TPC39HM3/87A Equivalent & Substitute Parts

Part Overview

The TPC39HM3/87A 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 applications, featuring a 31.6V reverse standoff voltage and 56.4V maximum clamping voltage. The part is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity. The TPC39AHM3_A/I serves as a direct functional equivalent with comparable electrical performance and identical mechanical packaging.

Substiute Parts

TPC39HM3/87A

Vishay General Semiconductor - Diodes DivisionIn Stock: 758TPC39HM3/87A Datasheet

Current PartRFQ

TPC39AHM3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 847TPC39AHM3_A/I Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TPC39HM3/87A is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Reverse standoff voltage within acceptable tolerance range
• Breakdown voltage minimum threshold
• Clamping voltage performance at peak pulse current
• Peak pulse current rating (10/1000µs waveform)
• Peak pulse power dissipation capacity

Mechanical & Compliance Criteria:

• Identical package type (TO-277, 3-PowerDFN)
• Surface mount configuration
• Automotive grade qualification (AEC-Q101)
• Operating temperature range (-65°C to 185°C)
• RoHS3 compliance and REACH status

The TPC39AHM3_A/I meets all substitution requirements with comparable voltage and current ratings, identical packaging, and equivalent automotive qualification.

Parameter Comparison

Engineering Selection Recommendations

The TPC39AHM3_A/I is the qualified substitute for the obsolete TPC39HM3/87A. Selection is based on the following factors:

Product Status: The TPC39HM3/87A is classified as obsolete, necessitating transition to an active part. The TPC39AHM3_A/I maintains active product status with current manufacturing support.

Compliance & Certification: Both components carry identical automotive-grade qualification (AEC-Q101), RoHS3 compliance, and REACH unaffected status, ensuring regulatory continuity in automotive applications.

Electrical Performance: The substitute exhibits marginally higher reverse standoff voltage (33.3V vs. 31.6V) and improved peak pulse current capability (27.8A vs. 26.6A), while maintaining equivalent clamping voltage performance and power dissipation ratings.

Packaging & Mounting: Identical TO-277 3-PowerDFN surface mount package ensures direct PCB compatibility without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can TPC39AHM3_A/I be used as a direct replacement for TPC39HM3/87A?

A: Yes. Both components share identical package geometry (TO-277, 3-PowerDFN), mounting type (surface mount), and electrical performance envelope. No PCB redesign is required.

Q: What are the key electrical differences between these parts?

A: The substitute exhibits a 1.7V higher reverse standoff voltage (33.3V vs. 31.6V) and 1.2A higher peak pulse current rating (27.8A vs. 26.6A). Clamping voltage is marginally lower (53.9V vs. 56.4V). These variations remain within acceptable substitution tolerance for TVS diode applications.

Q: Are both parts qualified for automotive use?

A: Yes. Both components carry AEC-Q101 automotive qualification and are suitable for automotive transient protection circuits.

Q: What is the packaging difference between TPC39HM3/87A and TPC39AHM3_A/I?

A: The main part is supplied in standard packaging, while the substitute is available in Tape & Reel (TR) format. Both use identical TO-277 3-PowerDFN package geometry and are mechanically interchangeable.

Q: Are there any compliance or regulatory differences?

A: No. Both components are ROHS3 compliant, REACH unaffected, and carry identical moisture sensitivity level (MSL 1 - Unlimited) ratings.