SR515 Schottky Diode Equivalent & Substitute Parts

Part Overview

The SR515 is an active Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 150 V DC reverse voltage and 5 A average rectified current in a DO-201AD through-hole axial package. This component is used in power supply circuits, voltage regulation applications, and fast-switching rectification stages where low forward voltage drop and rapid recovery characteristics are required.

Equivalent and substitute parts are identified when design requirements permit alternative packaging formats, current ratings, or when primary inventory is unavailable. Substitution eligibility is determined by matching critical electrical parameters including reverse voltage rating, forward voltage characteristics, recovery speed, and thermal operating range within the constraints of the application circuit.

Substiute Parts

SR515

Taiwan Semiconductor CorporationIn Stock: 3691SR515 Datasheet

Current PartRFQ

SR515 A0G

Taiwan Semiconductor CorporationIn Stock: 1927SR515 A0G Datasheet

Parametric EquivalentRFQ

STPS3150RL

STMicroelectronicsIn Stock: 25491STPS3150RL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SR515 are classified into two categories based on electrical and mechanical compatibility:

Parametric Equivalent (Full Substitution): Parts that maintain identical electrical specifications across all critical parameters including reverse voltage rating, average rectified current, forward voltage drop, recovery speed, and reverse leakage current. These parts differ only in packaging format (tape and reel versus cut tape) and are directly interchangeable in circuit applications.

Similar Manufacturer Part (Application-Dependent Substitution): Parts that share the same reverse voltage rating and package form factor but differ in average rectified current rating or forward voltage characteristics. These parts are suitable for substitution only when the application circuit can tolerate the specified parameter variations.

The following parameters determine substitution eligibility:

• Voltage - DC Reverse (Vr) (Max): Must equal or exceed application requirement
• Current - Average Rectified (Io): Must meet or exceed application requirement
• Package / Case: Must be DO-201AD, Axial for mechanical compatibility
• Mounting Type: Must be Through Hole
• Technology: Must be Schottky

Parameter Comparison

Engineering Selection Recommendations

SR515 A0G (Parametric Equivalent): This part is a direct electrical equivalent to the SR515, maintaining identical voltage, current, and thermal specifications. The only difference is the packaging format: SR515 A0G is supplied in cut tape format while the SR515 is supplied in tape and reel format. Selection of SR515 A0G is appropriate when cut tape packaging is acceptable for assembly processes or when tape and reel inventory is depleted. Both parts are ROHS3 compliant and carry identical compliance certifications.

STPS3150RL (Similar Manufacturer Part): This STMicroelectronics part shares the same 150 V reverse voltage rating and DO-201AD package form factor as the SR515. However, the STPS3150RL is rated for 3 A average rectified current compared to the SR515's 5 A rating. The STPS3150RL exhibits lower forward voltage drop (820 mV @ 3 A) and significantly lower reverse leakage current (2 µA @ 150 V versus 100 µA @ 150 V). The STPS3150RL is suitable for substitution only in applications where the circuit current requirement does not exceed 3 A. The higher maximum junction temperature rating (175°C) of the STPS3150RL provides extended thermal margin in high-temperature environments. Both parts are ROHS3 compliant.

Frequently Asked Questions (FAQ)

Q: Can SR515 A0G be used as a direct replacement for SR515?

A: Yes. SR515 A0G is a parametric equivalent with identical electrical specifications. The parts differ only in packaging format: SR515 is supplied in tape and reel format while SR515 A0G is supplied in cut tape format. Both are suitable for the same circuit applications.

Q: Under what conditions can STPS3150RL substitute for SR515?

A: STPS3150RL can substitute for SR515 only when the application circuit current requirement does not exceed 3 A. The STPS3150RL is rated for 3 A average rectified current, which is lower than the SR515's 5 A rating. Both parts share the same 150 V reverse voltage rating and DO-201AD package. If the circuit requires more than 3 A, STPS3150RL is not suitable.

Q: What is the significance of the different reverse leakage current values?

A: The SR515 and SR515 A0G both exhibit 100 µA reverse leakage current at 150 V, while the STPS3150RL exhibits only 2 µA at the same voltage. Lower reverse leakage current reduces standby power consumption and heat generation in the diode. Applications sensitive to leakage current may benefit from the STPS3150RL, provided the 3 A current rating is sufficient.

Q: Are all three parts mechanically compatible with the same PCB footprint?

A: Yes. All three parts use the DO-201AD axial package with through-hole mounting. They are mechanically compatible with identical PCB footprints and lead spacing.

Q: What compliance certifications apply to these parts?

A: All three parts are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99. Moisture sensitivity level is 1 (unlimited) for all parts.

Q: Does the operating temperature range differ between these parts?

A: The SR515 and SR515 A0G both operate from -55°C to 150°C junction temperature. The STPS3150RL has a maximum junction temperature of 175°C, providing 25°C additional thermal margin. The minimum operating temperature for STPS3150RL is not specified in the provided data.