TPSMA15HE3_A/I Equivalent & Substitute Parts

Part Overview

The TPSMA15HE3_A/I is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, designed for surface mount applications in the DO-214AC (SMA) package. This component provides transient overvoltage protection with a 12.1V reverse standoff voltage and 22V maximum clamping voltage at peak pulse current. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for ongoing production and field replacement requirements.

Substiute Parts

TPSMA15HE3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1128TPSMA15HE3_A/I Datasheet

Current PartRFQ

TPSMA15AHE3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1183TPSMA15AHE3_B/I Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TPSMA15HE3_A/I is determined by strict electrical and mechanical compatibility criteria:

Critical Substitution Parameters:

• Unidirectional channel configuration (1 channel required)
• Reverse standoff voltage range (12.1V nominal, with tolerance for 12.8V variant acceptable within circuit design margins)
• Breakdown voltage minimum (13.5V or higher)
• Clamping voltage maximum at peak pulse current (22V or lower to maintain protection threshold)
• Peak pulse current capability (18.2A or higher)
• Peak pulse power dissipation (400W or higher)
• Operating temperature range (-65°C to 185°C minimum)
• Automotive grade qualification (AEC-Q101 required)
• Surface mount package (DO-214AC/SMA mandatory for PCB compatibility)
• RoHS3 compliance and MSL rating (1 - Unlimited)

The substitute part TPSMA15AHE3_B/I meets all substitution criteria while offering active product status, ensuring long-term availability and supply chain continuity.

Parameter Comparison

Engineering Selection Recommendations

The TPSMA15AHE3_B/I is the direct substitute for the obsolete TPSMA15HE3_A/I. Selection is based on the following engineering criteria:

Product Status: The substitute part maintains active product status with Vishay General Semiconductor - Diodes Division, ensuring continued availability and manufacturing support. The main part's obsolete classification necessitates transition to the active equivalent.

Compliance & Certification: Both parts carry identical automotive-grade qualification (AEC-Q101) and ROHS3 compliance, meeting regulatory and environmental requirements for automotive and industrial applications.

Electrical Compatibility: The substitute exhibits improved electrical characteristics within acceptable tolerance ranges. The slightly higher reverse standoff voltage (12.8V vs. 12.1V) and lower clamping voltage (21.2V vs. 22V) provide enhanced transient protection margins. Peak pulse current capability is increased (18.9A vs. 18.2A), offering superior surge handling capacity.

Mechanical & Thermal Compatibility: Identical package configuration (DO-214AC/SMA), mounting type (surface mount), and operating temperature range (-65°C to 185°C) ensure direct PCB compatibility without layout or thermal management modifications.

Supply Chain Continuity: With 1,077 pieces in stock versus 1,086 for the obsolete part, the substitute ensures uninterrupted supply for production and field replacement applications.

Frequently Asked Questions (FAQ)

Q: Can TPSMA15AHE3_B/I be used as a direct replacement for TPSMA15HE3_A/I without circuit modifications?

A: Yes. Both parts share identical package configuration (DO-214AC/SMA), mounting type (surface mount), operating temperature range, and automotive qualification (AEC-Q101). The substitute's improved electrical characteristics (higher peak pulse current, lower clamping voltage) are compatible with circuit designs specified for the main part.

Q: What is the significance of the voltage parameter differences between the two parts?

A: The substitute's reverse standoff voltage is 12.8V compared to 12.1V in the main part. This 0.7V increase remains within acceptable tolerance for TVS diode substitution in automotive applications. The clamping voltage reduction from 22V to 21.2V improves transient suppression performance. Both changes are compatible with circuit protection requirements.

Q: Are there any packaging or moisture sensitivity differences?

A: No. Both parts use identical DO-214AC (SMA) surface mount packaging with MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.

Q: Why is the main part classified as obsolete?

A: Product obsolescence is determined by the manufacturer based on production discontinuation. The TPSMA15AHE3_B/I remains in active production, providing equivalent functionality with improved electrical performance and assured long-term availability.

Q: Are both parts qualified for automotive applications?

A: Yes. Both parts carry automotive-grade classification with AEC-Q101 qualification, meeting automotive industry reliability and quality standards.

Q: What is the difference between the packaging designations in the part numbers?

A: The main part (TPSMA15HE3_A/I) and substitute (TPSMA15AHE3_B/I) differ in their revision designations (A/I vs. AHE3_B/I). Both use identical DO-214AC (SMA) physical packages. The substitute includes Tape & Reel (TR) packaging option for automated assembly, while the main part packaging is unspecified.