SS22L Equivalent & Substitute Parts

Part Overview

The SS22L is a 2A, 20V 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 in the manufacturer's product portfolio. The part remains in stock with 15,200 units available as original inventory.

Due to its discontinued design status, identifying functionally compatible substitute components is essential for ongoing production support, maintenance applications, and legacy system repairs where the SS22L specification remains applicable.

Substiute Parts

SS22L

Taiwan Semiconductor CorporationIn Stock: 15256SS22L Datasheet

Current PartRFQ

SS24LW

Taiwan Semiconductor CorporationIn Stock: 28433SS24LW Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SS22L is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Current rating must equal or exceed 2A average rectified current
• Reverse voltage rating must equal or exceed 20V maximum DC reverse voltage
• Forward voltage drop must not exceed application circuit tolerances
• Reverse leakage current characteristics must be compatible with circuit requirements
• Recovery speed classification must maintain Fast Recovery performance (≤ 500ns, > 200mA)

Mechanical Compatibility Criteria:

• Surface mount mounting type required
• Package footprint compatibility with SOD-123 or equivalent surface mount packages
• Operating temperature range must encompass -55°C to 125°C junction temperature

Compliance Requirements:

• RoHS3 compliance mandatory
• REACH compliance status must be unaffected or compliant

The SS24LW qualifies as a substitute because it maintains the 2A current rating, exceeds the 20V reverse voltage requirement (rated 40V), operates within the same temperature range, maintains Schottky technology with fast recovery characteristics, and meets all compliance certifications. The higher voltage rating provides design margin for legacy system applications.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: SS24LW

The SS24LW is the manufacturer-recommended substitute for the SS22L. Selection of this component is based on the following engineering factors:

Electrical Performance: The SS24LW maintains identical 2A current handling and fast recovery characteristics. The 40V reverse voltage rating exceeds the SS22L's 20V specification, providing design margin in legacy applications. The forward voltage increase of 50 mV (from 500 mV to 550 mV) must be evaluated within specific circuit requirements; however, this difference is typical between Schottky diode variants and generally acceptable in rectification applications.

Compliance and Support Status: The SS24LW holds Active product status with full manufacturer support, whereas the SS22L is classified as Not For New Designs. Both components maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory compatibility for existing supply chains.

Packaging Consideration: The SS24LW uses SOD-123W packaging versus the SS22L's SOD-123. Both are surface mount packages with similar footprints; however, PCB layout verification is required to confirm mechanical compatibility with existing designs.

Inventory Availability: The SS24LW maintains higher stock levels (28,347 units) compared to the SS22L (15,200 units), supporting long-term production continuity.

Frequently Asked Questions (FAQ)

Q: Can the SS24LW directly replace the SS22L without circuit modification?

A: The SS24LW is electrically backward compatible with the SS22L for applications operating at or below 20V. The higher 40V rating does not create functional issues in lower-voltage circuits. However, the 50 mV increase in forward voltage drop must be evaluated in circuits with tight voltage margin specifications. PCB footprint compatibility between SOD-123 and SOD-123W packages requires verification before implementation.

Q: What is the significance of the higher reverse voltage rating on the SS24LW?

A: The SS24LW's 40V reverse voltage rating exceeds the SS22L's 20V specification. This provides additional design margin and allows the substitute to function in applications requiring higher reverse voltage withstand capability. In applications limited to 20V operation, the higher rating presents no disadvantage and improves component reliability.

Q: Are there packaging differences between SS22L and SS24LW?

A: Yes. The SS22L uses SOD-123 packaging while the SS24LW uses SOD-123W packaging. Both are surface mount packages with similar but not identical footprints. PCB layout and component placement must be verified to ensure mechanical compatibility. Consult package datasheets for precise dimensional specifications.

Q: Do both parts meet current compliance requirements?

A: Yes. Both the SS22L and SS24LW are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component procurement and use.

Q: Why is the SS22L classified as "Not For New Designs"?

A: This classification indicates the SS22L has reached end-of-life status in the manufacturer's product portfolio. New designs should utilize the SS24LW or other active-status alternatives. Existing designs using the SS22L may continue with available inventory or transition to the SS24LW substitute.

Q: What is the difference in reverse leakage current between the two parts?

A: The SS22L exhibits 400 µA reverse leakage at 20V, while the SS24LW exhibits 200 µA reverse leakage at 40V. The SS24LW's lower leakage current represents improved performance and may benefit applications sensitive to leakage-induced power dissipation or noise.

Q: Is the SS24LW the only available substitute?

A: Based on the provided manufacturer data, the SS24LW is the specified substitute for the SS22L. Additional alternatives may exist from other manufacturers; however, only the SS24LW is documented as the manufacturer-recommended equivalent.