TPC9.1HM3/86A Equivalent & Substitute Parts

Part Overview

The TPC9.1HM3/86A is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This component is designed for automotive-grade transient voltage protection applications, featuring a 13.8V clamping voltage and 109A peak pulse current capability in a surface mount TO-277A package. The part is currently classified as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

TPC9.1HM3/86A

Vishay General Semiconductor - Diodes DivisionIn Stock: 812TPC9.1HM3/86A Datasheet

Current PartRFQ

TPC9.1AHM3_A/H

Vishay General Semiconductor - Diodes DivisionIn Stock: 874TPC9.1AHM3_A/H Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TPC9.1HM3/86A is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Unidirectional Zener TVS diode topology
• Reverse standoff voltage within acceptable tolerance of 7.37V
• Clamping voltage at rated peak pulse current compatible with 13.8V specification
• Peak pulse current capability meeting or exceeding 109A (10/1000µs pulse)
• Peak pulse power dissipation of 1500W minimum

Mechanical & Package Requirements:

• Surface mount TO-277A (SMPC) package configuration
• 3-PowerDFN case designation
• Automotive-grade qualification (AEC-Q101)
• Operating temperature range of -65°C to 185°C (TJ)

Compliance Requirements:

• RoHS3 compliance
• Moisture Sensitivity Level 1 (Unlimited)
• REACH unaffected status

The substitute part TPC9.1AHM3_A/H meets all substitution criteria while offering active product status and improved availability.

Parameter Comparison

Engineering Selection Recommendations

The TPC9.1AHM3_A/H is a direct substitute for the obsolete TPC9.1HM3/86A based on the following engineering criteria:

Product Status Advantage: The substitute part maintains active product status with Vishay, ensuring long-term availability and continued manufacturing support compared to the obsolete main part.

Electrical Performance: The substitute demonstrates equivalent or superior electrical characteristics. The clamping voltage is 0.4V lower (13.4V vs 13.8V), and peak pulse current is marginally higher (112A vs 109A), both favorable for transient protection applications. The reverse standoff voltage differential of 0.41V remains within acceptable tolerance for automotive TVS applications.

Compliance & Certification: Both parts maintain identical automotive-grade qualification (AEC-Q101), RoHS3 compliance, and REACH unaffected status, ensuring regulatory continuity in automotive supply chains.

Package & Thermal Compatibility: Identical TO-277A surface mount package and 3-PowerDFN case designation ensure mechanical and thermal compatibility without PCB redesign. Operating temperature range remains -65°C to 185°C (TJ) for both parts.

Packaging Format: The substitute is available in Tape & Reel (TR) format, supporting automated assembly processes typical in production environments.

Frequently Asked Questions (FAQ)

Q: Can TPC9.1AHM3_A/H be used as a direct replacement for TPC9.1HM3/86A without circuit modification?

A: Yes. Both parts share identical package geometry (TO-277A), thermal characteristics (-65°C to 185°C operating range), and electrical topology (unidirectional Zener TVS). The electrical parameter variations fall within acceptable substitution tolerances for transient voltage suppression circuits.

Q: What is the significance of the clamping voltage difference (13.8V vs 13.4V)?

A: The substitute part exhibits a 0.4V lower clamping voltage, which provides marginally improved transient suppression performance. This difference is within typical circuit design margins for automotive TVS applications and does not require circuit redesign.

Q: Why is product status important when selecting a substitute?

A: The main part (TPC9.1HM3/86A) is classified as obsolete, indicating discontinued manufacturing and limited future availability. The substitute (TPC9.1AHM3_A/H) maintains active status, ensuring reliable long-term supply for production and field service applications.

Q: Are there any package or mounting differences between these parts?

A: No. Both parts utilize identical surface mount TO-277A (SMPC) packaging with 3-PowerDFN case designation. PCB footprints, solder reflow profiles, and automated assembly processes remain unchanged.

Q: Do both parts meet automotive qualification requirements?

A: Yes. Both TPC9.1HM3/86A and TPC9.1AHM3_A/H carry AEC-Q101 automotive qualification and maintain RoHS3 compliance with REACH unaffected status, meeting automotive supply chain requirements.

Q: What is the peak pulse current difference, and does it affect circuit performance?

A: The substitute provides 112A peak pulse current versus 109A for the main part, representing a 2.8% increase. This enhancement provides additional transient suppression margin without requiring circuit modifications.