TPSMA36HE3/5AT Equivalent & Substitute Parts

Part Overview

The TPSMA36HE3/5AT 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 overvoltage protection with a 29.1V reverse standoff voltage and 52V maximum clamping voltage. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and procurement.

Substiute Parts

TPSMA36HE3/5AT

Vishay General Semiconductor - Diodes DivisionIn Stock: 966TPSMA36HE3/5AT Datasheet

Current PartRFQ

PTVS33VS1UR,115

Nexperia USA Inc.In Stock: 18980PTVS33VS1UR,115 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TPSMA36HE3/5AT is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Unidirectional TVS diode topology (single channel)
• Reverse standoff voltage range: 29.1V nominal (allows tolerance variation in active substitutes)
• Clamping voltage maximum: 52V or lower
• Peak pulse current capability: 7.5A or higher
• Peak pulse power rating: 400W or higher
• Zener diode type classification

Mechanical Compatibility Criteria:

• Surface mount package technology
• Automotive grade qualification (AEC-Q101)
• RoHS3 compliance
• MSL rating of 1 (Unlimited)

The substitute part PTVS33VS1UR,115 meets these criteria with equivalent electrical performance and automotive qualification, though it operates in a different package form factor (SOD-123W versus DO-214AC).

Parameter Comparison

Engineering Selection Recommendations

The PTVS33VS1UR,115 is the manufacturer-recommended substitute for the obsolete TPSMA36HE3/5AT. Both components maintain AEC-Q101 automotive qualification and ROHS3 compliance, ensuring regulatory continuity for automotive applications.

The substitute part demonstrates active product status with higher inventory availability (18,960 pcs versus 872 pcs), providing supply chain stability. Electrical performance is equivalent within the specified tolerance ranges: clamping voltage differential is 1.3V (52V to 53.3V), and peak pulse current is within 0.2A (7.7A to 7.5A). Both components are rated for 400W peak pulse power.

The primary design consideration is package form factor transition from DO-214AC (SMA) to SOD-123W. This change requires PCB layout modification and may affect thermal management characteristics due to different package geometries. The operating temperature range of the substitute is narrower (-55°C to 150°C versus -65°C to 185°C), which must be evaluated against specific application requirements.

Frequently Asked Questions (FAQ)

Q: Can PTVS33VS1UR,115 directly replace TPSMA36HE3/5AT without PCB modification?

A: No. The substitute uses SOD-123W package versus the original DO-214AC (SMA) package. PCB footprint, pad layout, and component placement must be redesigned. Thermal performance may differ due to package geometry variations.

Q: What is the voltage difference between these parts?

A: The PTVS33VS1UR,115 has a 3.9V higher reverse standoff voltage (33V versus 29.1V) and 4.3V higher breakdown minimum (36.7V versus 32.4V). Clamping voltage is 1.3V higher (53.3V versus 52V). These differences remain within acceptable TVS diode tolerance ranges for equivalent circuit protection.

Q: Are both parts automotive qualified?

A: Yes. Both TPSMA36HE3/5AT and PTVS33VS1UR,115 carry AEC-Q101 qualification and are rated for automotive applications. Both are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity.

Q: Why is the original part obsolete?

A: The TPSMA36HE3/5AT is classified as obsolete by Vishay. The PTVS33VS1UR,115 is the active equivalent from Nexperia, indicating industry transition to this alternative design.

Q: What is the temperature operating range difference?

A: TPSMA36HE3/5AT operates from -65°C to 185°C (junction temperature). PTVS33VS1UR,115 operates from -55°C to 150°C (ambient temperature). Applications requiring operation below -55°C or above 150°C must evaluate compatibility with the substitute's narrower range.

Q: Is peak pulse current capacity sufficient?

A: Yes. The substitute provides 7.5A peak pulse current versus the original 7.7A. This 0.2A difference is negligible for TVS diode applications and both maintain 400W peak pulse power rating.