19TQ015STRL Schottky Diode Equivalent & Substitute Parts

Part Overview

The 19TQ015STRL is a Schottky rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 15 V DC reverse voltage and 19 A average rectified current in a surface mount TO-263AB (D2PAK) package. This component is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement requirements. The part exhibits fast recovery characteristics suitable for high-frequency switching applications.

Substiute Parts

19TQ015STRL

Vishay General Semiconductor - Diodes DivisionIn Stock: 160219TQ015STRL Datasheet

Current PartRFQ

STPS20L15G-TR

STMicroelectronicsIn Stock: 9307STPS20L15G-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 19TQ015STRL is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Voltage - DC Reverse (Vr) rating must equal or exceed 15 V
• Current - Average Rectified (Io) rating must equal or exceed 19 A
• Technology classification must be Schottky
• Speed characteristic must be Fast Recovery (≤ 500ns, > 200mA)

Mechanical Compatibility Criteria:

• Package / Case must be TO-263-3 or D2PAK (2 Leads + Tab) configuration
• Mounting type must be Surface Mount

Operational Criteria:

• Operating temperature range must accommodate the application requirements
• Junction temperature maximum must support thermal design constraints

The substitute part STPS20L15G-TR meets all mandatory electrical and mechanical compatibility requirements while providing enhanced current rating and active product status.

Parameter Comparison

Engineering Selection Recommendations

The STPS20L15G-TR is a direct functional substitute for the 19TQ015STRL based on the following engineering criteria:

Electrical Equivalence: Both devices share identical 15 V reverse voltage ratings and fast recovery Schottky technology. The STPS20L15G-TR provides 20 A current capacity, exceeding the 19 A requirement of the original part, ensuring adequate margin for circuit operation.

Package Compatibility: Both components utilize the TO-263-3 D2PAK surface mount package with identical pinout and thermal characteristics, enabling direct PCB layout compatibility without redesign.

Compliance Status: The STPS20L15G-TR holds ROHS3 compliance and REACH unaffected status, addressing regulatory requirements that may not be satisfied by the obsolete, non-compliant 19TQ015STRL.

Product Availability: The STPS20L15G-TR maintains active product status with substantial inventory availability, ensuring long-term procurement reliability compared to the obsolete original part.

Thermal Performance: Both devices support identical maximum junction temperature ratings of 125°C, maintaining thermal design compatibility.

Frequently Asked Questions (FAQ)

Q: Can the STPS20L15G-TR directly replace the 19TQ015STRL without PCB modifications?

A: Yes. Both devices utilize the TO-263-3 D2PAK package with identical pinout and lead configuration. No PCB layout changes are required for mechanical or electrical integration.

Q: What is the significance of the higher current rating (20 A vs. 19 A) in the substitute part?

A: The increased current capacity of the STPS20L15G-TR provides design margin and reduces thermal stress during operation at rated current levels. This enhancement does not create compatibility issues and improves circuit reliability.

Q: How do the forward voltage characteristics compare between the two parts?

A: The 19TQ015STRL exhibits 360 mV forward voltage at 19 A, while the STPS20L15G-TR exhibits 410 mV at 19 A. This 50 mV difference represents approximately 12% higher forward voltage drop in the substitute part. Circuit designs sensitive to power dissipation or voltage regulation must account for this parameter variance.

Q: What is the impact of the higher reverse leakage current in the STPS20L15G-TR?

A: The STPS20L15G-TR exhibits 6 mA reverse leakage at 15 V compared to 1.5 mA in the original part. This four-fold increase may impact circuits with stringent leakage specifications or high-impedance applications. Verification against circuit requirements is necessary for sensitive applications.

Q: Why is RoHS compliance status relevant for this substitution?

A: The 19TQ015STRL is RoHS non-compliant, while the STPS20L15G-TR is ROHS3 compliant. For applications subject to RoHS regulations or customer requirements, the substitute part satisfies compliance mandates that the original part cannot meet.

Q: Are there any thermal considerations when substituting these parts?

A: Both devices support identical maximum junction temperature ratings of 125°C. However, the higher forward voltage of the STPS20L15G-TR generates increased power dissipation at equivalent current levels. Thermal design calculations should account for the additional heat generation to ensure adequate heat sinking.

Q: What packaging options are available for the STPS20L15G-TR?

A: The STPS20L15G-TR is supplied in Cut Tape (CT) and Digi-Reel® packaging formats, providing flexibility for both prototype and production procurement workflows.