SS26LH Equivalent & Substitute Parts

Part Overview

The SS26LH is a 2A, 60V Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation, designed for surface mount applications in the SOD-123 package. This component is classified as "Not For New Designs," indicating it has been superseded in the manufacturer's product line. The fast recovery characteristic (≤500ns at >200mA) and automotive-grade qualification (AEC-Q101) make this diode suitable for power conversion and protection circuits requiring efficient rectification at moderate voltage and current levels.

Due to its obsolescence status, identifying equivalent substitute parts with matching electrical and mechanical specifications is essential for design continuity, production support, and legacy system maintenance.

Substiute Parts

SS26LH

Taiwan Semiconductor CorporationIn Stock: 1123SS26LH Datasheet

Current PartRFQ

SS26LWH

Taiwan Semiconductor CorporationIn Stock: 36742SS26LWH Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SS26LH is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

• Voltage - DC Reverse (Vr) (Max): 60 V
• Current - Average Rectified (Io): 2 A
• Voltage - Forward (Vf) (Max) @ If: 700 mV @ 2 A
• Speed: Fast Recovery ≤500ns, >200mA (Io)
• Technology: Schottky

Mechanical & Environmental Criteria:

• Mounting Type: Surface Mount
• Operating Temperature - Junction: -55°C ~ 150°C
• RoHS Status: ROHS3 Compliant
• Grade: Automotive
• Qualification: AEC-Q101

Package Compatibility: The SS26LH uses the SOD-123 package. Substitute parts must maintain electrical and thermal performance within the same or compatible package footprint. The SOD-123W package variant is mechanically and electrically compatible with SOD-123 applications, provided PCB layout accommodates the wider lead configuration.

Parameter Comparison

Engineering Selection Recommendations

SS26LWH as Primary Substitute:

The SS26LWH is the manufacturer-recommended substitute for the SS26LH. Both components share identical electrical specifications across all critical parameters: 60V reverse voltage rating, 2A average rectified current, 700mV forward voltage drop at 2A, and fast recovery switching characteristics.

The SS26LWH offers the following advantages:

• Active Product Status: The SS26LWH maintains active production status, ensuring long-term availability and supply chain continuity compared to the obsolete SS26LH.
• Improved Reverse Leakage: The SS26LWH exhibits 200µA reverse leakage at 60V, compared to 400µA for the SS26LH, representing a 50% reduction in leakage current. This improvement enhances efficiency in low-power standby conditions.
• Moisture Sensitivity Level (MSL): The SS26LWH is rated MSL 1 (Unlimited), indicating superior moisture resistance and extended shelf life without special storage requirements.
• Package Compatibility: The SOD-123W package is mechanically and electrically compatible with SOD-123 footprints. PCB layout verification is required to confirm lead spacing accommodation.
• Compliance Alignment: Both components maintain ROHS3 compliance, REACH Unaffected status, and identical tariff classifications, ensuring regulatory and procurement consistency.

Qualification & Certification:

The SS26LH carries AEC-Q101 automotive qualification. The SS26LWH specifications provided do not explicitly reference AEC-Q101 qualification in the input data. Verification of automotive-grade qualification status for the SS26LWH is necessary if the application requires automotive-level reliability standards.

Frequently Asked Questions (FAQ)

Q: Can the SS26LWH directly replace the SS26LH in existing designs?

A: The SS26LWH is electrically equivalent to the SS26LH across all specified parameters. The primary consideration is package compatibility. The SS26LWH uses the SOD-123W package variant, which has a wider lead configuration than the SOD-123 package used by the SS26LH. PCB layout must be verified to confirm that the SOD-123W footprint accommodates the existing circuit board design. If the PCB is designed for SOD-123 only, physical interference may occur.

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

A: Both packages are surface mount diode packages with identical electrical performance and thermal characteristics. The primary difference is the lead width: SOD-123W has wider leads than SOD-123. This affects PCB pad spacing and component placement. Designs using SOD-123 pads may require layout modification to accommodate SOD-123W components.

Q: Why is the reverse leakage current lower in the SS26LWH?

A: The SS26LWH exhibits 200µA reverse leakage at 60V, compared to 400µA for the SS26LH. This difference reflects manufacturing process improvements in the active SS26LWH product line. Lower reverse leakage reduces power dissipation in standby conditions and improves overall circuit efficiency.

Q: Is the SS26LWH suitable for automotive applications?

A: The SS26LH carries explicit AEC-Q101 automotive qualification. The input data for the SS26LWH does not include AEC-Q101 qualification status. If the application requires automotive-grade reliability certification, confirmation of AEC-Q101 qualification for the SS26LWH is required before design implementation.

Q: What is the MSL rating, and why does it matter?

A: MSL (Moisture Sensitivity Level) indicates how sensitive a component is to moisture absorption during storage and handling. The SS26LWH is rated MSL 1 (Unlimited), meaning it has minimal moisture sensitivity and does not require special dry-pack storage or baking procedures before soldering. The SS26LH MSL rating is not specified in the input data.

Q: Are there any compliance or regulatory differences between the two parts?

A: Both the SS26LH and SS26LWH are ROHS3 compliant, REACH Unaffected, and classified under identical ECCN (EAR99) and HTSUS (8541.10.0080) codes. No regulatory or compliance differences exist between the two components.

Q: What is the supply status difference between SS26LH and SS26LWH?

A: The SS26LH is classified as "Not For New Designs," indicating manufacturer discontinuation and limited future availability. The SS26LWH is classified as "Active," ensuring ongoing production, supply chain availability, and long-term support. For new designs and legacy system maintenance, the SS26LWH is the recommended choice.