Equivalent & Substitute Parts Reference for TPC9.1HM3/87A

Part Overview

The Vishay TPC9.1HM3/87A is a unidirectional transient voltage suppressor (TVS) diode, classified within the Transient Voltage Suppressors (TVS) category. It provides 13.8V clamping, supports a peak pulse current of 109A, and is housed in a surface-mount TO-277A (SMPC) package. The product is automotive grade (AEC-Q101 qualified), RoHS3 compliant, and intended for high-reliability circuit protection. As this TVS diode is designated Obsolete, it is necessary to identify alternative models with closely matching electrical and mechanical parameters.

Key Parameters

Parameter	Value
Type	Zener
Unidirectional Channels	1
Voltage - Reverse Standoff (Typ)	7.37V
Voltage - Breakdown (Min)	8.19V
Voltage - Clamping (Max) @ Ipp	13.8V
Current - Peak Pulse (10/1000µs)	109A
Power - Peak Pulse	1500W (1.5kW)
Grade	Automotive
Qualification	AEC-Q101
Mounting Type	Surface Mount
Package / Case	TO-277, 3-PowerDFN
Supplier Device Package	TO-277A (SMPC)
RoHS Status	ROHS3 Compliant
Operating Temperature	-65°C ~ 185°C (TJ)
MSL	1 (Unlimited)
REACH Status	REACH Unaffected
ECCN	EAR99
HTSUS	8541.10.0080

Substitute Part Grouping Explanation

Substitutes for the TPC9.1HM3/87A are defined strictly by matching core electrical and mechanical parameters within the Transient Voltage Suppressors (TVS) category. Allowed substitution is based on the following parameters: unidirectionality, voltage ratings (reverse standoff, breakdown, clamping), peak pulse current and power, package and mounting type, automotive qualification (AEC-Q101), RoHS compliance, and MSL rating.

Parameter Comparison

Part Number	Status	Type	Unidirectional Channels	Voltage - Reverse Standoff (Typ)	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Grade	Qualification	Mounting Type	Package / Case	Supplier Device Package	RoHS Status	MSL	Operating Temperature
TPC9.1HM3/87A	Obsolete	Zener	1	7.37V	8.19V	13.8V	109A	1500W (1.5kW)	Automotive	AEC-Q101	Surface Mount	TO-277, 3-PowerDFN	TO-277A (SMPC)	ROHS3 Compliant	1 (Unlimited)	-65°C ~ 185°C (TJ)
TPC9.1AHM3_A/I	Active	Zener	1	7.78V	8.65V	13.4V	112A	1500W (1.5kW)	Automotive	AEC-Q101	Surface Mount	TO-277, 3-PowerDFN	TO-277A (SMPC)	ROHS3 Compliant	1 (Unlimited)	-65°C ~ 185°C (TJ)

Engineering Selection Recommendations

Based on the product status, RoHS compliance, and AEC-Q101 automotive qualification, TPC9.1AHM3_A/I is a suitable substitute for TPC9.1HM3/87A. Both parts share equivalent compliance and qualification status, and utilize the same package and mounting specifications.

Frequently Asked Questions (FAQ)

Q1: What are the primary criteria for substituting TPC9.1HM3/87A with another part?
A1: Substitution requires matching unidirectional operation, voltage and current ratings, peak pulse power, automotive qualification (AEC-Q101), RoHS compliance, mounting type, and package.

Q2: Is the TO-277A (SMPC) package on TPC9.1AHM3_A/I fully compatible with the obsolete TPC9.1HM3/87A?
A2: Both parts use TO-277A (SMPC) surface-mount package and are mechanically compatible.

Q3: Are there differences in automotive or environmental qualification between the original and substitute part?
A3: Both parts are automotive grade, AEC-Q101 qualified, RoHS3 compliant, and REACH unaffected.

Q4: Does the substitute part provide the same electrical performance parameters?
A4: TPC9.1AHM3_A/I matches key parameters, including power rating, package, and automotive qualification, with minor differences in voltage and current ratings provided in the comparison table.

Q5: What is the MSL rating, and is it identical between the two parts?
A5: Both parts have an MSL rating of 1 (Unlimited), indicating the same moisture sensitivity for assembly processes.

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