19TQ015STRR Schottky Diode Equivalent & Substitute Parts

Part Overview

The 19TQ015STRR 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

19TQ015STRR

Vishay General Semiconductor - Diodes DivisionIn Stock: 1211819TQ015STRR Datasheet

Current PartRFQ

STPS20L15G-TR

STMicroelectronicsIn Stock: 9307STPS20L15G-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 19TQ015STRR 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, D2PAK (2 Leads + Tab) or equivalent D2PAK variant
• Mounting type must be Surface Mount
• Pin configuration must maintain electrical equivalence

Compliance Considerations:

• Product status transition from obsolete to active availability
• RoHS compliance status
• Operating temperature range capability

The STPS20L15G-TR from STMicroelectronics meets all electrical and mechanical substitution criteria, with enhanced current rating (20 A vs. 19 A) and active product status.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: STPS20L15G-TR

The STPS20L15G-TR is the direct functional equivalent for the 19TQ015STRR. Both devices share identical reverse voltage ratings (15 V) and fast recovery Schottky technology. The substitute provides a 1 A higher current rating (20 A vs. 19 A), ensuring adequate margin for the original 19 A specification. Both components utilize the same D2PAK surface mount package with identical pinout configuration.

Compliance Advantage:

The STPS20L15G-TR holds active product status with ROHS3 compliance certification, addressing the obsolescence of the original part. The 19TQ015STRR is classified as RoHS non-compliant and obsolete, making continued procurement impractical for new designs or long-term production support.

Parameter Considerations:

Forward voltage at 19 A increases from 360 mV to 410 mV in the substitute, representing a 50 mV differential. This variance falls within typical design margins for rectifier applications and does not preclude direct substitution. Reverse leakage current increases from 1.5 mA to 6 mA at 15 V, remaining within acceptable limits for most power conversion circuits. The maximum junction temperature specification of 125°C in the substitute aligns with the upper bound of the original part's operating range.

Frequently Asked Questions (FAQ)

Q: Can the STPS20L15G-TR directly replace the 19TQ015STRR without circuit modification?

A: Yes. Both devices are Schottky rectifiers with identical 15 V reverse voltage ratings, fast recovery characteristics, and D2PAK surface mount packages. The 1 A higher current rating of the substitute provides design margin. Pin configuration and electrical function are equivalent.

Q: What is the significance of the higher forward voltage in the STPS20L15G-TR?

A: The forward voltage increases from 360 mV to 410 mV at 19 A. This 50 mV difference represents approximately 1.4% additional voltage drop. For most rectifier applications, this variance is absorbed within circuit design tolerances and does not require redesign.

Q: Does the increased reverse leakage current affect circuit performance?

A: The reverse leakage increases from 1.5 mA to 6 mA at 15 V. For rectifier applications, this leakage current remains negligible relative to forward current operation and does not impact circuit functionality in standard power conversion designs.

Q: Are the packages mechanically identical?

A: Yes. Both the 19TQ015STRR and STPS20L15G-TR use the TO-263-3 D2PAK package with 2 leads plus tab. PCB footprints and thermal management characteristics are identical, enabling direct board-level substitution.

Q: Why is product status important for this substitution?

A: The 19TQ015STRR is obsolete, indicating discontinued manufacturing and limited inventory availability. The STPS20L15G-TR is active with established supply chains and ongoing production support, ensuring long-term component availability for production and field service requirements.

Q: What is the compliance difference between these parts?

A: The 19TQ015STRR is RoHS non-compliant and obsolete. The STPS20L15G-TR is ROHS3 compliant and active, meeting current environmental and regulatory requirements for new designs and manufacturing operations.

Q: Can the STPS20L15G-TR be used in existing designs without qualification?

A: The electrical and mechanical parameters are equivalent within acceptable engineering tolerances. The substitute operates within the same voltage and current specifications, uses identical packaging, and maintains fast recovery Schottky characteristics. Circuit-level validation follows standard engineering practice for component substitution.