STPS20L15D Equivalent & Substitute Parts

Part Overview

The STPS20L15D is a Schottky rectifier diode rated for 15 V DC reverse voltage and 20 A average rectified current in a through-hole TO-220AC package. Manufactured by Vishay General Semiconductor - Diodes Division, this component is classified as obsolete. Due to its obsolete product status, identifying equivalent and substitute parts is necessary for ongoing design support, production continuity, and component sourcing in applications requiring 15 V / 20 A Schottky rectification.

Substiute Parts

STPS20L15D

Vishay General Semiconductor - Diodes DivisionIn Stock: 1972STPS20L15D Datasheet

Current PartRFQ

DSS20-0015B

IXYSIn Stock: 2953DSS20-0015B Datasheet

MFR RecommendedRFQ

STPS20L15D

Vishay General Semiconductor - Diodes DivisionIn Stock: 1972STPS20L15D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the STPS20L15D is determined by electrical and mechanical parameter equivalence within the Schottky rectifier diode category. The following parameters establish substitution eligibility:

Electrical Parameters (Critical):

• Voltage - DC Reverse (Vr) (Max): 15 V
• Current - Average Rectified (Io): 20 A
• Technology: Schottky
• Speed: Fast Recovery ≤ 500 ns, > 200 mA (Io)
• Current - Reverse Leakage @ Vr: 10 mA @ 15 V

Mechanical Parameters (Critical):

• Mounting Type: Through Hole
• Package / Case: TO-220-2
• Supplier Device Package: TO-220AC

Substitute parts must match all critical electrical and mechanical parameters to ensure functional and physical compatibility in existing circuit designs and PCB layouts.

Parameter Comparison

Engineering Selection Recommendations

STPS20L15D (Vishay): This part is classified as obsolete and carries RoHS non-compliant status. It remains suitable for legacy system maintenance and repair applications where original component specifications are required. Continued sourcing is limited due to obsolete classification.

DSS20-0015B (IXYS): This part is classified as active and carries ROHS3 compliance certification. It meets all critical electrical and mechanical parameters equivalent to the STPS20L15D and provides extended operating temperature range (-55°C ~ 150°C versus -55°C ~ 125°C). The DSS20-0015B is the recommended substitute for new designs, production continuity, and applications requiring RoHS compliance. Forward voltage specification differs slightly (450 mV @ 20 A versus 410 mV @ 19 A), remaining within acceptable Schottky diode performance variation for 15 V / 20 A rectification circuits.

Frequently Asked Questions (FAQ)

Q: Can the DSS20-0015B replace the STPS20L15D in existing applications?

A: Yes. Both parts share identical voltage rating (15 V), current rating (20 A), fast recovery speed characteristics (≤ 500 ns), reverse leakage specification (10 mA @ 15 V), and TO-220AC package configuration. Physical and electrical compatibility is established.

Q: What is the significance of the forward voltage difference between these parts?

A: The STPS20L15D specifies 410 mV @ 19 A, while the DSS20-0015B specifies 450 mV @ 20 A. This 40 mV difference at slightly different test currents is within normal Schottky diode manufacturing tolerance and does not affect circuit functionality in standard rectification applications. Both values remain typical for 15 V Schottky rectifiers.

Q: Why is the DSS20-0015B preferred over the STPS20L15D?

A: The DSS20-0015B carries active product status and ROHS3 compliance certification, ensuring long-term availability and regulatory alignment. The STPS20L15D is obsolete and RoHS non-compliant, limiting sourcing options and regulatory suitability for new production.

Q: Are there package or mounting differences between these parts?

A: No. Both parts use identical through-hole TO-220-2 package configuration with TO-220AC supplier device package designation. PCB layout and thermal management considerations remain unchanged.

Q: What is the operating temperature range difference?

A: The STPS20L15D operates from -55°C to 125°C junction temperature, while the DSS20-0015B extends to -55°C to 150°C. The DSS20-0015B provides 25°C additional high-temperature margin, beneficial for applications in elevated thermal environments.

Q: Are both parts RoHS compliant?

A: The STPS20L15D is RoHS non-compliant. The DSS20-0015B is ROHS3 compliant. For applications subject to RoHS regulatory requirements, the DSS20-0015B is the appropriate selection.