TPSMP12HM3/85A Equivalent & Substitute Parts

Part Overview

The TPSMP12HM3/85A is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This component is designed for transient overvoltage protection in surface mount applications, featuring a 9.72V reverse standoff voltage and 17.3V maximum clamping voltage. 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

TPSMP12HM3/85A

Vishay General Semiconductor - Diodes DivisionIn Stock: 1021TPSMP12HM3/85A Datasheet

Current PartRFQ

TPSMP12AHM3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 996TPSMP12AHM3_A/I Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TPSMP12HM3/85A is determined by strict alignment of the following electrical and mechanical parameters:

Critical Substitution Criteria:

• Unidirectional channel configuration (1 channel required)
• Reverse standoff voltage range (9.72V nominal, with tolerance for breakdown minimum ≥10.8V)
• Clamping voltage performance (maximum 17.3V @ Ipp)
• Peak pulse current capability (minimum 17.3A at 10/1000µs pulse)
• Peak pulse power dissipation (minimum 300W)
• Operating temperature range (-65°C to 185°C)
• Automotive grade qualification (AEC-Q101)
• Surface mount packaging in DO-220AA case
• RoHS3 compliance and MSL Level 1

The substitute part TPSMP12AHM3_A/I meets all substitution criteria while offering improved electrical performance characteristics and active product status.

Parameter Comparison

Engineering Selection Recommendations

The TPSMP12AHM3_A/I is the qualified substitute for the obsolete TPSMP12HM3/85A. Both components share identical automotive grade classification and AEC-Q101 qualification, ensuring compliance with automotive reliability standards. The substitute maintains the same operating temperature range, RoHS3 compliance status, and MSL Level 1 rating.

The TPSMP12AHM3_A/I demonstrates enhanced electrical performance with increased peak pulse current (18A versus 17.3A) and peak pulse power dissipation (400W versus 300W), while maintaining clamping voltage within acceptable parameters. The substitute's active product status ensures long-term availability and supply chain continuity compared to the obsolete main part.

Frequently Asked Questions (FAQ)

Q: Can TPSMP12AHM3_A/I directly replace TPSMP12HM3/85A in existing designs?

A: Yes. Both components are unidirectional TVS diodes in DO-220AA surface mount packages with identical channel configuration, operating temperature range, and automotive qualification. Electrical parameters remain within compatible ranges for transient overvoltage protection applications.

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

A: The substitute exhibits a higher reverse standoff voltage (10.2V versus 9.72V) and breakdown minimum (11.4V versus 10.8V). Clamping voltage is slightly lower (16.7V versus 17.3V). Peak pulse current and power dissipation are improved in the substitute (18A and 400W versus 17.3A and 300W).

Q: Are both parts qualified for automotive applications?

A: Yes. Both TPSMP12HM3/85A and TPSMP12AHM3_A/I carry automotive grade classification and AEC-Q101 qualification, meeting automotive reliability and quality standards.

Q: What is the packaging difference between these parts?

A: The main part is supplied in standard packaging, while the substitute is supplied in Tape & Reel (TR) format. Both use identical DO-220AA (SMP) surface mount packages suitable for automated assembly processes.

Q: Why is the main part listed as obsolete?

A: TPSMP12HM3/85A is classified as obsolete by the manufacturer. The TPSMP12AHM3_A/I represents the active equivalent, ensuring continued availability and support for new designs and field replacements.