TPSMC16AHE3_A/I Equivalent & Substitute Parts

Part Overview

The TPSMC16AHE3_A/I is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, designed for surface mount applications in the DO-214AB (SMCJ) package. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts that maintain electrical and mechanical compatibility for new designs and production continuity.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	13.6V
Voltage - Breakdown (Min)	15.2V
Voltage - Clamping (Max) @ Ipp	22.5V
Current - Peak Pulse (10/1000µs)	66.7A
Power - Peak Pulse	1500W (1.5kW)
Operating Temperature Range	-65°C ~ 185°C (TJ)
Package / Case	DO-214AB, SMC
Mounting Type	Surface Mount
Grade	Automotive
Qualification	AEC-Q101
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the TPSMC16AHE3_A/I is determined by the following critical parameters:

Electrical Parameters (Must Match):

Voltage - Reverse Standoff (Typ): 13.6V
Voltage - Breakdown (Min): 15.2V
Voltage - Clamping (Max) @ Ipp: 22.5V
Current - Peak Pulse (10/1000µs): 66.7A ±5%
Power - Peak Pulse: 1500W (1.5kW)

Mechanical Parameters (Must Match):

Package / Case: DO-214AB, SMC
Mounting Type: Surface Mount
Unidirectional Channels: 1

Compliance Parameters (Recommended for Automotive Applications):

Grade: Automotive
Qualification: AEC-Q101
RoHS Status: ROHS3 Compliant

Substitute parts are grouped into two categories: direct equivalents (matching all electrical and mechanical parameters with active product status) and functional alternatives (meeting electrical requirements with minor parameter variations acceptable for specific applications).

Parameter Comparison

Part Number	Manufacturer	Product Status	Voltage - Reverse Standoff (Typ)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Operating Temperature	Package	Grade	AEC-Q101
TPSMC16AHE3_A/I	Vishay	Obsolete	13.6V	22.5V	66.7A	1500W	-65°C ~ 185°C	DO-214AB (SMCJ)	Automotive	Yes
1.5SMC16A-E3/9AT	Vishay	Active	13.6V	22.5V	66.7A	1500W	-65°C ~ 150°C	DO-214AB (SMCJ)	General Purpose	No
TPSMC16AHE3_B/I	Vishay	Active	13.6V	22.5V	66.7A	1500W	-65°C ~ 185°C	DO-214AB (SMC)	Automotive	Yes
SZ1.5SMC16AT3G	onsemi	Active	13.6V	22.5V	67A	1500W	-65°C ~ 150°C	DO-214AB (SMC)	Automotive	Yes
TPSMC16A	Littelfuse Inc.	Active	13.6V	22.5V	67.6A	1500W	-55°C ~ 150°C	DO-214AB (SMCJ)	Automotive	Yes
SM15T18AY	STMicroelectronics	Active	15.3V	32.5V	308A (8/20µs)	1500W	-40°C ~ 150°C	DO-214AB (SMC)	Automotive	Yes
SMCJ12A	MDD	Active	12V	19.9V	75.4A	1500W	-50°C ~ 150°C	DO-214AB (SMC)	General Purpose	No

Engineering Selection Recommendations

Primary Recommendation: TPSMC16AHE3_B/I

This part is the direct successor to the TPSMC16AHE3_A/I. It maintains identical electrical specifications (13.6V standoff, 22.5V clamping, 66.7A peak pulse current, 1500W peak power), automotive grade qualification, AEC-Q101 certification, and extended operating temperature range (-65°C ~ 185°C). Product status is active with established supply chain availability. This is the preferred replacement for applications requiring automotive-grade compliance and high-temperature operation.

Secondary Recommendation: SZ1.5SMC16AT3G (onsemi)

This part provides electrical equivalence with 13.6V standoff, 22.5V clamping, and 67A peak pulse current. It carries automotive grade and AEC-Q101 qualification. Operating temperature range is -65°C ~ 150°C, which is suitable for most applications but does not extend to the upper 185°C limit of the original part. Use this option when onsemi supply chain preference or cost considerations apply and maximum operating temperature does not exceed 150°C.

Tertiary Recommendation: TPSMC16A (Littelfuse Inc.)

This part delivers electrical compatibility with 13.6V standoff, 22.5V clamping, and 67.6A peak pulse current. It holds automotive grade and AEC-Q101 certification. Operating temperature range is -55°C ~ 150°C. This option is suitable for applications where the lower temperature limit of -55°C is acceptable and maximum operating temperature does not exceed 150°C.

Alternative for Non-Automotive Applications: 1.5SMC16A-E3/9AT (Vishay)

This part matches all electrical parameters (13.6V standoff, 22.5V clamping, 66.7A peak pulse current) and package specifications. However, it is classified as general purpose rather than automotive grade and does not carry AEC-Q101 certification. Operating temperature range is -65°C ~ 150°C. Use only in non-automotive applications or where automotive qualification is not required.

Not Recommended: SM15T18AY and SMCJ12A

These parts do not meet the electrical parameter requirements of the TPSMC16AHE3_A/I. SM15T18AY has significantly different voltage ratings (15.3V standoff, 32.5V clamping) and peak pulse current (308A), making it unsuitable for direct substitution. SMCJ12A has lower voltage ratings (12V standoff, 19.9V clamping) and different peak pulse current (75.4A), disqualifying it from equivalent status.

Frequently Asked Questions (FAQ)

Q: Can TPSMC16AHE3_B/I be used as a direct replacement for TPSMC16AHE3_A/I?

A: Yes. TPSMC16AHE3_B/I is the active equivalent with identical electrical specifications, automotive grade, AEC-Q101 certification, and extended operating temperature range (-65°C ~ 185°C). The only difference is the supplier device package designation (SMC vs. SMCJ), which refers to the same DO-214AB physical package.

Q: What is the difference between automotive-grade and general-purpose TVS diodes?

A: Automotive-grade components undergo additional qualification testing per AEC-Q101 standards, including thermal cycling, moisture resistance, and reliability assessments. These components are certified for use in automotive environments. General-purpose components do not carry this certification and should not be used in automotive applications requiring compliance.

Q: Why does SM15T18AY appear in the substitute list if it is not recommended?

A: SM15T18AY was listed in the original part's substitute cross-reference data. However, its electrical parameters (15.3V standoff, 32.5V clamping, 308A peak pulse current) differ significantly from the TPSMC16AHE3_A/I specifications. It is not suitable for direct substitution and is included only for reference completeness.

Q: Can I use a substitute part with a lower operating temperature maximum if my application does not require 185°C operation?

A: Yes, provided your actual operating temperature does not exceed the substitute part's maximum rating. For example, TPSMC16A (maximum -55°C ~ 150°C) is acceptable if your application operates below 150°C. Always verify that the substitute part's temperature range encompasses your specific application requirements.

Q: Are all recommended substitutes available in the same package?

A: Yes. All recommended substitutes (TPSMC16AHE3_B/I, SZ1.5SMC16AT3G, and TPSMC16A) use the DO-214AB (SMC) surface mount package, ensuring mechanical compatibility with existing PCB layouts and assembly processes.

Q: What does RoHS3 compliance mean?

A: ROHS3 Compliant indicates the part meets Restriction of Hazardous Substances Directive 3 requirements, restricting the use of lead, cadmium, mercury, and other hazardous materials. All recommended substitutes carry ROHS3 compliance, ensuring environmental and regulatory conformance.

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