P4SMA43AHM3/H Equivalent & Substitute Parts

Part Overview

The P4SMA43AHM3/H 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 36.8V reverse standoff voltage with a 59.3V maximum clamping voltage and 6.7A peak pulse current capability in a surface mount DO-214AC (SMA) package. The part is discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing procurement and design continuity.

Substiute Parts

P4SMA43AHM3/H

Vishay General Semiconductor - Diodes DivisionIn Stock: 1198P4SMA43AHM3/H Datasheet

Current PartRFQ

P4SMA43AHM3_A/H

Vishay General Semiconductor - Diodes DivisionIn Stock: 796P4SMA43AHM3_A/H Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the P4SMA43AHM3/H is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff (Typ): 36.8V
• Voltage - Breakdown (Min): 40.9V
• Voltage - Clamping (Max) @ Ipp: 59.3V
• Current - Peak Pulse (10/1000µs): 6.7A
• Power - Peak Pulse: 400W
• Package / Case: DO-214AC, SMA
• Type: Zener, Unidirectional
• Operating Temperature Range: -65°C ~ 150°C (TJ)
• Grade: Automotive
• Qualification: AEC-Q101

The substitute part P4SMA43AHM3_A/H meets all these parameters identically, with the primary difference being packaging format (Tape & Reel versus bulk) and active product status.

Parameter Comparison

Engineering Selection Recommendations

The P4SMA43AHM3_A/H is a direct functional equivalent to the P4SMA43AHM3/H with identical electrical and mechanical specifications. The substitute part maintains active product status with Vishay, ensuring continued availability and supply chain reliability. Both parts carry AEC-Q101 automotive qualification and ROHS3 compliance, meeting regulatory requirements for automotive and telecom applications.

The primary distinction is packaging format: the substitute is supplied in Tape & Reel format, which is standard for automated assembly processes. This packaging difference does not affect component performance or compatibility in circuit applications. Selection between these parts should be based on procurement requirements and assembly process specifications.

Frequently Asked Questions (FAQ)

Q: Are the P4SMA43AHM3/H and P4SMA43AHM3_A/H electrically identical?

A: Yes. Both parts share identical electrical specifications including voltage ratings, current ratings, and thermal characteristics. They are functionally interchangeable in circuit design.

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

A: The primary difference is packaging format. The P4SMA43AHM3/H is supplied in bulk packaging, while the P4SMA43AHM3_A/H is supplied in Tape & Reel (TR) format. This affects handling and automated assembly compatibility but not electrical performance.

Q: Can I use the Tape & Reel version in place of the bulk version?

A: Yes, provided your assembly process supports Tape & Reel packaging. The components themselves are identical. Verify that your pick-and-place equipment and tape specifications are compatible with the supplier device package format.

Q: Why is the original part discontinued?

A: The P4SMA43AHM3/H is discontinued at DiGi Electronics. The P4SMA43AHM3_A/H remains in active production with Vishay, providing continued availability for this voltage and current rating in the P4SMA series.

Q: Are both parts AEC-Q101 qualified?

A: Yes. Both the P4SMA43AHM3/H and P4SMA43AHM3_A/H carry AEC-Q101 automotive qualification and are suitable for automotive and telecom applications requiring transient voltage suppression.

Q: What is the operating temperature range for these parts?

A: Both parts operate across -65°C to 150°C junction temperature (TJ), meeting automotive and industrial application requirements.