BAV99LT3 Equivalent & Substitute Parts

Part Overview

The BAV99LT3 is a dual switching diode manufactured by onsemi in SOT-23 surface mount packaging. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The BAV99LT3 serves applications requiring dual diode arrays with switching capability at 70V maximum reverse voltage rating.

Substiute Parts

BAV99LT3

onsemiIn Stock: 751BAV99LT3 Datasheet

Current PartRFQ

BAV99LT3G

onsemiIn Stock: 285139BAV99LT3G Datasheet

DirectRFQ

BAV99-E3-18

Vishay General Semiconductor - Diodes DivisionIn Stock: 47245BAV99-E3-18 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the BAV99LT3 is determined by the following critical parameters:

• Diode Configuration: 1 Pair Series Connection (dual diode array)
• Package Type: SOT-23-3 (TO-236-3, SC-59) surface mount
• Voltage Rating: Maximum DC reverse voltage (Vr) of 70V or higher
• Current Rating: Average rectified current (Io) per diode of 150mA or higher
• Forward Voltage: Maximum forward voltage (Vf) of 1.25V at specified current
• Reverse Recovery Time: 6 ns or faster
• Reverse Leakage Current: 2.5 µA @ 70V or lower
• Operating Temperature Range: -55°C to 150°C minimum
• Mounting Type: Surface Mount

Substitute parts must maintain compatibility across all these parameters to ensure functional equivalence in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

BAV99LT3G (Direct Substitute - onsemi)

The BAV99LT3G is the direct active equivalent from the same manufacturer. It maintains the same base product number (BAV99) and identical SOT-23-3 package. The BAV99LT3G exceeds the voltage specification of the obsolete BAV99LT3 (100V vs. 70V) and provides higher current capacity (215mA vs. unspecified). This part is currently in active production status with ROHS3 compliance, making it the preferred choice for new designs and legacy system updates. Inventory availability is substantial (285,100 pcs).

BAV99-E3-18 (Similar Substitute - Vishay)

The BAV99-E3-18 from Vishay General Semiconductor maintains the 70V voltage specification and provides 150mA current rating. This part shares identical package geometry (SOT-23-3) and electrical characteristics including forward voltage and reverse recovery time. The BAV99-E3-18 is active production status with ROHS3 compliance. This option is suitable when onsemi sourcing is constrained. Operating temperature range is -55°C to 150°C, meeting standard industrial requirements.

Both substitute parts are RoHS3 compliant and REACH unaffected, addressing modern regulatory requirements that the obsolete BAV99LT3 does not meet.

Frequently Asked Questions (FAQ)

Q: Can BAV99LT3G replace BAV99LT3 in existing designs?

A: Yes. The BAV99LT3G maintains functional equivalence through identical diode configuration, package type (SOT-23-3), and electrical characteristics. The higher voltage rating (100V) and current capacity (215mA) provide additional design margin without compromising compatibility.

Q: What is the difference between BAV99LT3G and BAV99-E3-18?

A: Both are active production equivalents with SOT-23-3 packaging and 1 Pair Series Connection configuration. The BAV99LT3G offers higher voltage (100V) and current (215mA) ratings from onsemi. The BAV99-E3-18 maintains the original 70V specification from Vishay. Selection depends on voltage margin requirements and supplier availability.

Q: Are the substitute parts pin-compatible?

A: Yes. Both BAV99LT3G and BAV99-E3-18 use identical SOT-23-3 (TO-236-3, SC-59) package geometry, ensuring direct PCB footprint compatibility without layout modifications.

Q: Do the substitute parts meet current regulatory requirements?

A: Yes. Both BAV99LT3G and BAV99-E3-18 are ROHS3 compliant and REACH unaffected. The original BAV99LT3 is RoHS non-compliant, making substitution necessary for designs requiring regulatory compliance.

Q: What is the reverse recovery time specification?

A: Both substitute parts specify 6 ns reverse recovery time, meeting fast switching requirements for standard diode array applications.

Q: Are there inventory considerations for these parts?

A: BAV99LT3G has substantial inventory (285,100 pcs), while BAV99-E3-18 has moderate availability (47,193 pcs). Both are in active production, ensuring long-term supply continuity.