TPC43HM3/86A Equivalent & Substitute Parts

Part Overview

The TPC43HM3/86A 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 compatible substitutes essential for ongoing system support and new design implementations where equivalent performance is required.

Substiute Parts

TPC43HM3/86A

Vishay General Semiconductor - Diodes DivisionIn Stock: 941TPC43HM3/86A Datasheet

Current PartRFQ

TPC43AHM3_A/H

Vishay General Semiconductor - Diodes DivisionIn Stock: 852TPC43AHM3_A/H Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TPC43HM3/86A is determined by the following critical parameters:

Mandatory Matching Criteria:

• Unidirectional Zener TVS diode topology (1 channel)
• Reverse standoff voltage range: 34.8V nominal
• Breakdown voltage minimum: 38.7V or higher
• Clamping voltage maximum: 61.9V or lower
• Peak pulse current capability: 24.2A or higher
• Peak pulse power rating: 1500W minimum
• Operating temperature range: -65°C to 185°C (TJ)
• Automotive grade qualification (AEC-Q101)
• Surface mount package: TO-277A (SMPC) / TO-277, 3-PowerDFN
• RoHS3 compliance

The substitute part TPC43AHM3_A/H meets all mandatory criteria while maintaining functional equivalence within the specified electrical and mechanical parameters.

Parameter Comparison

Engineering Selection Recommendations

The TPC43AHM3_A/H is a direct functional substitute for the obsolete TPC43HM3/86A. Both components share identical automotive qualification (AEC-Q101), RoHS3 compliance status, and thermal operating range. The substitute maintains equivalent peak pulse power handling (1500W) and exceeds the minimum peak pulse current requirement (25.3A vs. 24.2A).

The primary advantage of selecting TPC43AHM3_A/H is its active product status, ensuring long-term availability and supply chain continuity. The substitute's clamping voltage (59.3V maximum) is lower than the main part (61.9V maximum), providing enhanced transient suppression performance. The reverse standoff voltage differential (36.8V vs. 34.8V) and breakdown voltage increase (40.9V vs. 38.7V) remain within acceptable operating margins for automotive TVS applications.

Both components are packaged identically in TO-277A (SMPC) format, enabling direct board-level substitution without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can TPC43AHM3_A/H be used as a direct replacement for TPC43HM3/86A?

A: Yes. Both components are unidirectional Zener TVS diodes with identical package geometry (TO-277A SMPC), thermal range (-65°C to 185°C), automotive qualification (AEC-Q101), and peak pulse power rating (1500W). The substitute meets or exceeds all electrical performance requirements.

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

A: The TPC43AHM3_A/H has a higher reverse standoff voltage (36.8V vs. 34.8V), higher breakdown voltage minimum (40.9V vs. 38.7V), lower clamping voltage maximum (59.3V vs. 61.9V), and higher peak pulse current capability (25.3A vs. 24.2A). These differences result in improved transient suppression performance.

Q: Are there packaging or mounting differences?

A: No. Both parts use identical surface mount packaging: TO-277A (SMPC) with TO-277, 3-PowerDFN case designation. No PCB layout or assembly process modifications are required.

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

A: The TPC43HM3/86A is classified as obsolete, indicating discontinued manufacturing and limited availability. The TPC43AHM3_A/H maintains active product status, ensuring reliable supply chain access and ongoing manufacturer support.

Q: Are both parts RoHS compliant?

A: Yes. Both TPC43HM3/86A and TPC43AHM3_A/H are ROHS3 compliant with MSL rating of 1 (Unlimited), meeting environmental and regulatory requirements for automotive applications.

Q: Can these parts be used interchangeably in existing designs?

A: Yes, provided the circuit design accommodates the electrical parameter variations. The substitute's lower clamping voltage and higher current capability generally provide improved performance margins in transient protection circuits.