BAV70LT3 Equivalent & Substitute Parts

Part Overview

The BAV70LT3 is a dual switching diode array manufactured by onsemi, configured as a 1 Pair Common Cathode diode in a SOT-23 surface mount package. This component is classified as obsolete, which necessitates identification of active equivalent and substitute parts for ongoing design requirements and procurement needs. The BAV70LT3 operates at a maximum reverse voltage of 70V with specifications suitable for small-signal switching applications.

Substiute Parts

BAV70LT3

onsemiIn Stock: 1066BAV70LT3 Datasheet

Current PartRFQ

BAV70LT3G

onsemiIn Stock: 75427BAV70LT3G Datasheet

DirectRFQ

BAV70-E3-18

Vishay General Semiconductor - Diodes DivisionIn Stock: 9897BAV70-E3-18 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BAV70LT3 is determined by the following critical parameters:

Mandatory Compatibility Criteria:

• Diode Configuration: 1 Pair Common Cathode (pin-compatible requirement)
• Package / Case: SOT-23-3 (TO-236-3, SC-59) (physical and electrical footprint requirement)
• Mounting Type: Surface Mount (assembly process compatibility)
• Voltage - DC Reverse (Vr) (Max): Equal to or greater than 70V (electrical stress rating)
• Technology: Standard (functional equivalence)

Substitute Parts Identified:

1. BAV70LT3G (onsemi) - Direct manufacturer equivalent with enhanced specifications and active product status
2. BAV70-E3-18 (Vishay General Semiconductor - Diodes Division) - Cross-manufacturer substitute with equivalent base product series

Both substitute parts maintain the required 1 Pair Common Cathode configuration and SOT-23-3 package specification. The substitutes are active products with current manufacturing status and improved compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

BAV70LT3G (onsemi) - Primary Substitute:

The BAV70LT3G is the direct manufacturer equivalent from onsemi and is the preferred substitute for the obsolete BAV70LT3. This part maintains identical pin configuration and package specification while providing enhanced electrical performance. The BAV70LT3G features a higher maximum reverse voltage rating (100V versus 70V), increased average rectified current capability (200mA versus unspecified), and active product status with current manufacturing support. The part carries ROHS3 compliance certification, addressing regulatory requirements that the original BAV70LT3 does not meet. Inventory availability is substantial at 75,400 pieces.

BAV70-E3-18 (Vishay General Semiconductor - Diodes Division) - Secondary Substitute:

The BAV70-E3-18 serves as a cross-manufacturer substitute from Vishay, maintaining the same base product series designation (BAV70) and identical package specification. This part matches the original 70V reverse voltage rating and provides equivalent small-signal switching performance with 6ns reverse recovery time. The BAV70-E3-18 is an active product with ROHS3 compliance and adequate inventory availability at 9,819 pieces. This option is suitable for applications where cross-manufacturer sourcing is acceptable and where the 70V rating is the design requirement.

Compliance Considerations:

Both substitute parts are ROHS3 compliant and REACH unaffected, addressing modern regulatory requirements. The original BAV70LT3 is RoHS non-compliant, making transition to either substitute necessary for new designs or procurement cycles subject to RoHS regulations.

Frequently Asked Questions (FAQ)

Q: Can BAV70LT3G be used as a direct replacement for BAV70LT3?

A: Yes. The BAV70LT3G maintains identical pin configuration, diode array topology (1 Pair Common Cathode), and SOT-23-3 package specification. The higher voltage rating (100V) and increased current capability (200mA) provide enhanced performance margins. No circuit modifications are required.

Q: What is the difference between BAV70LT3G and BAV70-E3-18?

A: Both parts are pin-compatible substitutes with identical package specifications. The primary differences are manufacturer (onsemi versus Vishay), maximum reverse voltage rating (100V versus 70V), and average rectified current per diode (200mA versus 125mA). The BAV70LT3G provides higher performance specifications. Selection depends on voltage and current requirements, manufacturer preference, and supply chain considerations.

Q: Are the substitute parts physically compatible with the original PCB layout?

A: Yes. Both BAV70LT3G and BAV70-E3-18 use the SOT-23-3 (TO-236-3, SC-59) package with identical pin assignments and footprint dimensions. No PCB redesign is necessary.

Q: What is the significance of the 70V versus 100V reverse voltage rating?

A: The BAV70LT3 and BAV70-E3-18 are rated for 70V maximum reverse voltage. The BAV70LT3G is rated for 100V. For applications operating at or below 70V, both substitutes are acceptable. For applications requiring higher voltage margins or operating near 70V, the BAV70LT3G provides additional safety margin.

Q: Why is the BAV70LT3 listed as obsolete?

A: The BAV70LT3 is an obsolete product from onsemi. The active equivalent BAV70LT3G is the current production part and should be used for new designs and ongoing procurement.

Q: Are there any temperature range differences between the substitutes?

A: The BAV70LT3G specifies an operating junction temperature range of -55°C to 150°C. The BAV70-E3-18 specifies a maximum junction temperature of 150°C. For applications requiring operation below -55°C, the BAV70LT3G is the appropriate choice.

Q: What is the packaging format difference between the substitutes?

A: The BAV70LT3G is supplied in Cut Tape (CT) and Digi-Reel® packaging. The BAV70-E3-18 is supplied in Tape & Reel (TR) packaging. Both formats are standard surface mount packaging suitable for automated assembly. Selection depends on procurement volume and assembly process requirements.

Q: Are both substitute parts RoHS compliant?

A: Yes. Both BAV70LT3G and BAV70-E3-18 are ROHS3 compliant. The original BAV70LT3 is RoHS non-compliant. For applications subject to RoHS regulations, either substitute is acceptable.