TPSMA12HE3_A/I Equivalent & Substitute Parts

Part Overview

The TPSMA12HE3_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 9.72V reverse standoff voltage and 17.3V maximum clamping voltage at peak pulse current. The part is classified as Obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement.

Substiute Parts

TPSMA12HE3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 998TPSMA12HE3_A/I Datasheet

Current PartRFQ

TPSMA12AHE3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 804TPSMA12AHE3_B/I Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TPSMA12HE3_A/I is determined by the following critical electrical and mechanical parameters:

• Reverse standoff voltage tolerance (9.72V nominal for TPSMA12 series)
• Breakdown voltage minimum threshold (10.8V minimum)
• Clamping voltage performance at peak pulse current
• Peak pulse current capability (23.1A minimum)
• Peak pulse power dissipation (400W)
• Package compatibility (DO-214AC/SMA surface mount)
• Automotive grade qualification (AEC-Q101)
• Operating temperature range (-65°C to 185°C)

The TPSMA12AHE3_B/I meets these substitution criteria as a member of the same PAR® series with compatible electrical characteristics and identical package specifications.

Parameter Comparison

Engineering Selection Recommendations

The TPSMA12AHE3_B/I is the direct substitute for the obsolete TPSMA12HE3_A/I. Both components are manufactured by Vishay General Semiconductor - Diodes Division within the PAR® series and maintain identical automotive qualification (AEC-Q101) and RoHS3 compliance status.

The substitute part demonstrates superior product status as an Active component, ensuring long-term availability and supply chain continuity. Electrical parameters remain within compatible operating ranges: the slightly higher reverse standoff voltage (10.2V vs. 9.72V) and clamping voltage (16.7V vs. 17.3V) present no functional degradation for transient suppression applications. Peak pulse current capability is marginally improved (24A vs. 23.1A), and power dissipation remains constant at 400W.

Packaging, mounting type, and thermal operating range are identical, permitting direct board-level substitution without design modification.

Frequently Asked Questions (FAQ)

Q: Can TPSMA12AHE3_B/I be used as a direct replacement for TPSMA12HE3_A/I?

A: Yes. Both components share identical package specifications (DO-214AC/SMA), automotive grade qualification (AEC-Q101), and compatible electrical characteristics within the PAR® series. The substitute part is electrically and mechanically interchangeable.

Q: What is the difference in clamping voltage between these parts?

A: The TPSMA12HE3_A/I specifies 17.3V maximum clamping voltage, while the TPSMA12AHE3_B/I specifies 16.7V. This 0.6V difference remains within acceptable transient suppression performance for automotive applications and does not require circuit redesign.

Q: Are there packaging differences between the main part and substitute?

A: No. Both components use identical DO-214AC (SMA) surface mount packaging. The TPSMA12AHE3_B/I is supplied in Tape & Reel format, which is standard for production quantities and does not affect component functionality or board assembly compatibility.

Q: Why is the main part listed as Obsolete?

A: The TPSMA12HE3_A/I has reached end-of-life status. The TPSMA12AHE3_B/I, maintained as an Active product by Vishay, provides continued design support and procurement availability for the TPSMA12 voltage suppression function.

Q: Do both parts meet automotive compliance requirements?

A: Yes. Both the TPSMA12HE3_A/I and TPSMA12AHE3_B/I carry Automotive grade classification and AEC-Q101 qualification, meeting automotive industry reliability and qualification standards.