BAV74LT1 Equivalent & Substitute Parts

Part Overview

The BAV74LT1 is a general-purpose diode array featuring one pair of common cathode configuration rated for 50 V DC reverse voltage and 200 mA average rectified current per diode. This component is packaged in a surface mount TO-236-3 (SOT-23-3) package and is classified as obsolete. The BAV74LT1 is no longer in active production, necessitating identification of equivalent and substitute parts for ongoing design requirements and component procurement.

Key Parameters

Parameter	Value
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°C ~ 150°C
Mounting Type	Surface Mount
Package / Case	TO-236-3, SC-59, SOT-23-3
Technology	Standard

Substitute Part Grouping Explanation

Substitution of the BAV74LT1 is determined by the following critical parameters:

Mandatory Compatibility Criteria:

Diode configuration must be 1 Pair Common Cathode
Package must be TO-236-3, SC-59, or SOT-23-3 (surface mount)
Voltage - DC Reverse (Vr) must be equal to or greater than 50 V
Current - Average Rectified (Io) must be equal to or greater than 200 mA per diode
Mounting type must be Surface Mount

Acceptable Variation Parameters:

Voltage - Forward (Vf) may vary within application tolerance
Reverse Recovery Time (trr) may vary for different speed classifications
Current - Reverse Leakage may vary within acceptable limits
Operating temperature maximum may vary
Technology type (Standard or Schottky) may differ based on application requirements

Substitute parts are grouped into two categories: direct equivalents (identical electrical specifications with active product status) and functional alternatives (enhanced or modified specifications suitable for the same application space).

Parameter Comparison

Parameter	BAV74LT1	BAV74LT1G	BAS70-05FILM	BAV70-E3-08	BAV70E6327HTSA1
Manufacturer	onsemi	onsemi	STMicroelectronics	Vishay General Semiconductor - Diodes Division	Infineon Technologies
Product Status	Obsolete	Active	Active	Active	Last Time Buy
Diode Configuration	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode
Voltage - DC Reverse (Vr) (Max)	50 V	50 V	70 V	70 V	80 V
Current - Average Rectified (Io) (per Diode)	200 mA (DC)	200 mA (DC)	70 mA (DC)	250 mA (DC)	200 mA (DC)
Voltage - Forward (Vf) (Max) @ If	1 V @ 100 mA	1 V @ 100 mA	1 V @ 15 mA	1.25 V @ 150 mA	1.25 V @ 150 mA
Technology	Standard	Standard	Schottky	Standard	Standard
Reverse Recovery Time (trr)	4 ns	4 ns	Not specified	6 ns	4 ns
Current - Reverse Leakage @ Vr	100 nA @ 50 V	100 nA @ 50 V	10 µA @ 70 V	50 µA @ 70 V	150 nA @ 70 V
Operating Temperature - Junction	-55°C ~ 150°C	-55°C ~ 150°C	150°C (Max)	150°C (Max)	150°C (Max)
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	TO-236-3, SC-59, SOT-23-3
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Direct Equivalent - Recommended Primary Substitute:

BAV74LT1G is the direct equivalent replacement for the obsolete BAV74LT1. This part maintains identical electrical specifications including 50 V reverse voltage rating, 200 mA average rectified current, 4 ns reverse recovery time, and -55°C to 150°C operating temperature range. The BAV74LT1G is manufactured by onsemi with Active product status and ROHS3 compliance, providing long-term availability and regulatory alignment. This part is available in Cut Tape and Digi-Reel packaging formats with 107,400 units in stock.

Functional Alternatives - Enhanced Specifications:

BAV70-E3-08 (Vishay) provides enhanced current rating of 250 mA per diode while maintaining the same 50 V minimum reverse voltage requirement through its 70 V rating. This part is suitable for applications requiring higher current capacity within the same package footprint. Product status is Active with ROHS3 compliance and 305,200 units in stock.

BAV70E6327HTSA1 (Infineon) offers the highest reverse voltage rating at 80 V with matching 200 mA current rating and 4 ns reverse recovery time. This part is classified as Last Time Buy with ROHS3 compliance and 2,967 units in stock. This option provides voltage margin for applications with elevated reverse voltage stress.

Not Recommended for Direct Substitution:

BAS70-05FILM (STMicroelectronics) utilizes Schottky technology with reduced current rating of 70 mA per diode, which does not meet the 200 mA requirement of the BAV74LT1. This part is suitable only for applications with lower current demands.

Frequently Asked Questions (FAQ)

Q: Can BAV74LT1G be used as a direct replacement for BAV74LT1?

A: Yes. BAV74LT1G is the direct equivalent with identical electrical specifications. Both parts feature 50 V reverse voltage, 200 mA average rectified current, 4 ns reverse recovery time, and -55°C to 150°C operating temperature range. The primary difference is product status: BAV74LT1G is Active while BAV74LT1 is Obsolete. BAV74LT1G is ROHS3 compliant, whereas BAV74LT1 is RoHS non-compliant.

Q: What is the difference between BAV70-E3-08 and BAV74LT1?

A: BAV70-E3-08 has a higher reverse voltage rating (70 V versus 50 V) and higher average rectified current (250 mA versus 200 mA). Both parts share the same SOT-23-3 package and common cathode configuration. BAV70-E3-08 has a slightly higher forward voltage (1.25 V @ 150 mA versus 1 V @ 100 mA) and faster recovery time (6 ns versus 4 ns). BAV70-E3-08 is suitable for applications requiring higher current capacity.

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

A: BAS70-05FILM has a maximum average rectified current of 70 mA per diode, which is insufficient for applications requiring the 200 mA rating of BAV74LT1. Additionally, BAS70-05FILM uses Schottky technology rather than standard diode technology, resulting in different forward voltage characteristics. This part is only suitable for low-current applications.

Q: Are all substitute parts available in the same package?

A: Yes. All substitute parts listed are available in TO-236-3, SC-59, or SOT-23-3 surface mount packages, ensuring mechanical and electrical compatibility with BAV74LT1 PCB layouts.

Q: What is the significance of product status when selecting a substitute?

A: Product status indicates availability and long-term supply reliability. Active status (BAV74LT1G, BAS70-05FILM, BAV70-E3-08) indicates ongoing production and extended availability. Last Time Buy status (BAV70E6327HTSA1) indicates limited future availability. Obsolete status (BAV74LT1) indicates discontinued production with no future supply.

Q: Are all substitute parts RoHS compliant?

A: All substitute parts listed are ROHS3 compliant. The original BAV74LT1 is RoHS non-compliant. For applications requiring RoHS compliance, BAV74LT1G, BAS70-05FILM, BAV70-E3-08, and BAV70E6327HTSA1 all meet ROHS3 requirements.

Q: Can BAV70E6327HTSA1 be used in place of BAV74LT1?

A: Yes, with consideration for the higher reverse voltage rating. BAV70E6327HTSA1 has an 80 V reverse voltage rating compared to BAV74LT1's 50 V rating, providing additional voltage margin. Both parts have identical 200 mA average rectified current and 4 ns reverse recovery time. The higher forward voltage (1.25 V @ 150 mA versus 1 V @ 100 mA) should be evaluated for power dissipation impact. BAV70E6327HTSA1 is classified as Last Time Buy, limiting future availability.

Q: What packaging options are available for substitute parts?

A: BAV74LT1G is available in Cut Tape (CT) and Digi-Reel packaging. BAS70-05FILM and BAV70-E3-08 are available in Cut Tape and Digi-Reel packaging. BAV70E6327HTSA1 is available in Cut Tape packaging. All parts are surface mount with identical SOT-23-3 package dimensions.

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