SM8S14ATHE3/I Equivalent & Substitute Parts

Part Overview

The SM8S14ATHE3/I is an automotive-grade transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This unidirectional zener diode is designed for surface mount applications in the DO-218AC package and provides transient overvoltage protection with a 14V reverse standoff voltage and 23.2V maximum clamping voltage. The part is active in production status with AEC-Q101 automotive qualification and ROHS3 compliance. Equivalent substitute parts are identified to support supply chain continuity and design flexibility while maintaining electrical and mechanical compatibility.

Substiute Parts

SM8S14ATHE3/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1125SM8S14ATHE3/I Datasheet

Current PartRFQ

SLD8S14A

Littelfuse Inc.In Stock: 1762SLD8S14A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SM8S14ATHE3/I are identified based on strict electrical and mechanical compatibility criteria. The following parameters define acceptable substitution:

• Voltage - Reverse Standoff (Typ): 14V
• Voltage - Breakdown (Min): 15.6V
• Voltage - Clamping (Max) @ Ipp: 23.2V
• Current - Peak Pulse (10/1000µs): 284A minimum
• Operating Temperature Range: -55°C to 175°C (TJ)
• Grade: Automotive
• Qualification: AEC-Q101
• Type: Unidirectional Zener

The SLD8S14A from Littelfuse Inc. meets all critical electrical parameters and maintains automotive-grade qualification with AEC-Q101 certification. While the package designation differs (SMTO-263 versus DO-218AC), both are surface mount configurations suitable for equivalent circuit board integration.

Parameter Comparison

Engineering Selection Recommendations

Both the SM8S14ATHE3/I and SLD8S14A are active production parts with automotive-grade qualification and AEC-Q101 certification, meeting the same regulatory and quality standards. The SLD8S14A provides equivalent or superior electrical performance with higher peak pulse current (301A versus 284A) and peak pulse power (7000W versus 6600W) while maintaining identical voltage specifications.

Selection between these parts should be based on package footprint compatibility with the circuit board design. The SM8S14ATHE3/I uses the DO-218AC package, while the SLD8S14A uses the SMTO-263 package. Both are surface mount configurations; however, physical dimensions and land pattern requirements differ and must be verified against the specific PCB layout.

Frequently Asked Questions (FAQ)

Q: Can the SLD8S14A replace the SM8S14ATHE3/I in an existing design?

A: Electrical substitution is valid based on matching voltage specifications (14V standoff, 15.6V breakdown, 23.2V clamping) and automotive qualification. Package compatibility must be confirmed; the SMTO-263 package has different physical dimensions than DO-218AC, requiring PCB layout verification.

Q: What are the key parameters that determine substitution eligibility?

A: Critical parameters are reverse standoff voltage (14V), breakdown voltage (15.6V), clamping voltage (23.2V), peak pulse current rating (minimum 284A), operating temperature range (-55°C to 175°C), automotive grade, and AEC-Q101 qualification.

Q: Are both parts RoHS compliant?

A: Yes, both SM8S14ATHE3/I and SLD8S14A are ROHS3 compliant with MSL rating of 1 (Unlimited).

Q: What is the difference in peak pulse performance between these parts?

A: The SLD8S14A provides higher peak pulse current (301A versus 284A) and peak pulse power (7000W versus 6600W), offering enhanced transient suppression capability while maintaining identical voltage clamping characteristics.

Q: Do both parts have the same moisture sensitivity rating?

A: Yes, both parts have MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions for storage and handling.