BAV70LT1 Equivalent & Substitute Parts

Part Overview

The BAV70LT1 is a general-purpose diode array featuring one pair of common cathode configuration rated for 70 V DC reverse voltage and 200 mA average rectified current per diode. Manufactured by onsemi in SOT-23-3 surface mount package, this component is classified as obsolete product status. Due to its obsolete designation, identifying equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for production and repair applications.

Key Parameters

Parameter	Value
Diode Configuration	1 Pair Common Cathode
Voltage - DC Reverse (Vr) (Max)	70 V
Current - Average Rectified (Io) (per Diode)	200 mA (DC)
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
Technology	Standard

Substitute Part Grouping Explanation

Substitution eligibility for the BAV70LT1 is determined by the following critical parameters: diode configuration (1 Pair Common Cathode), package type (SOT-23-3 surface mount), voltage rating (DC reverse voltage), current rating (average rectified current per diode), and technology type (Standard or Schottky). Substitute parts must maintain identical or superior electrical ratings while preserving mechanical compatibility with the original footprint.

The substitute parts are grouped into two categories:

Direct Equivalent (Voltage-Upgraded): BAV70LT1G maintains identical configuration, package, and forward voltage characteristics while providing increased reverse voltage rating (100 V vs. 70 V). This part is manufactured by onsemi with active product status and RoHS3 compliance.

Functional Alternatives (Same Voltage, Different Parameters): BAS70-05FILM and BAV70-E3-08 maintain the 70 V reverse voltage rating and SOT-23-3 package but differ in current rating, technology type, or leakage characteristics. These parts are suitable for applications where the original specifications can be met with alternative electrical characteristics.

Parameter Comparison

Parameter	BAV70LT1 (Main)	BAV70LT1G (Direct Equivalent)	BAS70-05FILM (Alternative)	BAV70-E3-08 (Alternative)
Manufacturer	onsemi	onsemi	STMicroelectronics	Vishay General Semiconductor
Product Status	Obsolete	Active	Active	Active
Diode Configuration	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode
Technology	Standard	Standard	Schottky	Standard
Voltage - DC Reverse (Vr) (Max)	70 V	100 V	70 V	70 V
Current - Average Rectified (Io) (per Diode)	200 mA (DC)	200 mA (DC)	70 mA (DC)	250 mA (DC)
Voltage - Forward (Vf) (Max) @ If	1.25 V @ 150 mA	1.25 V @ 150 mA	1 V @ 15 mA	1.25 V @ 150 mA
Reverse Recovery Time (trr)	6 ns	6 ns	Not specified	6 ns
Current - Reverse Leakage @ Vr	2.5 µA @ 70 V	2.5 µA @ 70 V	10 µA @ 70 V	50 µA @ 70 V
Operating Temperature - Junction	-55°C ~ 150°C	-55°C ~ 150°C	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
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	RoHS non-compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant

Engineering Selection Recommendations

BAV70LT1G is the primary recommended substitute for the obsolete BAV70LT1. This part is manufactured by the same supplier (onsemi), maintains identical electrical characteristics for voltage and current ratings, and carries active product status with RoHS3 compliance. The increased reverse voltage rating (100 V vs. 70 V) provides design margin without compromising performance in applications rated for 70 V operation. This part is suitable for direct replacement in all applications where the BAV70LT1 was originally specified.

BAV70-E3-08 (Vishay) is a functional alternative for applications where increased current capacity (250 mA vs. 200 mA) is beneficial. This part maintains the 70 V reverse voltage rating, identical forward voltage characteristics, and SOT-23-3 package compatibility. However, the reverse leakage current is elevated (50 µA @ 70 V vs. 2.5 µA @ 70 V), which may impact performance in low-leakage applications. This part carries active product status and RoHS3 compliance.

BAS70-05FILM (STMicroelectronics) is a functional alternative only for applications where current requirements do not exceed 70 mA per diode. This Schottky diode array offers lower forward voltage (1 V @ 15 mA vs. 1.25 V @ 150 mA), which reduces power dissipation in low-current circuits. The 70 V reverse voltage rating matches the original specification. This part is not suitable for applications requiring the full 200 mA current capacity of the BAV70LT1. This part carries active product status and RoHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can BAV70LT1G be used as a direct replacement for BAV70LT1?

A: Yes. BAV70LT1G is manufactured by onsemi and maintains identical diode configuration, package type (SOT-23-3), forward voltage characteristics, and current rating (200 mA). The increased reverse voltage rating (100 V vs. 70 V) is compatible with all applications designed for 70 V operation. This part has active product status and RoHS3 compliance, making it suitable for new designs and production applications.

Q: What are the limitations of BAS70-05FILM as a substitute?

A: BAS70-05FILM is a Schottky diode array with maximum current rating of 70 mA per diode, compared to 200 mA for the BAV70LT1. This part is suitable only for applications where current requirements do not exceed 70 mA. The lower forward voltage (1 V @ 15 mA) provides reduced power dissipation but is specified at a different current level than the original part. Applications requiring the full 200 mA current capacity must use BAV70LT1G or BAV70-E3-08.

Q: Is BAV70-E3-08 compatible with the original BAV70LT1 footprint?

A: Yes. BAV70-E3-08 uses the identical SOT-23-3 surface mount package and maintains the same pinout configuration (1 Pair Common Cathode). However, the reverse leakage current is significantly higher (50 µA @ 70 V vs. 2.5 µA @ 70 V). Applications sensitive to leakage current or operating at elevated temperatures should be evaluated for compatibility before substitution.

Q: What is the primary advantage of BAV70LT1G over the original BAV70LT1?

A: BAV70LT1G provides increased reverse voltage rating (100 V vs. 70 V) while maintaining all other electrical characteristics identical to the BAV70LT1. Additionally, BAV70LT1G carries active product status and RoHS3 compliance, whereas the BAV70LT1 is obsolete and RoHS non-compliant. This makes BAV70LT1G the preferred choice for new designs and production applications.

Q: Can these substitute parts be used interchangeably in all applications?

A: No. Substitution depends on specific application requirements. BAV70LT1G is suitable for all applications originally designed for BAV70LT1. BAV70-E3-08 is suitable for applications where increased current capacity (250 mA) is acceptable and elevated leakage current (50 µA) does not impact performance. BAS70-05FILM is suitable only for applications where current does not exceed 70 mA per diode. Circuit-level evaluation is required to confirm compatibility for each specific application.

Q: Are all substitute parts available in the same packaging options?

A: All substitute parts are available in SOT-23-3 surface mount package, which is mechanically compatible with the BAV70LT1. Packaging options (Cut Tape, Digi-Reel) may vary by supplier and distributor. Verify packaging availability with the component supplier for your specific procurement requirements.

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