TPSMC6.8HE3_A/I Equivalent & Substitute Parts

Part Overview

The TPSMC6.8HE3_A/I 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 and industrial applications, featuring a 5.5V reverse standoff voltage and 10.8V maximum clamping voltage in a surface-mount DO-214AB (SMC) package. The part is currently classified as obsolete, making equivalent substitutes necessary for ongoing design support and procurement.

Substiute Parts

TPSMC6.8HE3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 917TPSMC6.8HE3_A/I Datasheet

Current PartRFQ

TPSMC6.8AHE3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 981TPSMC6.8AHE3_B/I Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TPSMC6.8HE3_A/I is determined by the following critical parameters:

• Package compatibility: DO-214AB (SMC) surface-mount package required for mechanical and thermal fit
• Voltage class alignment: Reverse standoff voltage within acceptable tolerance range (5.5V nominal)
• Peak pulse current capability: Minimum 139A at 10/1000µs pulse width
• Peak pulse power rating: Minimum 1500W dissipation capability
• Thermal operating range: -65°C to 185°C junction temperature
• Automotive qualification: AEC-Q101 certification mandatory
• RoHS compliance: ROHS3 Compliant status required

The TPSMC6.8AHE3_B/I qualifies as a direct substitute based on these parameters. While minor variations exist in reverse standoff voltage (5.8V vs 5.5V) and clamping voltage (10.5V vs 10.8V), these differences remain within the functional tolerance for TVS diode substitution in the same application class.

Parameter Comparison

Engineering Selection Recommendations

The TPSMC6.8AHE3_B/I is the qualified substitute for the obsolete TPSMC6.8HE3_A/I. Selection is supported by:

• Active product status: The substitute maintains current manufacturing and supply chain availability, eliminating obsolescence risk
• Identical package specification: Both components use DO-214AB (SMC) surface-mount packaging, ensuring direct PCB compatibility without layout modifications
• Matching automotive qualification: Both parts hold AEC-Q101 certification, maintaining compliance for automotive applications
• Equivalent thermal performance: Identical operating temperature range (-65°C to 185°C) and thermal characteristics
• Consistent RoHS compliance: Both parts meet ROHS3 requirements
• Functional voltage alignment: The 5.8V reverse standoff voltage of the substitute represents a 5.5% increase over the main part, remaining within acceptable TVS diode tolerance bands for the same protection class
• Enhanced peak pulse current: The substitute provides 143A peak pulse current versus 139A, offering improved transient handling capability

Frequently Asked Questions (FAQ)

Q: Can TPSMC6.8AHE3_B/I be used as a direct replacement without circuit modifications?

A: Yes. Both components share identical package specifications (DO-214AB/SMC), thermal operating ranges, and power ratings. No PCB layout or schematic changes are required for substitution.

Q: What is the significance of the voltage differences between the main part and substitute?

A: The TPSMC6.8AHE3_B/I has a 5.8V reverse standoff voltage compared to 5.5V for the main part. This 0.3V difference is within standard TVS diode tolerance specifications and does not affect functional compatibility in the same application circuit. The clamping voltage difference (10.5V vs 10.8V) similarly remains within acceptable operating margins.

Q: Are both parts suitable for automotive applications?

A: Yes. Both the TPSMC6.8HE3_A/I and TPSMC6.8AHE3_B/I carry automotive-grade classification with AEC-Q101 qualification, meeting automotive reliability and quality standards.

Q: Why is the main part listed as obsolete?

A: The TPSMC6.8HE3_A/I is no longer in active production. The TPSMC6.8AHE3_B/I represents the current active equivalent from the same manufacturer, ensuring continued availability and supply chain support.

Q: What is the packaging difference between the two parts?

A: The main part is supplied in standard packaging, while the substitute (TPSMC6.8AHE3_B/I) is available in Tape & Reel (TR) format. Both use the identical DO-214AB (SMC) component package. Tape & Reel packaging is standard for high-volume surface-mount assembly and does not affect component performance or compatibility.

Q: Are there any compliance or certification differences?

A: No. Both parts maintain identical RoHS3 compliance status, AEC-Q101 automotive qualification, and Moisture Sensitivity Level (MSL) ratings. Compliance requirements are fully met by the substitute.