STPS3L25S Equivalent & Substitute Parts

Part Overview

The STPS3L25S is a Schottky rectifier diode manufactured by STMicroelectronics, rated for 25 V DC reverse voltage and 3 A average rectified current in a Surface Mount SMC (DO-214AB) package. This component is classified as Obsolete, necessitating identification of equivalent substitute parts for ongoing production and maintenance applications. Substitute parts must maintain functional compatibility across critical electrical parameters including voltage rating, current capacity, forward voltage characteristics, and thermal performance while accommodating the Surface Mount SMC package standard.

Substiute Parts

STPS3L25S

STMicroelectronicsIn Stock: 3925STPS3L25S Datasheet

Current PartRFQ

SK33-TP

Micro Commercial CoIn Stock: 5811SK33-TP Datasheet

DirectRFQ

B320-13-F

Diodes IncorporatedIn Stock: 32416B320-13-F Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the STPS3L25S is determined by the following critical parameters:

Mandatory Compatibility Criteria:

• Technology: Schottky rectifier diode
• Mounting Type: Surface Mount
• Package / Case: DO-214AB, SMC
• Current - Average Rectified (Io): 3 A (exact match required)
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
• RoHS Status: ROHS3 Compliant

Voltage Rating Substitution Logic: Substitute parts must have a Voltage - DC Reverse (Vr) (Max) rating equal to or greater than 25 V. Parts with higher voltage ratings (30 V) are electrically compatible in circuits designed for 25 V operation. Parts with lower voltage ratings (20 V) do not meet the minimum voltage requirement and are not suitable substitutes.

Forward Voltage Characteristics: Forward voltage (Vf) at rated current must be evaluated within the context of circuit design requirements. Variations in Vf between 490 mV and 500 mV at 3 A represent acceptable manufacturing tolerances for Schottky diodes.

Reverse Leakage Current: Reverse leakage current specifications vary among substitute candidates. Higher leakage values indicate acceptable performance variation within the Schottky diode technology class.

Parameter Comparison

Engineering Selection Recommendations

SK33-TP (Micro Commercial Co): The SK33-TP is electrically compatible with the STPS3L25S for applications requiring 25 V operation. The 30 V voltage rating provides margin above the 25 V requirement. This part is classified as Not For New Designs, indicating limited long-term availability. RoHS3 compliance and SMC package compatibility are confirmed. Selection of this substitute is appropriate for legacy system maintenance where design changes are not feasible.

B320-13-F (Diodes Incorporated): The B320-13-F is not suitable as a direct substitute for the STPS3L25S. The 20 V maximum reverse voltage rating is below the 25 V specification of the main part. This voltage deficiency creates electrical incompatibility in circuits designed for 25 V operation. The B320-13-F is classified as Active, indicating current production status and long-term availability. This part is appropriate only for applications with maximum operating voltages of 20 V or lower.

Compliance and Certification: All identified parts maintain ROHS3 compliance and are packaged in the DO-214AB SMC standard. Selection between SK33-TP and alternative parts should prioritize long-term component availability and product lifecycle status.

Frequently Asked Questions (FAQ)

Q: Can the B320-13-F replace the STPS3L25S in my circuit?

A: No. The B320-13-F has a maximum reverse voltage rating of 20 V, which is below the 25 V specification of the STPS3L25S. Using this part in a circuit designed for 25 V operation creates electrical incompatibility and risk of component failure.

Q: Is the SK33-TP a direct replacement for the STPS3L25S?

A: The SK33-TP is electrically compatible with the STPS3L25S for 25 V applications. The 30 V rating of the SK33-TP exceeds the 25 V requirement, providing operational margin. Both parts share identical current ratings (3 A), fast recovery speed characteristics, and SMC package specifications. The SK33-TP is classified as Not For New Designs, which may affect long-term availability.

Q: What is the significance of the voltage rating difference between the main part and substitutes?

A: The voltage rating indicates the maximum reverse voltage the diode can withstand without breakdown. The STPS3L25S is rated for 25 V maximum. Substitute parts with equal or higher ratings (30 V) are compatible. Substitute parts with lower ratings (20 V) cannot safely operate at the specified 25 V and are not acceptable replacements.

Q: Are there package compatibility concerns between these parts?

A: All parts listed use the DO-214AB SMC surface mount package. Physical dimensions and PCB footprints are standardized for this package type. No package-related design modifications are required when substituting between these parts.

Q: How do forward voltage differences affect circuit performance?

A: The STPS3L25S specifies 490 mV forward voltage at 3 A, while substitute parts specify 500 mV at 3 A. This 10 mV difference represents normal manufacturing tolerance variation within the Schottky diode technology class and does not create functional incompatibility in standard rectification applications.

Q: What does the Product Status designation mean for component selection?

A: Product Status indicates the manufacturing and support lifecycle. Obsolete parts are no longer manufactured. Not For New Designs parts have limited production and are intended for legacy support only. Active parts are in current production with long-term availability. For new designs, Active status parts are preferred.

Q: Are all listed parts RoHS compliant?

A: Yes. The STPS3L25S, SK33-TP, and B320-13-F are all ROHS3 compliant, meeting environmental and regulatory requirements for electronic component manufacturing and use.