P4SMA9.1AHM3/I Equivalent & Substitute Parts

Part Overview

The P4SMA9.1AHM3/I is a unidirectional Transient Voltage Suppressor (TVS) diode from 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/I is currently discontinued at DiGi Electronics. Identifying equivalent substitute parts ensures design continuity and maintains supply chain reliability for applications requiring this specific voltage and current rating.

Substiute Parts

P4SMA9.1AHM3/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1051P4SMA9.1AHM3/I Datasheet

Current PartRFQ

P4SMA9.1AHM3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1133P4SMA9.1AHM3_A/I Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

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

• Voltage - Reverse Standoff: 7.78V (Typ)
• Voltage - Clamping (Max) @ Ipp: 13.4V
• Current - Peak Pulse: 29.9A
• Package / Case: DO-214AC (SMA)
• Unidirectional Channels: 1
• Type: Zener
• Series: P4SMA, TransZorb®
• Automotive Grade with AEC-Q101 qualification
• Operating Temperature Range: -65°C ~ 150°C (TJ)

The substitute part P4SMA9.1AHM3_A/I maintains identical electrical specifications and mechanical compatibility, with the primary distinction being packaging format (Tape & Reel) and active product status.

Parameter Comparison

Engineering Selection Recommendations

The P4SMA9.1AHM3_A/I is a direct functional equivalent to the P4SMA9.1AHM3/I. Both components share identical electrical characteristics, mechanical compatibility, and automotive-grade certifications (AEC-Q101). The substitute part maintains ROHS3 compliance and the same operating temperature specifications.

The primary distinction is product status: the original part is discontinued, while the substitute remains in active production. The packaging format difference (Tape & Reel for the substitute) does not affect electrical performance or PCB-level compatibility, though it may influence procurement quantities and handling procedures.

For applications requiring the P4SMA9.1AHM3/I, the P4SMA9.1AHM3_A/I provides full design continuity with the advantage of ongoing availability.

Frequently Asked Questions (FAQ)

Q: Are the P4SMA9.1AHM3/I and P4SMA9.1AHM3_A/I electrically identical?

A: Yes. Both components share identical voltage ratings (7.78V reverse standoff, 13.4V clamping), current specifications (29.9A peak pulse), power dissipation (400W), and operating temperature range (-65°C ~ 150°C). They are functionally equivalent for all circuit applications.

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

A: The primary differences are product status and packaging format. The P4SMA9.1AHM3/I is discontinued, while the P4SMA9.1AHM3_A/I is active. The substitute is supplied in Tape & Reel (TR) format, whereas the original uses standard packaging. Both are surface mount DO-214AC (SMA) packages suitable for identical PCB layouts.

Q: Can I use the P4SMA9.1AHM3_A/I as a direct replacement on my PCB?

A: Yes. The DO-214AC (SMA) package dimensions and pin configuration are identical. The component can be placed using the same footprint and assembly process. The Tape & Reel packaging affects only the supply format, not the component itself.

Q: Are both parts automotive-grade qualified?

A: Yes. Both the P4SMA9.1AHM3/I and P4SMA9.1AHM3_A/I carry automotive-grade classification with AEC-Q101 qualification, meeting automotive reliability and quality standards.

Q: Do both parts meet RoHS compliance requirements?

A: Yes. Both components are ROHS3 compliant and have REACH Unaffected status, meeting environmental and regulatory requirements for electronic components.