P4SMA9.1AHM3/H Equivalent & Substitute Parts

Part Overview

The P4SMA9.1AHM3/H is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, designed for telecom applications requiring transient overvoltage protection. This component features a 7.78V reverse standoff voltage with a 13.4V maximum clamping voltage and 29.9A peak pulse current capability in a surface mount DO-214AC (SMA) package.

The P4SMA9.1AHM3/H is currently discontinued at DiGi Electronics. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for production and repair applications.

Substiute Parts

P4SMA9.1AHM3/H

Vishay General Semiconductor - Diodes DivisionIn Stock: 1098P4SMA9.1AHM3/H Datasheet

Current PartRFQ

P4SMA9.1AHM3_A/H

Vishay General Semiconductor - Diodes DivisionIn Stock: 1243P4SMA9.1AHM3_A/H Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P4SMA9.1AHM3/H is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff (Typ): 7.78V
• Voltage - Breakdown (Min): 8.65V
• Voltage - Clamping (Max) @ Ipp: 13.4V
• Current - Peak Pulse (10/1000µs): 29.9A
• Power - Peak Pulse: 400W
• Package / Case: DO-214AC (SMA)
• Mounting Type: Surface Mount
• Operating Temperature Range: -65°C ~ 150°C (TJ)
• Grade: Automotive
• Qualification: AEC-Q101

The substitute part P4SMA9.1AHM3_A/H maintains identical electrical and mechanical specifications while differing only in packaging format (Tape & Reel) and product status (Active vs. Discontinued).

Parameter Comparison

Engineering Selection Recommendations

The P4SMA9.1AHM3_A/H is a direct functional equivalent to the P4SMA9.1AHM3/H. Both components are manufactured by Vishay General Semiconductor - Diodes Division and share identical electrical specifications, thermal characteristics, and automotive-grade qualifications (AEC-Q101).

The primary distinction is product availability and packaging format. The P4SMA9.1AHM3_A/H maintains Active product status with current inventory availability, while the original P4SMA9.1AHM3/H is discontinued. The substitute part is supplied in Tape & Reel (TR) packaging, which is standard for high-volume production environments.

Both parts comply with ROHS3 and maintain equivalent REACH and ECCN classifications. Selection between these parts should be based on procurement requirements and packaging format compatibility with assembly processes.

Frequently Asked Questions (FAQ)

Q: Can P4SMA9.1AHM3_A/H be used as a direct replacement for P4SMA9.1AHM3/H?

A: Yes. Both parts are electrically and mechanically identical, with matching voltage ratings (7.78V standoff, 13.4V clamping), current specifications (29.9A peak pulse), and thermal operating range (-65°C to 150°C). Both are AEC-Q101 qualified automotive-grade components in DO-214AC (SMA) surface mount packages.

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

A: The P4SMA9.1AHM3_A/H differs only in packaging format (Tape & Reel) and product status (Active vs. Discontinued). Electrical and mechanical specifications are identical.

Q: Are there any compatibility concerns with the Tape & Reel packaging?

A: No. Tape & Reel packaging is standard for surface mount components and is compatible with automated assembly equipment. The component itself remains unchanged.

Q: Do both parts meet automotive qualification requirements?

A: Yes. Both the P4SMA9.1AHM3/H and P4SMA9.1AHM3_A/H carry Automotive grade classification and AEC-Q101 qualification.

Q: What is the base product number for these parts?

A: The base product number is P4SMA9.1, which identifies the core TVS diode design within the P4SMA TransZorb® series.