Mount	—
Package / Case	TO-236-3, SC-59, SOT-23-3	—
Technology	Standard	—
Speed Classification	Small Signal ≤ 200mA (Io), Any Speed	—

Substitute Part Grouping Explanation

Substitute parts for the BAV74LT3G are identified based on strict electrical and mechanical parameter compatibility within the diode array category. The substitution logic is organized into two categories:

Direct Substitutes (Electrical and Mechanical Equivalence): Parts that maintain identical or superior electrical specifications while preserving the same package configuration (SOT-23-3). These parts share the same diode configuration (1 pair common cathode), reverse voltage rating (50 V minimum), current rating (200 mA minimum per diode), and forward voltage characteristics. Direct substitutes must support the same operating temperature range and mounting type.

Similar Substitutes (Parameter Compatibility with Derating Considerations): Parts that differ in one or more electrical parameters but remain functionally compatible within defined application boundaries. These parts maintain the same package and diode configuration but may have higher reverse voltage ratings, different current ratings, or alternative technology types (Schottky vs. Standard). Selection of similar substitutes requires verification that the application can accommodate parameter differences without performance degradation.

Key Parameters Determining Substitutability:

Diode configuration: 1 pair common cathode (mandatory)
Package type: SOT-23-3 / TO-236-3 / SC-59 (mandatory)
Reverse voltage rating: minimum 50 V
Average rectified current: minimum 200 mA per diode
Mounting type: Surface mount (mandatory)

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io (per Diode) [mA]	Vf (Max) @ If [V]	trr [ns]	Ir @ Vr [nA/µA]	Tj (Max) [°C]	Technology	Product Status
BAV74LT3G	onsemi	50	200	1 @ 100 mA	4	100 nA @ 50 V	150	Standard	Obsolete
BAV74LT1G	onsemi	50	200	1 @ 100 mA	4	100 nA @ 50 V	150	Standard	Active
BAV74,215	Nexperia USA Inc.	50	215	1 @ 100 mA	4	100 nA @ 50 V	150	Standard	Active
BAV74,235	Nexperia USA Inc.	50	215	1 @ 100 mA	4	100 nA @ 50 V	150	Standard	Active
BAS70-05FILM	STMicroelectronics	70	70	1 @ 15 mA	—	10 µA @ 70 V	150	Schottky	Active
BAV70-E3-08	Vishay General Semiconductor - Diodes Division	70	250	1.25 @ 150 mA	6	50 µA @ 70 V	150	Standard	Active
BAV70E6327HTSA1	Infineon Technologies	80	200	1.25 @ 150 mA	4	150 nA @ 70 V	150	Standard	Last Time Buy

Engineering Selection Recommendations

Direct Substitutes (Recommended Priority):

BAV74LT1G (onsemi) is the primary direct substitute for BAV74LT3G. This part maintains identical electrical specifications across all critical parameters: 50 V reverse voltage, 200 mA average rectified current per diode, 1 V forward voltage at 100 mA, 4 ns reverse recovery time, and 100 nA reverse leakage current at 50 V. The BAV74LT1G is classified as active product status with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1). Packaging is available in Cut Tape (CT) and Digi-Reel® formats.

BAV74,215 and BAV74,235 (Nexperia USA Inc.) are direct substitutes with enhanced current rating of 215 mA per diode, exceeding the 200 mA requirement of the BAV74LT3G. Both parts maintain 50 V reverse voltage, 1 V forward voltage at 100 mA, 4 ns reverse recovery time, and 100 nA reverse leakage current. Both are active products with ROHS3 compliance. Packaging is available in Tape & Reel (TR) format.

Similar Substitutes (Application-Dependent Selection):

BAV70-E3-08 (Vishay General Semiconductor - Diodes Division) provides higher reverse voltage rating (70 V) and enhanced current rating (250 mA per diode). Forward voltage is 1.25 V at 150 mA. This part is suitable for applications requiring higher voltage margin or increased current capacity. Product status is active with ROHS3 compliance.

