TPC51AHM3/86A Equivalent & Substitute Parts

Part Overview

The TPC51AHM3/86A 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 43.6V reverse standoff voltage and 70.1V maximum clamping voltage with 21.4A peak pulse current capability. The part is classified as obsolete, making identification of active equivalent parts essential for ongoing design support and procurement.

Substiute Parts

TPC51AHM3/86A

Vishay General Semiconductor - Diodes DivisionIn Stock: 3028TPC51AHM3/86A Datasheet

Current PartRFQ

TPC51AHM3_A/H

Vishay General Semiconductor - Diodes DivisionIn Stock: 995TPC51AHM3_A/H Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TPC51AHM3/86A is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff: 43.6V (Typ)
• Voltage - Breakdown: 48.5V (Min)
• Voltage - Clamping: 70.1V (Max) @ Ipp
• Current - Peak Pulse: 21.4A (10/1000µs)
• Power - Peak Pulse: 1500W
• Operating Temperature Range: -65°C to 185°C (TJ)
• Package / Case: TO-277, 3-PowerDFN
• Mounting Type: Surface Mount
• Automotive Grade and AEC-Q101 Qualification

The substitute part TPC51AHM3_A/H maintains identical electrical and thermal specifications while differing only in product status (Active vs. Obsolete) and packaging format (Tape & Reel vs. standard packaging).

Parameter Comparison

Engineering Selection Recommendations

The TPC51AHM3_A/H is a direct functional equivalent to the TPC51AHM3/86A. Both parts are manufactured by Vishay and share identical electrical specifications, thermal ratings, and automotive qualifications (AEC-Q101). The primary distinction is product status: the original part is obsolete while the substitute is active.

For new designs or ongoing production requiring this TVS diode specification, the TPC51AHM3_A/H is the appropriate selection. The substitute maintains full compliance with automotive-grade requirements and RoHS3 regulations. The Tape & Reel packaging format of the substitute is standard for high-volume manufacturing and does not affect functional performance or board-level integration.

Frequently Asked Questions (FAQ)

Q: Can TPC51AHM3_A/H be used as a direct replacement for TPC51AHM3/86A?

A: Yes. Both parts are electrically and mechanically identical with matching voltage ratings (43.6V standoff, 70.1V clamping), current ratings (21.4A peak pulse), thermal specifications (-65°C to 185°C), and automotive qualifications (AEC-Q101). The substitute is the active production equivalent.

Q: What is the difference between the two part numbers?

A: The TPC51AHM3/86A is obsolete, while TPC51AHM3_A/H is active. The substitute uses Tape & Reel packaging format, which is standard for manufacturing. All electrical and mechanical specifications are identical.

Q: Are there any compatibility concerns with the TO-277A (SMPC) package?

A: No. Both parts use the same TO-277, 3-PowerDFN package configuration. PCB footprints, thermal management, and mounting procedures are identical.

Q: Does the packaging format affect performance?

A: No. Tape & Reel is a delivery and handling format only. It does not affect component performance, reliability, or electrical characteristics.

Q: Are both parts automotive-grade qualified?

A: Yes. Both the TPC51AHM3/86A and TPC51AHM3_A/H carry Automotive Grade classification and AEC-Q101 qualification, meeting automotive industry standards.

Q: What is the operating temperature range for these parts?

A: Both parts operate across -65°C to 185°C (junction temperature), suitable for automotive and industrial applications requiring wide temperature performance.