TPC33HM3/86A Equivalent & Substitute Parts

Part Overview

The TPC33HM3/86A 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 26.8V reverse standoff voltage and 47.7V maximum clamping voltage. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for continued system support and new designs.

Substiute Parts

TPC33HM3/86A

Vishay General Semiconductor - Diodes DivisionIn Stock: 858TPC33HM3/86A Datasheet

Current PartRFQ

TPC33AHM3_A/H

Vishay General Semiconductor - Diodes DivisionIn Stock: 3320TPC33AHM3_A/H Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TPC33HM3/86A is determined by strict alignment of the following electrical and mechanical parameters:

• Voltage rating class (reverse standoff and clamping voltage range)
• Peak pulse current capability
• Peak pulse power dissipation
• Package form factor (TO-277, 3-PowerDFN surface mount)
• Automotive grade qualification (AEC-Q101)
• Operating temperature range (-65°C to 185°C)
• Unidirectional channel configuration

The substitute part TPC33AHM3_A/H maintains compatibility within these parameters while offering improved availability as an active product.

Parameter Comparison

Engineering Selection Recommendations

The TPC33AHM3_A/H is the qualified substitute for the obsolete TPC33HM3/86A. Both components share identical automotive grade classification and AEC-Q101 qualification, ensuring compliance with automotive reliability standards. The substitute maintains the same package form factor (TO-277, 3-PowerDFN), operating temperature range, and power dissipation capability.

Electrical parameter variations between the main part and substitute are within acceptable tolerance bands for TVS diode applications. The substitute exhibits a slightly higher reverse standoff voltage (28.2V vs. 26.8V) and lower maximum clamping voltage (45.7V vs. 47.7V), with marginally increased peak pulse current capability (32.8A vs. 31.4A). These variations remain within the functional envelope of transient voltage suppression circuits.

The substitute part is currently in active production with confirmed inventory availability, eliminating supply chain risk associated with the obsolete main part number.

Frequently Asked Questions (FAQ)

Q: Can TPC33AHM3_A/H be used as a direct replacement for TPC33HM3/86A?

A: Yes. Both parts share identical package geometry (TO-277, 3-PowerDFN), mounting type (surface mount), and electrical performance envelope. No circuit board modifications are required.

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

A: The substitute exhibits a 1.4V higher reverse standoff voltage and 2.0V lower maximum clamping voltage. Peak pulse current is 1.4A higher. These variations fall within normal TVS diode tolerance specifications and do not affect circuit protection performance.

Q: Are both parts automotive qualified?

A: Yes. Both the TPC33HM3/86A and TPC33AHM3_A/H carry automotive grade classification with AEC-Q101 qualification, meeting automotive reliability and quality standards.

Q: What is the packaging difference between these parts?

A: The main part is supplied in standard packaging, while the substitute is available in Tape & Reel (TR) format. Both use identical component geometry and are compatible with automated assembly processes.

Q: Are there any compliance or regulatory differences?

A: No. Both parts are ROHS3 compliant, REACH unaffected, and carry identical moisture sensitivity level (MSL 1 - Unlimited) and regulatory classifications (ECCN: EAR99, HTSUS: 8541.10.0080).