TPSMP9.1HM3/85A Equivalent & Substitute Parts

Part Overview

The TPSMP9.1HM3/85A is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This component is designed for transient overvoltage protection in automotive-grade applications, featuring a 7.37V reverse standoff voltage and 13.8V maximum clamping voltage. The part is classified as obsolete, making identification of active equivalent components essential for ongoing production and maintenance requirements.

Substiute Parts

TPSMP9.1HM3/85A

Vishay General Semiconductor - Diodes DivisionIn Stock: 804TPSMP9.1HM3/85A Datasheet

Current PartRFQ

TPSMP9.1AHM3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1127TPSMP9.1AHM3_A/I Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TPSMP9.1HM3/85A is determined by strict adherence to the following electrical and mechanical parameters:

Critical Substitution Criteria:

• Unidirectional channel configuration (1 channel required)
• Identical package type: DO-220AA (SMP) surface mount
• Automotive grade classification with AEC-Q101 qualification
• Operating temperature range: -65°C ~ 185°C (TJ)
• Voltage parameters within acceptable tolerance: Reverse standoff voltage 7.37V ± tolerance, breakdown voltage minimum 8.19V, clamping voltage maximum 13.8V
• Current rating: Peak pulse current 21.7A minimum
• Power dissipation: Peak pulse power 300W minimum
• RoHS3 compliance and MSL 1 rating

The TPSMP9.1AHM3_A/I meets all substitution criteria as an active equivalent component from the same manufacturer and product series.

Parameter Comparison

Engineering Selection Recommendations

The TPSMP9.1AHM3_A/I is the qualified substitute for the obsolete TPSMP9.1HM3/85A. Selection is based on the following engineering factors:

Product Status: The main part is classified as obsolete, while the substitute maintains active product status with current manufacturing availability (1038 pcs in stock versus 712 pcs for the obsolete part).

Compliance and Certification: Both components carry identical automotive-grade classification and AEC-Q101 qualification, ensuring compliance with automotive industry standards. Both maintain ROHS3 compliance and MSL 1 (unlimited) moisture sensitivity rating.

Electrical Performance: The substitute demonstrates equivalent or superior electrical characteristics. The clamping voltage is lower (13.4V vs 13.8V), peak pulse current is higher (22.4A vs 21.7A), and peak pulse power is increased (400W vs 300W). These parameters indicate enhanced transient protection capability within the same voltage class.

Mechanical Compatibility: Identical DO-220AA (SMP) surface mount package ensures direct PCB footprint compatibility without layout modifications.

Supply Chain Continuity: The substitute part is actively manufactured and stocked, providing long-term availability for production and field replacement requirements.

Frequently Asked Questions (FAQ)

Q: Can TPSMP9.1AHM3_A/I be used as a direct replacement for TPSMP9.1HM3/85A?

A: Yes. Both components share identical package type (DO-220AA SMP), mounting configuration (surface mount), automotive grade, AEC-Q101 qualification, and operating temperature range. The substitute meets or exceeds all critical electrical parameters required for transient voltage suppression in the same application circuit.

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

A: The substitute exhibits slightly higher reverse standoff voltage (7.78V vs 7.37V) and breakdown voltage (8.65V vs 8.19V), lower maximum clamping voltage (13.4V vs 13.8V), higher peak pulse current (22.4A vs 21.7A), and increased peak pulse power (400W vs 300W). The substitute is active product status while the main part is obsolete.

Q: Are there packaging differences?

A: The main part uses standard packaging, while the substitute is supplied in Tape & Reel (TR) format. Both use identical DO-220AA (SMP) component package, ensuring PCB compatibility. Tape & Reel packaging is standard for high-volume surface mount assembly.

Q: Do both parts meet automotive qualification requirements?

A: Yes. Both components are automotive-grade with AEC-Q101 qualification, ROHS3 compliance, and MSL 1 rating. They are suitable for automotive applications requiring transient overvoltage protection.

Q: Why is the main part listed as obsolete?

A: Product obsolescence typically results from manufacturer discontinuation decisions. The TPSMP9.1AHM3_A/I remains in active production as the current equivalent, ensuring continued availability for new designs and field replacements.