TPSMP33A-E3/84A Equivalent & Substitute Parts

Part Overview

The TPSMP33A-E3/84A is a unidirectional Zener-type transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. Designed for general-purpose overvoltage protection applications, this component features a 28.2V reverse standoff voltage and 45.7V maximum clamping voltage with 8.8A peak pulse current capability in a surface-mount DO-220AA package.

The product is currently classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance requirements for systems utilizing this component.

Substiute Parts

TPSMP33A-E3/84A

Vishay General Semiconductor - Diodes DivisionIn Stock: 1036TPSMP33A-E3/84A Datasheet

Current PartRFQ

PTVS28VS1UR,115

Nexperia USA Inc.In Stock: 18807PTVS28VS1UR,115 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TPSMP33A-E3/84A is determined by the following critical parameters:

• Voltage - Reverse Standoff: 28V to 28.2V (nominal tolerance)
• Voltage - Clamping (Max) @ Ipp: 45.4V to 45.7V (within acceptable clamping range)
• Current - Peak Pulse (10/1000µs): 8.8A (exact match required)
• Power - Peak Pulse: 400W (exact match required)
• Type: Zener, Unidirectional (functional equivalence)
• Mounting Type: Surface Mount (assembly compatibility)
• RoHS Compliance: ROHS3 Compliant (regulatory alignment)

The PTVS28VS1UR,115 manufactured by Nexperia USA Inc. meets these substitution criteria. While the package format differs (SOD-123W versus DO-220AA), the electrical performance parameters and functional characteristics align within acceptable engineering tolerances for TVS diode applications.

Parameter Comparison

Engineering Selection Recommendations

The PTVS28VS1UR,115 is the manufacturer-recommended substitute for the TPSMP33A-E3/84A. Both components maintain ROHS3 compliance and equivalent electrical performance across all critical parameters. The Nexperia component carries active product status with AEC-Q101 automotive qualification, ensuring ongoing availability and supply chain support.

Selection of the PTVS28VS1UR,115 is appropriate for applications requiring equivalent overvoltage protection performance. The package transition from DO-220AA to SOD-123W requires PCB layout and footprint modification but does not affect electrical functionality or performance characteristics.

Frequently Asked Questions (FAQ)

Q: Can the PTVS28VS1UR,115 directly replace the TPSMP33A-E3/84A without circuit modification?

A: Electrical substitution is valid. The components share identical peak pulse current (8.8A), power dissipation (400W), and clamping voltage characteristics (45.4V to 45.7V). PCB footprint and layout changes are required due to package format differences (SOD-123W versus DO-220AA).

Q: What is the significance of the package change from DO-220AA to SOD-123W?

A: Package format affects PCB land pattern, component placement, and thermal management characteristics. DO-220AA and SOD-123W are distinct surface-mount packages with different dimensional specifications. Design verification and PCB layout updates are necessary for implementation.

Q: Are there compliance or certification differences between these components?

A: Both components are ROHS3 compliant. The PTVS28VS1UR,115 carries AEC-Q101 automotive qualification, indicating additional reliability and quality assurance testing. The TPSMP33A-E3/84A is classified as obsolete, while the Nexperia component maintains active product status.

Q: What are the operating temperature differences?

A: The TPSMP33A-E3/84A operates from -65°C to 185°C (junction temperature). The PTVS28VS1UR,115 operates from -55°C to 150°C (ambient temperature). Applications requiring operation below -55°C or above 150°C may require additional thermal analysis or alternative component selection.

Q: Is the voltage performance equivalent between these parts?

A: Yes. Reverse standoff voltage is 28.2V (Vishay) versus 28V (Nexperia), representing a 0.2V difference within acceptable tolerance. Clamping voltage is 45.7V (Vishay) versus 45.4V (Nexperia), a 0.3V difference. Both components maintain functional equivalence for 28V protection applications.