TPSMA33HE3_A/I Equivalent & Substitute Parts

Part Overview

The TPSMA33HE3_A/I is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, designed for surface mount applications in the DO-214AC (SMA) package. This component operates across an automotive-grade temperature range of -65°C to 185°C and meets AEC-Q101 qualification standards. The part is currently listed as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and procurement continuity.

Substiute Parts

TPSMA33HE3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 729TPSMA33HE3_A/I Datasheet

Current PartRFQ

TPSMA33AHE3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1159TPSMA33AHE3_B/I Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TPSMA33HE3_A/I is determined by strict alignment of the following electrical and mechanical parameters:

• Voltage - Reverse Standoff (Typ): Must remain within the 26.8V specification to maintain circuit protection thresholds
• Voltage - Clamping (Max) @ Ipp: Must not exceed 47V to ensure adequate transient suppression
• Current - Peak Pulse (10/1000µs): Must support minimum 8.4A to handle specified surge conditions
• Power - Peak Pulse: Must sustain 400W dissipation capability
• Operating Temperature Range: Must cover -65°C to 185°C (TJ) for automotive applications
• Package / Case: Must be DO-214AC (SMA) for mechanical and thermal compatibility
• Mounting Type: Must be Surface Mount for PCB integration
• Grade and Qualification: Must maintain Automotive grade and AEC-Q101 certification

The TPSMA33AHE3_B/I meets these substitution criteria with compatible electrical performance and identical package specifications.

Parameter Comparison

Engineering Selection Recommendations

The TPSMA33AHE3_B/I is a direct functional substitute for the obsolete TPSMA33HE3_A/I. Both components share identical automotive-grade classification and AEC-Q101 qualification, ensuring compliance with automotive reliability standards. The substitute part is currently in active production status, providing supply continuity and long-term availability.

Electrical performance differences are minimal and within acceptable tolerance bands for TVS diode applications. The TPSMA33AHE3_B/I exhibits a slightly higher reverse standoff voltage (28.2V vs. 26.8V) and improved peak pulse current capability (8.8A vs. 8.4A), while maintaining equivalent clamping voltage performance. Both parts are packaged identically in DO-214AC (SMA) format and support the same surface mount assembly processes.

Selection of the TPSMA33AHE3_B/I is supported by equivalent RoHS3 compliance, identical moisture sensitivity level (MSL 1), and matching REACH and ECCN classifications.

Frequently Asked Questions (FAQ)

Q: Can the TPSMA33AHE3_B/I be used as a direct replacement for the TPSMA33HE3_A/I?

A: Yes. Both parts meet identical electrical performance requirements within the specified parameter ranges, share the same DO-214AC (SMA) package, and maintain equivalent automotive-grade certification and AEC-Q101 qualification.

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

A: The TPSMA33AHE3_B/I has a slightly higher reverse standoff voltage (28.2V vs. 26.8V) and improved peak pulse current rating (8.8A vs. 8.4A). The clamping voltage is marginally lower (45.7V vs. 47V). These differences remain within acceptable substitution tolerances for TVS diode applications.

Q: Are there any package or mounting differences?

A: No. Both parts use the DO-214AC (SMA) package and are configured for surface mount assembly. PCB footprints and reflow profiles are identical.

Q: Does the TPSMA33AHE3_B/I maintain automotive compliance?

A: Yes. The substitute part carries Automotive grade classification and AEC-Q101 qualification, matching the original part's compliance profile.

Q: What is the availability status of each part?

A: The TPSMA33HE3_A/I is obsolete with limited remaining inventory. The TPSMA33AHE3_B/I is in active production, providing reliable long-term supply availability.