TPSMC20HE3_A/I Equivalent & Substitute Parts

Part Overview

The TPSMC20HE3_A/I is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This component is designed for surface mount applications in automotive-grade circuits requiring transient voltage protection. The part operates with a reverse standoff voltage of 16.2V and provides clamping at 29.1V with peak pulse current handling of 51.5A. Due to its obsolete product status, identifying functionally equivalent alternatives is necessary for ongoing design support and procurement continuity.

Substiute Parts

TPSMC20HE3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 964TPSMC20HE3_A/I Datasheet

Current PartRFQ

TPSMC20AHE3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 4388TPSMC20AHE3_B/I Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TPSMC20HE3_A/I is determined by the following critical parameters:

• Package Compatibility: Both parts must use DO-214AB (SMC) surface mount package for mechanical and thermal compatibility
• Electrical Classification: Both must be unidirectional Zener-type TVS diodes with single channel configuration
• Voltage Range: Reverse standoff voltage and clamping voltage must fall within acceptable operating margins for the protected circuit
• Current Handling: Peak pulse current rating must meet or exceed the transient protection requirements
• Power Dissipation: Peak pulse power rating must support the same thermal environment
• Automotive Compliance: Both parts must maintain AEC-Q101 qualification and automotive-grade designation
• Environmental Specifications: Operating temperature range and RoHS compliance must be equivalent or superior

The TPSMC20AHE3_B/I qualifies as a direct substitute based on these parameters. While minor variations exist in reverse standoff voltage (17.1V vs 16.2V) and clamping voltage (27.7V vs 29.1V), these differences remain within acceptable engineering tolerances for TVS diode substitution in automotive applications.

Parameter Comparison

Engineering Selection Recommendations

The TPSMC20AHE3_B/I is the qualified substitute for the obsolete TPSMC20HE3_A/I. Selection is supported by the following factors:

Product Status: The substitute part maintains Active product status, ensuring long-term availability and manufacturing support compared to the obsolete main part.

Compliance and Certification: Both parts carry identical automotive-grade designation and AEC-Q101 qualification, meeting the same regulatory and quality standards required for automotive applications.

Packaging and Mounting: Identical DO-214AB (SMC) package specification ensures direct mechanical and thermal compatibility without PCB redesign.

Electrical Performance: The substitute delivers equivalent peak pulse power dissipation (1500W) and superior peak pulse current capability (54.2A vs 51.5A). Voltage parameters remain within acceptable operating margins for TVS diode applications.

Environmental Compliance: Both parts maintain identical operating temperature range (-65°C to 185°C) and ROHS3 compliance status.

Frequently Asked Questions (FAQ)

Q: Can TPSMC20AHE3_B/I be used as a direct replacement for TPSMC20HE3_A/I without circuit modification?

A: Yes. Both parts share identical package specifications (DO-214AB/SMC), mounting type (surface mount), and electrical classification (unidirectional Zener TVS). The voltage and current parameters are compatible for automotive transient protection applications.

Q: What are the key differences between these two parts?

A: The substitute part features a slightly higher reverse standoff voltage (17.1V vs 16.2V) and lower clamping voltage (27.7V vs 29.1V), with marginally higher peak pulse current capability (54.2A vs 51.5A). These differences remain within acceptable tolerances for TVS diode substitution.

Q: Why is the main part listed as obsolete?

A: Product obsolescence indicates that the TPSMC20HE3_A/I is no longer in active production. The TPSMC20AHE3_B/I represents the current active equivalent from the same manufacturer and product family.

Q: Are there any packaging differences between these parts?

A: The main part uses DO-214AB (SMCJ) packaging, while the substitute uses DO-214AB (SMC) packaging. Both designations refer to the same physical package format suitable for surface mount assembly.

Q: Do both parts meet automotive qualification requirements?

A: Yes. Both parts carry AEC-Q101 qualification and automotive-grade designation, meeting identical automotive industry standards and reliability requirements.

Q: What is the inventory status of the substitute part?

A: The TPSMC20AHE3_B/I maintains active inventory status with 4289 pieces available as new original stock, compared to 895 pieces for the obsolete main part.