BAV70E6327HTSA1 (Infineon Technologies) offers the highest reverse voltage rating (80 V) with 200 mA current rating matching the BAV74LT3G. Forward voltage is 1.25 V at 150 mA. This part is classified as Last Time Buy status, indicating limited future availability. ROHS3 compliance is confirmed.

BAS70-05FILM (STMicroelectronics) employs Schottky technology with 70 V reverse voltage but reduced current rating of 70 mA per diode. This part is not suitable as a direct substitute due to insufficient current capacity. Selection of this part requires application redesign to accommodate lower current specifications.

Frequently Asked Questions (FAQ)

Q: Can BAV74LT1G directly replace BAV74LT3G in existing designs?

A: Yes. BAV74LT1G is a direct electrical and mechanical equivalent. All critical parameters—reverse voltage (50 V), average rectified current (200 mA per diode), forward voltage (1 V @ 100 mA), reverse recovery time (4 ns), and reverse leakage current (100 nA @ 50 V)—are identical. Package configuration (SOT-23-3) and diode configuration (1 pair common cathode) are identical. The primary difference is product status: BAV74LT1G is active, while BAV74LT3G is obsolete.

Q: What is the difference between BAV74,215 and BAV74LT1G?

A: Both parts share identical reverse voltage (50 V), forward voltage (1 V @ 100 mA), reverse recovery time (4 ns), and reverse leakage current (100 nA @ 50 V). The BAV74,215 has a higher average rectified current rating of 215 mA per diode compared to 200 mA for BAV74LT1G. Both are manufactured to the same SOT-23-3 package standard. BAV74,215 is supplied by Nexperia USA Inc. in Tape & Reel format, while BAV74LT1G is supplied by onsemi in Cut Tape and Digi-Reel formats.

Q: Can BAV70-E3-08 be used as a substitute for BAV74LT3G?

A: BAV70-E3-08 is a similar substitute with compatibility constraints. The part maintains the same SOT-23-3 package and 1 pair common cathode configuration. However, reverse voltage is increased to 70 V, average rectified current is increased to 250 mA per diode, and forward voltage is increased to 1.25 V at 150 mA. Applications designed for 50 V operation can accommodate the higher voltage rating without modification. Applications with strict forward voltage specifications must verify that 1.25 V forward voltage is acceptable.

Q: Why is BAS70-05FILM not recommended as a substitute?

A: BAS70-05FILM employs Schottky diode technology with a maximum average rectified current of 70 mA per diode. The BAV74LT3G requires 200 mA per diode. BAS70-05FILM cannot support the current requirements of applications designed for BAV74LT3G without significant circuit redesign. Additionally, Schottky technology exhibits different forward voltage and reverse leakage characteristics compared to standard diode technology used in BAV74LT3G.

Q: What is the significance of "Last Time Buy" status for BAV70E6327HTSA1?

A: Last Time Buy status indicates that the manufacturer has announced end-of-life for this part number. Existing inventory may be available for a limited period, but future production is not planned. While BAV70E6327HTSA1 is electrically compatible with BAV74LT3G (50 V reverse voltage, 200 mA current rating, 4 ns reverse recovery time), selection of this part for new designs is not recommended due to supply discontinuation risk. BAV74LT1G or BAV74,215 are preferred alternatives with confirmed active product status.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed in this reference—BAV74LT1G, BAV74,215, BAV74,235, BAS70-05FILM, BAV70-E3-08, and BAV70E6327HTSA1—are confirmed ROHS3 compliant. All parts have REACH Unaffected status and are classified under ECCN EAR99 and HTSUS 8541.10.0070.

Q: What packaging formats are available for substitute parts?

A: BAV74LT1G is available in Cut Tape (CT) and Digi-Reel® formats. BAV74,215 and BAV74,235 are available in Tape & Reel (TR) format. BAV70-E3-08 is available in Cut Tape (CT) and Digi-Reel® formats. BAV70E6327HTSA1 is available in Cut Tape (CT) format. BAS70-05FILM is available in Cut Tape (CT) and Digi-Reel® formats. Packaging selection should align with production equipment and inventory management requirements.

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