TPSMC27HE3_A/I Equivalent & Substitute Parts

Part Overview

The TPSMC27HE3_A/I is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This component is designed for surface mount applications in the DO-214AB (SMCJ) package and provides transient overvoltage protection with a 21.8V reverse standoff voltage and 39.1V maximum clamping voltage. The part is currently listed as obsolete, making identification of suitable substitute components essential for ongoing design support and procurement.

Substiute Parts

TPSMC27HE3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1143TPSMC27HE3_A/I Datasheet

Current PartRFQ

TPSMC27AHE3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1009TPSMC27AHE3_B/I Datasheet

DirectRFQ

SMCJ24A

EVVO SemiIn Stock: 955149SMCJ24A Datasheet

MFR RecommendedRFQ

SMCJ24A

EVVO SemiIn Stock: 955149SMCJ24A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TPSMC27HE3_A/I is determined by the following critical parameters:

Primary Substitution Criteria:

• Unidirectional Zener TVS diode type
• Reverse standoff voltage within the 21.8V nominal specification
• Clamping voltage performance at peak pulse current
• Peak pulse current capability (10/1000µs waveform)
• Peak pulse power dissipation capacity
• Surface mount package compatibility (DO-214AB or equivalent)
• Operating temperature range support (-65°C minimum to 185°C maximum)
• Automotive grade qualification (AEC-Q101)
• RoHS3 compliance

The substitute parts identified maintain functional equivalence through matching or exceeding the electrical performance envelope while preserving package compatibility and automotive qualification requirements.

Parameter Comparison

Engineering Selection Recommendations

TPSMC27AHE3_B/I (Vishay) is the primary substitute for TPSMC27HE3_A/I. Both components share identical manufacturer lineage, automotive grade qualification (AEC-Q101), matching operating temperature range (-65°C to 185°C), and equivalent peak pulse power rating (1500W). The TPSMC27AHE3_B/I maintains the same DO-214AB (SMC) package footprint and is currently in active production status. Electrical parameters remain within acceptable tolerance: reverse standoff voltage increases from 21.8V to 23.1V, clamping voltage decreases from 39.1V to 37.5V, and peak pulse current increases from 38.4A to 40A. These variations remain within the functional envelope for TVS diode substitution.

SMCJ24A (EVVO Semi) serves as an alternative substitute with comparable electrical performance. This component maintains the unidirectional Zener TVS classification, RoHS3 compliance, and surface mount configuration. However, the SMCJ24A operates within a reduced temperature range (-65°C to 150°C maximum junction temperature) and provides lower peak pulse power dissipation (600W versus 1500W). The package designation shifts from DO-214AB (SMC) to DO-214AC (SMA), requiring PCB layout verification for mechanical compatibility. The absence of specified automotive grade and AEC-Q101 qualification should be evaluated against application requirements.

For applications requiring full automotive qualification and maximum thermal performance, TPSMC27AHE3_B/I is the recommended selection. For general-purpose applications with relaxed thermal and qualification requirements, SMCJ24A provides functional equivalence with extended inventory availability.

Frequently Asked Questions (FAQ)

Q: Can TPSMC27AHE3_B/I be used as a direct replacement for TPSMC27HE3_A/I?

A: Yes. Both components are Vishay PAR® series unidirectional Zener TVS diodes with identical DO-214AB (SMC) package footprints, matching automotive grade qualification (AEC-Q101), and equivalent operating temperature ranges (-65°C to 185°C). Electrical parameters remain within acceptable substitution tolerance for TVS applications.

Q: What is the primary difference between TPSMC27AHE3_B/I and SMCJ24A?

A: TPSMC27AHE3_B/I maintains full automotive qualification (AEC-Q101) and 1500W peak pulse power rating. SMCJ24A provides 600W peak pulse power, operates at a reduced maximum junction temperature (150°C), and lacks specified automotive grade certification. Package designation also differs: TPSMC27AHE3_B/I uses DO-214AB (SMC), while SMCJ24A uses DO-214AC (SMA).

Q: Are there package compatibility concerns when substituting SMCJ24A?

A: Yes. SMCJ24A uses the DO-214AC (SMA) package, while the original TPSMC27HE3_A/I uses DO-214AB (SMC). Although both are surface mount packages, physical dimensions and PCB footprints differ. PCB layout verification is required before implementation.

Q: Does the increase in reverse standoff voltage from 21.8V to 23.1V affect circuit performance?

A: The 1.3V increase in reverse standoff voltage (TPSMC27AHE3_B/I) remains within acceptable TVS diode substitution parameters. This variation reflects normal manufacturing tolerance across the PAR® series and does not compromise transient suppression functionality for circuits designed around the 21.8V nominal specification.

Q: Which substitute part should be selected for automotive applications?

A: TPSMC27AHE3_B/I is the appropriate selection for automotive applications. This component maintains AEC-Q101 qualification, automotive grade designation, and the full 1500W peak pulse power rating required for robust transient protection in automotive environments.