TPSMA27A-3HE3_A/I Equivalent & Substitute Parts

Part Overview

The TPSMA27A-3HE3_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 23.1V reverse standoff voltage and 37.5V maximum clamping voltage at peak pulse current of 10.7A. The part is currently classified as obsolete, making identification of active equivalent alternatives essential for ongoing design support and procurement continuity.

Substiute Parts

TPSMA27A-3HE3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1153TPSMA27A-3HE3_A/I Datasheet

Current PartRFQ

TPSMA27A-3HE3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 811TPSMA27A-3HE3_B/I Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TPSMA27A-3HE3_A/I is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff (Typ): 23.1V
• Voltage - Breakdown (Min): 25.7V
• Voltage - Clamping (Max) @ Ipp: 37.5V
• Current - Peak Pulse (10/1000µs): 10.7A
• Power - Peak Pulse: 400W
• Package / Case: DO-214AC, SMA
• Operating Temperature Range: -65°C to 185°C (TJ)
• Grade: Automotive
• Qualification: AEC-Q101

Only parts matching all these parameters across electrical performance and mechanical specifications qualify as direct substitutes. The TPSMA27A-3HE3_B/I meets these criteria with identical electrical characteristics and packaging, differing only in product status (Active vs. Obsolete).

Parameter Comparison

Engineering Selection Recommendations

The TPSMA27A-3HE3_B/I is a direct functional equivalent to the TPSMA27A-3HE3_A/I. Both parts are manufactured by Vishay within the PAR® series and share identical electrical specifications, thermal operating range, and automotive-grade qualification (AEC-Q101). The primary distinction is product lifecycle status: the original part is obsolete while the substitute remains in active production.

For new designs or ongoing procurement, the TPSMA27A-3HE3_B/I is the appropriate selection. Both parts maintain ROHS3 compliance and MSL 1 rating, ensuring compatibility with standard surface mount assembly processes. The identical DO-214AC (SMA) package footprint permits direct board-level substitution without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can TPSMA27A-3HE3_B/I be used as a direct replacement for TPSMA27A-3HE3_A/I?

A: Yes. Both parts are electrically and mechanically identical across all specified parameters. The substitute part is currently in active production status, making it the preferred choice for new procurement and design continuity.

Q: Are there any differences in electrical performance between these parts?

A: No. Both parts deliver identical voltage suppression characteristics (23.1V standoff, 37.5V clamping), peak pulse current (10.7A), and power dissipation (400W). Operating temperature range and thermal specifications are equivalent.

Q: Will the substitute part fit the existing PCB layout?

A: Yes. Both parts use the DO-214AC (SMA) surface mount package. No footprint or layout modifications are required for board-level substitution.

Q: Are both parts qualified for automotive applications?

A: Yes. Both the original and substitute parts carry automotive-grade designation with AEC-Q101 qualification, meeting automotive reliability and quality standards.

Q: What is the significance of the product status difference?

A: The original part (TPSMA27A-3HE3_A/I) is classified as obsolete, indicating discontinued production. The substitute (TPSMA27A-3HE3_B/I) maintains active status with ongoing manufacturing support, ensuring long-term availability for procurement and supply chain continuity.