SM8S24A-TP Equivalent & Substitute Parts

Part Overview

The SM8S24A-TP is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Micro Commercial Co, designed for surface mount applications in DO-218AB packaging. This component provides transient overvoltage protection with a 24V reverse standoff voltage and 38.9V maximum clamping voltage at peak pulse current of 170A. The part carries automotive-grade qualification (AEC-Q101) and is ROHS3 compliant.

The SM8S24A-TP is designated as "Not For New Designs," indicating it has reached end-of-life status. Identifying equivalent substitute parts is necessary for ongoing production support, maintenance applications, and design continuity where this component is already deployed in existing systems.

Substiute Parts

SM8S24A-TP

Micro Commercial CoIn Stock: 2268SM8S24A-TP Datasheet

Current PartRFQ

SLD8S24A

Littelfuse Inc.In Stock: 3515SLD8S24A Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SM8S24A-TP is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Voltage - Reverse Standoff (Typ): 24V
• Voltage - Breakdown (Min): 26.7V
• Voltage - Clamping (Max) @ Ipp: 38.9V
• Current - Peak Pulse (10/1000µs): minimum 170A
• Type: Zener, Unidirectional
• Operating Temperature Range: -55°C to 175°C (TJ)

Mechanical & Compliance Criteria:

• Mounting Type: Surface Mount
• Grade: Automotive
• Qualification: AEC-Q101
• RoHS Status: ROHS3 Compliant

The SLD8S24A from Littelfuse Inc. meets all critical electrical parameters with equivalent voltage ratings and exceeds the peak pulse current specification (180A vs. 170A). Both parts maintain identical automotive qualification, temperature range, and compliance certifications. Package differences (DO-218AB vs. SMTO-263) represent alternative surface mount form factors suitable for different PCB layouts while maintaining functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

The SLD8S24A qualifies as a direct functional substitute for the SM8S24A-TP based on electrical parameter equivalence and compliance alignment. Both components maintain identical voltage specifications (24V standoff, 26.7V breakdown, 38.9V clamping) and automotive-grade AEC-Q101 qualification. The SLD8S24A carries active product status, ensuring continued availability and manufacturing support, whereas the SM8S24A-TP is designated end-of-life.

The SLD8S24A demonstrates superior performance margins with 180A peak pulse current capacity versus 170A, and 7000W peak pulse power versus 6600W. Both parts maintain identical operating temperature range (-55°C to 175°C) and ROHS3 compliance. Package form factor differences (DO-218AB vs. SMTO-263) require PCB layout verification but do not affect electrical functionality.

Selection of the SLD8S24A is appropriate for applications requiring continued production support and long-term component availability while maintaining full electrical and compliance equivalence to the original SM8S24A-TP specification.

Frequently Asked Questions (FAQ)

Q: Can the SLD8S24A directly replace the SM8S24A-TP in existing designs?

A: Yes, the SLD8S24A provides electrical equivalence across all critical parameters: identical 24V reverse standoff voltage, 26.7V breakdown voltage, and 38.9V clamping voltage. Both components maintain AEC-Q101 automotive qualification and ROHS3 compliance. Package form factor differences (DO-218AB vs. SMTO-263) require PCB footprint verification but do not affect circuit performance.

Q: What is the significance of the different package designations?

A: DO-218AB and SMTO-263 are alternative surface mount package formats for TVS diodes. Both are surface mount configurations suitable for automated assembly. PCB layout and footprint design must accommodate the specific package geometry. Consult manufacturer datasheets for precise dimensional specifications and land pattern requirements.

Q: Why is the SM8S24A-TP marked "Not For New Designs"?

A: This designation indicates the component has reached end-of-life status and is no longer recommended for new product development. Existing inventory remains available for production support and maintenance applications. The SLD8S24A, with active product status, is the recommended alternative for ongoing and future designs.

Q: Are there performance differences between these parts?

A: The SLD8S24A exceeds the SM8S24A-TP specifications in peak pulse current (180A vs. 170A) and peak pulse power (7000W vs. 6600W). These represent performance improvements that enhance transient suppression capability. All other electrical parameters remain equivalent.

Q: What compliance certifications apply to both parts?

A: Both the SM8S24A-TP and SLD8S24A carry AEC-Q101 automotive qualification, ROHS3 compliance, and Moisture Sensitivity Level 1 (unlimited). Both are suitable for automotive and industrial applications requiring automotive-grade component qualification.