TPSMA20HE3/5AT Equivalent & Substitute Parts

Part Overview

The TPSMA20HE3/5AT 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 voltage protection with a 16.2V reverse standoff voltage and 29.1V maximum clamping voltage. The part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement.

Substiute Parts

TPSMA20HE3/5AT

Vishay General Semiconductor - Diodes DivisionIn Stock: 4383TPSMA20HE3/5AT Datasheet

Current PartRFQ

PTVS17VS1UR,115

Nexperia USA Inc.In Stock: 18841PTVS17VS1UR,115 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TPSMA20HE3/5AT is determined by the following critical electrical and mechanical parameters:

• Unidirectional TVS diode topology with single channel configuration
• Voltage rating compatibility: Reverse standoff voltage within acceptable tolerance of 16.2V nominal
• Breakdown voltage minimum threshold of 18V or higher
• Clamping voltage performance at rated peak pulse current
• Peak pulse current capability of 13.7A or greater at 10/1000µs pulse width
• Power dissipation rating of 400W peak pulse
• Surface mount packaging suitable for automated assembly
• Automotive grade qualification with AEC-Q101 certification
• Operating temperature range compatibility
• RoHS3 compliance for environmental standards

The PTVS17VS1UR,115 meets these substitution criteria through equivalent electrical performance and automotive qualification, despite differences in package form factor and manufacturer.

Parameter Comparison

Engineering Selection Recommendations

The PTVS17VS1UR,115 is an active product substitute for the obsolete TPSMA20HE3/5AT. Both components maintain automotive grade classification with AEC-Q101 qualification and ROHS3 compliance. The substitute part demonstrates equivalent peak pulse power dissipation (400W) and superior peak pulse current capability (14.5A versus 13.7A). The clamping voltage of the substitute (27.6V) is lower than the original part (29.1V), providing improved transient suppression performance. Operating temperature range differs, with the original part supporting extended junction temperature operation (-65°C to 185°C TJ) compared to the substitute's ambient temperature range (-55°C to 150°C TA). Package form factor differs between DO-214AC (SMA) and SOD-123W, requiring PCB layout modification. Active product status of the substitute ensures ongoing availability and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can the PTVS17VS1UR,115 directly replace the TPSMA20HE3/5AT without PCB modification?

A: No. The substitute part uses SOD-123W package while the original uses DO-214AC (SMA) package. PCB footprint redesign is required for component placement and soldering.

Q: Are the voltage ratings compatible between these parts?

A: The parts are compatible within the application context. The PTVS17VS1UR,115 has a 17V reverse standoff voltage (versus 16.2V) and 27.6V clamping voltage (versus 29.1V). The lower clamping voltage provides superior transient suppression. Breakdown voltage minimums (18.9V versus 18V) are within acceptable tolerance.

Q: What is the significance of the product status difference?

A: The TPSMA20HE3/5AT is obsolete, meaning Vishay has discontinued production and support. The PTVS17VS1UR,115 is active, ensuring continued availability, technical support, and supply chain reliability from Nexperia.

Q: Do both parts meet automotive qualification requirements?

A: Yes. Both components are automotive grade with AEC-Q101 qualification and ROHS3 compliance, suitable for automotive applications.

Q: How does the operating temperature range affect substitution?

A: The original part supports higher junction temperature operation (-65°C to 185°C TJ). The substitute operates at -55°C to 150°C (TA). Application thermal requirements must be evaluated to confirm compatibility.

Q: Is the higher peak pulse current of the substitute beneficial?

A: Yes. The PTVS17VS1UR,115 provides 14.5A peak pulse current versus 13.7A, offering additional margin for transient current handling within the same 400W power dissipation rating.