SM8S22A-TP Equivalent & Substitute Parts

Part Overview

The SM8S22A-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 22V reverse standoff voltage with 35.5V maximum clamping voltage and 186A peak pulse current capability, suitable for automotive-grade transient protection circuits.

The SM8S22A-TP carries a "Not For New Designs" product status, making identification of equivalent substitute parts essential for ongoing production and design continuity. Active alternative components with identical electrical specifications are available to ensure supply chain reliability and design flexibility.

Substiute Parts

SM8S22A-TP

Micro Commercial CoIn Stock: 6094SM8S22A-TP Datasheet

Current PartRFQ

SLD8S22A

LittelfuseIn Stock: 5955SLD8S22A Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the SM8S22A-TP is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff: 22V (identical)
• Voltage - Clamping (Max) @ Ipp: 35.5V (identical)
• Unidirectional Zener topology with single channel
• Automotive-grade qualification (AEC-Q101)
• Operating temperature range: -55°C to 175°C
• Surface mount technology with compatible package footprint
• ROHS3 compliance and MSL 1 rating

The SLD8S22A from Littelfuse meets all substitution criteria with matching electrical specifications and automotive qualification. Package differences (DO-218AB versus SMTO-263) represent alternative surface mount configurations suitable for equivalent PCB integration.

Parameter Comparison

Engineering Selection Recommendations

The SLD8S22A qualifies as a direct functional equivalent to the SM8S22A-TP based on matching voltage specifications, automotive-grade AEC-Q101 qualification, and identical operating temperature range. The SLD8S22A maintains active product status, ensuring long-term supply availability and design continuity.

The SLD8S22A demonstrates superior peak pulse current (197A versus 186A) and peak pulse power (7000W versus 6600W) ratings, providing additional margin in transient protection applications. Both components maintain ROHS3 compliance and MSL 1 moisture sensitivity classification.

Package selection between DO-218AB and SMTO-263 depends on PCB layout requirements and footprint compatibility. Both packages are surface mount configurations suitable for automated assembly processes. Verify footprint compatibility with existing PCB designs before implementation.

Frequently Asked Questions (FAQ)

Q: Can the SLD8S22A replace the SM8S22A-TP in existing designs?

A: Yes. The SLD8S22A provides identical voltage specifications (22V standoff, 35.5V clamping), matching automotive qualification (AEC-Q101), and equivalent operating temperature range (-55°C to 175°C). Package differences require PCB footprint verification.

Q: What is the difference between DO-218AB and SMTO-263 packages?

A: Both are surface mount packages for TVS diodes. DO-218AB and SMTO-263 represent different manufacturer package designations. Verify PCB pad layout and component placement requirements before selecting either package variant.

Q: Are the higher current and power ratings of the SLD8S22A significant?

A: The SLD8S22A provides 197A peak pulse current and 7000W peak pulse power compared to the SM8S22A-TP specifications of 186A and 6600W. These higher ratings offer additional design margin but do not affect functional equivalence for applications designed to the SM8S22A-TP specifications.

Q: Do both parts meet automotive compliance requirements?

A: Yes. Both the SM8S22A-TP and SLD8S22A carry automotive-grade classification with AEC-Q101 qualification, ROHS3 compliance, and MSL 1 moisture sensitivity rating.

Q: What should be verified when switching from SM8S22A-TP to SLD8S22A?

A: Verify PCB footprint compatibility with the SMTO-263 package, confirm component placement clearances, and validate solder reflow profiles for the alternative package geometry. Electrical performance remains equivalent across both components.