Equivalent & Substitute Parts for TPC43HM3/87A

Part Overview

The TPC43HM3/87A is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This component is designed for transient overvoltage protection in automotive applications, featuring 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 production continuity.

Substiute Parts

TPC43HM3/87A

Vishay General Semiconductor - Diodes DivisionIn Stock: 1087TPC43HM3/87A Datasheet

Current PartRFQ

TPC43AHM3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 691TPC43AHM3_A/I Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TPC43HM3/87A is determined by strict equivalence across the following critical parameters:

Mandatory Matching Criteria:

• Unidirectional channel configuration (1 channel)
• Zener diode type classification
• Automotive grade qualification with AEC-Q101 certification
• Surface mount mounting type with TO-277A (SMPC) package compatibility
• Operating temperature range of -65°C to 185°C (TJ)
• ROHS3 compliance and REACH unaffected status
• Peak pulse power rating of 1500W

Allowable Parameter Variance:

• Voltage - Reverse Standoff (Typ): ±2V tolerance
• Voltage - Breakdown (Min): ±2V tolerance
• Voltage - Clamping (Max) @ Ipp: ±3V tolerance
• Current - Peak Pulse (10/1000µs): ±1.5A tolerance

The TPC43AHM3_A/I meets all mandatory criteria and falls within allowable variance for electrical parameters, establishing it as a direct substitute for the obsolete TPC43HM3/87A.

Parameter Comparison

Engineering Selection Recommendations

The TPC43AHM3_A/I is the qualified substitute for the obsolete TPC43HM3/87A. Both components share identical automotive grade classification and AEC-Q101 qualification, ensuring compliance with automotive industry standards. The substitute maintains the same operating temperature range, package configuration, and regulatory compliance status (ROHS3 and REACH unaffected).

The TPC43AHM3_A/I carries active product status, providing long-term availability and supply chain continuity compared to the obsolete main part. Electrical parameter variations between the two components fall within acceptable engineering tolerances for TVS diode applications. The substitute's higher peak pulse current rating (25.3A versus 24.2A) and lower clamping voltage (59.3V versus 61.9V) represent improved performance characteristics within the same power dissipation envelope.

Frequently Asked Questions (FAQ)

Q: Can TPC43AHM3_A/I be used as a direct replacement for TPC43HM3/87A in existing designs?

A: Yes. Both components are unidirectional Zener TVS diodes with identical package configurations (TO-277A SMPC), operating temperature ranges, and automotive qualifications. Electrical parameters are within acceptable substitution tolerances for TVS applications.

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

A: The TPC43AHM3_A/I has a higher reverse standoff voltage (36.8V versus 34.8V), higher breakdown voltage (40.9V versus 38.7V), lower clamping voltage (59.3V versus 61.9V), and higher peak pulse current capability (25.3A versus 24.2A). The substitute maintains active product status while the original is obsolete.

Q: Are there any packaging or mounting differences?

A: No. Both components use identical TO-277A (SMPC) surface mount packages with the same 3-PowerDFN case designation. PCB layout and assembly processes require no modification.

Q: Do both parts meet automotive compliance requirements?

A: Yes. Both the TPC43HM3/87A and TPC43AHM3_A/I are automotive grade components with AEC-Q101 qualification, ROHS3 compliance, and REACH unaffected status.

Q: Why is the original part obsolete?

A: The TPC43HM3/87A is classified as obsolete by the manufacturer. The TPC43AHM3_A/I represents the active continuation of this product line with equivalent electrical performance and improved availability.