SS15LH Equivalent & Substitute Parts

Part Overview

The SS15LH is a 1A, 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 carries automotive-grade qualification (AEC-Q101) and is RoHS3 compliant. Due to its discontinued status, identification of functionally equivalent substitute components is necessary for ongoing production support, maintenance applications, and design transitions.

Substiute Parts

SS15LH

Taiwan Semiconductor CorporationIn Stock: 692SS15LH Datasheet

Current PartRFQ

SS16LWH

Taiwan Semiconductor CorporationIn Stock: 1045SS16LWH Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SS15LH is determined by equivalence across the following critical parameters:

Mandatory Equivalence Criteria:

• Technology: Schottky rectifier diode
• Current Rating: 1A average rectified current
• Voltage Rating: Minimum 50V DC reverse voltage (equal or higher)
• Forward Voltage: 700 mV @ 1A or lower
• Recovery Speed: Fast recovery ≤ 500ns, > 200mA
• Mounting Type: Surface mount
• Temperature Range: -55°C to 150°C or wider
• Grade: Automotive
• Qualification: AEC-Q101

The SS16LWH meets all mandatory equivalence criteria. It provides a higher reverse voltage rating (60V versus 50V), lower reverse leakage current (100 µA @ 60V versus 400 µA @ 50V), and maintains identical forward voltage characteristics. The SS16LWH is classified as Active product status, ensuring continued availability and supply chain support.

Parameter Comparison

Engineering Selection Recommendations

The SS16LWH is the direct substitute for the SS15LH based on electrical and mechanical equivalence. Selection of the SS16LWH is supported by the following factors:

Compliance and Support: The SS16LWH maintains Active product status, ensuring long-term availability and manufacturing support. Both components carry identical automotive-grade qualification (AEC-Q101) and RoHS3 compliance, meeting regulatory requirements for automotive and industrial applications.

Electrical Compatibility: The SS16LWH provides superior electrical characteristics within the same functional envelope. The 60V reverse voltage rating exceeds the 50V requirement of the original design, providing additional margin for transient voltage protection. The reduced reverse leakage current (100 µA @ 60V versus 400 µA @ 50V) improves circuit efficiency and reduces power dissipation.

Functional Equivalence: Forward voltage, current rating, recovery speed, and operating temperature range are identical between the two components. These parameters determine rectification performance in power conversion and protection circuits.

Package Consideration: The SS16LWH uses SOD-123W packaging, a variant of the SOD-123 family. Both packages are surface mount with compatible footprints for standard PCB assembly processes. Verification of PCB layout compatibility with the specific package variant is required during design transition.

Frequently Asked Questions (FAQ)

Q: Can the SS16LWH directly replace the SS15LH in existing designs?

A: The SS16LWH is electrically equivalent to the SS15LH across all critical parameters: 1A current rating, identical forward voltage (700 mV @ 1A), fast recovery speed, and automotive-grade qualification. The higher 60V reverse voltage rating of the SS16LWH is compatible with circuits designed for 50V operation. PCB footprint compatibility between SOD-123 and SOD-123W packages must be confirmed for the specific application.

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

A: Both SOD-123 and SOD-123W are surface mount diode packages within the SOD-123 family. The "W" designation indicates a package variant. Both are compatible with standard surface mount assembly equipment. Physical dimensions and land pattern specifications should be verified against the component datasheets for PCB layout compatibility.

Q: Why does the SS16LWH have lower reverse leakage current than the SS15LH?

A: The SS16LWH is rated at 100 µA @ 60V, while the SS15LH is rated at 400 µA @ 50V. Reverse leakage current is measured at the component's rated reverse voltage. The lower leakage specification of the SS16LWH reflects improved semiconductor manufacturing and material characteristics in the newer product generation.

Q: Are both components suitable for automotive applications?

A: Both the SS15LH and SS16LWH carry automotive-grade classification and AEC-Q101 qualification, meeting automotive industry standards for reliability and quality. Both are suitable for automotive power management, protection, and rectification circuits.

Q: What is the significance of the "Not For New Designs" status of the SS15LH?

A: The "Not For New Designs" status indicates the SS15LH has reached end-of-life and is no longer recommended for new product development. Existing inventory remains available for maintenance and legacy system support. The SS16LWH, classified as Active, is the recommended component for new designs and ongoing production.

Q: Can the SS16LWH be used in applications requiring exactly 50V reverse voltage rating?

A: The SS16LWH is rated for 60V reverse voltage, which exceeds the 50V requirement. In applications where the circuit is designed for 50V operation, the higher rating of the SS16LWH provides additional safety margin and protection against transient overvoltages. No circuit modification is required.