SS25L Equivalent & Substitute Parts

Part Overview

The SS25L is a 2A, 50V Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation, housed in a SOD-123 surface mount package. This component is classified as "Not For New Designs," indicating it has reached end-of-life status. The part is ROHS3 compliant and REACH unaffected, with 15,100 units currently in stock.

Due to its discontinued design status, identifying equivalent substitute parts is necessary for ongoing production support, maintenance applications, and design transitions to active product lines. Substitute parts must maintain functional compatibility while meeting or exceeding the electrical and mechanical specifications of the original component.

Substiute Parts

SS25L

Taiwan Semiconductor CorporationIn Stock: 15207SS25L Datasheet

Current PartRFQ

SS26LW

Taiwan Semiconductor CorporationIn Stock: 28032SS26LW Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SS25L are selected based on the following critical parameters that determine functional compatibility:

Electrical Compatibility Criteria:

• Current rating: Must support 2A average rectified current (Io)
• Voltage rating: Must equal or exceed 50V DC reverse voltage (Vr)
• Forward voltage: Must not exceed 700 mV @ 2A
• Leakage current: Must not exceed 400 µA @ rated Vr
• Recovery speed: Must maintain fast recovery characteristics (≤ 500ns, > 200mA)

Mechanical Compatibility Criteria:

• Technology: Schottky diode type
• Mounting: Surface mount configuration
• Package: SOD-123 or compatible surface mount package variants

Compliance Criteria:

• RoHS3 compliance required
• REACH unaffected status required

The SS26LW qualifies as a direct substitute because it meets or exceeds all electrical parameters while maintaining surface mount compatibility and regulatory compliance. The higher voltage rating (60V) and lower leakage current (200 µA @ 60V) provide enhanced performance margins over the original SS25L specification.

Parameter Comparison

Engineering Selection Recommendations

The SS26LW is the manufacturer-recommended substitute for the SS25L. Selection of this substitute is based on the following engineering factors:

Product Status Justification: The SS25L carries "Not For New Designs" status, indicating discontinuation. The SS26LW is classified as "Active," ensuring continued availability and manufacturing support for ongoing production requirements.

Electrical Performance: The SS26LW maintains identical forward voltage characteristics (700 mV @ 2A) and recovery speed specifications while providing a 10V higher reverse voltage rating (60V vs. 50V). This increased voltage margin reduces stress on the component in applications with voltage transients or supply variations. The reverse leakage current is reduced by 50% (200 µA @ 60V vs. 400 µA @ 50V), improving efficiency and reducing power dissipation.

Thermal Performance: The SS26LW extends the maximum junction temperature range to 150°C, compared to 125°C for the SS25L, providing enhanced thermal headroom in high-temperature operating environments.

Regulatory Compliance: Both components maintain ROHS3 compliance and REACH unaffected status, ensuring compatibility with current environmental and regulatory requirements.

Package Compatibility: The SS26LW uses SOD-123W packaging, a compatible variant of the SOD-123 package. Both packages are surface mount configurations with equivalent footprints suitable for standard PCB assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the SS26LW be used as a direct replacement for the SS25L in existing designs?

A: Yes. The SS26LW meets or exceeds all electrical specifications of the SS25L. The forward voltage, current rating, and recovery speed are identical. The higher voltage rating and lower leakage current provide performance improvements. The SOD-123W package is compatible with SOD-123 PCB footprints used in existing designs.

Q: What is the difference between SOD-123 and SOD-123W packages?

A: Both are surface mount Schottky diode packages with compatible footprints. SOD-123W is a variant designation used by the manufacturer. Both packages support standard reflow soldering processes and are suitable for automated PCB assembly.

Q: Does the higher voltage rating (60V vs. 50V) of the SS26LW affect circuit operation?

A: No. A higher voltage rating does not negatively affect circuit operation. The component will function correctly in circuits designed for 50V operation. The higher rating provides additional safety margin against voltage transients and overvoltage conditions.

Q: Is the SS26LW available in the same packaging format as the SS25L?

A: Yes. The SS26LW is supplied in Tape & Reel (TR) format, matching the SS25L packaging. Current inventory of the SS26LW is 27,937 units.

Q: Are there any thermal considerations when substituting the SS26LW for the SS25L?

A: The SS26LW has a higher maximum junction temperature rating (-55°C to 150°C vs. -55°C to 125°C). This provides additional thermal margin. The identical forward voltage and lower leakage current may result in slightly reduced power dissipation compared to the original part.

Q: What compliance certifications apply to the SS26LW?

A: The SS26LW is ROHS3 compliant and REACH unaffected, matching the compliance status of the SS25L. Both components meet current environmental and regulatory requirements.

Q: Why is the SS25L marked "Not For New Designs"?

A: This designation indicates the part has reached end-of-life status and is no longer recommended for new product development. The SS26LW, classified as "Active," is the recommended alternative for new designs and ongoing production support.