TPSMA43HE3_A/I Equivalent & Substitute Parts

Part Overview

The TPSMA43HE3_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 the DO-214AC (SMA) package and provides transient voltage protection with a 34.8V reverse standoff voltage and 61.9V maximum clamping voltage. The part is classified as Obsolete, making identification of suitable substitute components essential for ongoing design support and procurement.

Substiute Parts

TPSMA43HE3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1192TPSMA43HE3_A/I Datasheet

Current PartRFQ

TPSMA43AHE3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1139TPSMA43AHE3_B/I Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TPSMA43HE3_A/I is determined by strict adherence to the following electrical and mechanical parameters:

Critical Substitution Criteria:

• Package / Case: DO-214AC (SMA) surface mount configuration
• Unidirectional Channels: 1 channel only
• Type: Zener diode classification
• Voltage - Reverse Standoff (Typ): 34.8V nominal operating point
• Voltage - Breakdown (Min): Minimum 38.7V threshold
• Voltage - Clamping (Max) @ Ipp: Maximum 61.9V at peak pulse current
• Current - Peak Pulse (10/1000µs): 6.5A minimum capability
• Power - Peak Pulse: 400W dissipation rating
• Operating Temperature Range: -65°C ~ 185°C (TJ)
• Grade: Automotive classification
• Qualification: AEC-Q101 compliance

The substitute part TPSMA43AHE3_B/I meets all mechanical and electrical parameter requirements within the specified tolerances while maintaining Active product status and full automotive qualification.

Parameter Comparison

Engineering Selection Recommendations

The TPSMA43AHE3_B/I is the qualified substitute for the obsolete TPSMA43HE3_A/I. Both components share identical mechanical compatibility (DO-214AC SMA package), automotive grade classification, and AEC-Q101 qualification. The substitute maintains equivalent thermal operating range (-65°C ~ 185°C) and power dissipation capability (400W peak pulse).

The TPSMA43AHE3_B/I carries Active product status, ensuring long-term availability and supply chain continuity. Both parts comply with ROHS3 and maintain MSL 1 (Unlimited) moisture sensitivity classification. The substitute is supplied in Tape & Reel (TR) packaging format, standard for high-volume surface mount assembly operations.

Frequently Asked Questions (FAQ)

Q: Can TPSMA43AHE3_B/I be used as a direct replacement for TPSMA43HE3_A/I?

A: Yes. Both components are unidirectional Zener TVS diodes in identical DO-214AC (SMA) surface mount packages with matching mechanical footprints, thermal ranges, and power ratings. Electrical parameters remain within compatible operating margins for transient voltage suppression applications.

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

A: The TPSMA43AHE3_B/I exhibits a slightly higher reverse standoff voltage (36.8V vs. 34.8V) and breakdown voltage (40.9V vs. 38.7V), with a marginally lower clamping voltage (59.3V vs. 61.9V). Peak pulse current capability is slightly higher (6.7A vs. 6.5A). These variations remain within the functional tolerance band for TVS diode substitution.

Q: Are both parts automotive qualified?

A: Yes. Both TPSMA43HE3_A/I and TPSMA43AHE3_B/I carry Automotive grade classification and AEC-Q101 qualification, meeting automotive industry reliability and quality standards.

Q: What is the packaging difference?

A: The original part (TPSMA43HE3_A/I) packaging format is not specified in available data. The substitute (TPSMA43AHE3_B/I) is supplied in Tape & Reel (TR) format, standard for automated surface mount assembly. Both use identical DO-214AC (SMA) component packages.

Q: Why is the original part obsolete?

A: Product obsolescence is determined by manufacturer lifecycle decisions. The TPSMA43AHE3_B/I maintains Active status, providing a current-generation alternative with equivalent functional performance.