P4SMA540AHM3_A/I Equivalent & Substitute Parts

Part Overview

The P4SMA540AHM3_A/I is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, designed for telecom applications requiring high-voltage transient protection. This component features a 459V reverse standoff voltage with 740V maximum clamping voltage and 410mA peak pulse current capability in a surface-mount DO-214AC (SMA) package. The part is AEC-Q101 qualified for automotive-grade reliability and ROHS3 compliant.

The P4SMA540AHM3_A/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 protection profile.

Substiute Parts

P4SMA540AHM3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 872P4SMA540AHM3_A/I Datasheet

Current PartRFQ

P4SMA540AHM3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1195P4SMA540AHM3_B/I Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P4SMA540AHM3_A/I is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff (Typ): 459V
• Voltage - Breakdown (Min): 513V
• Voltage - Clamping (Max) @ Ipp: 740V
• Current - Peak Pulse (10/1000µs): 410mA
• Power - Peak Pulse: 400W
• Unidirectional Channels: 1
• Package / Case: DO-214AC, SMA
• Operating Temperature Range: -65°C ~ 150°C (TJ)
• Grade: Automotive
• Qualification: AEC-Q101

The P4SMA540AHM3_B/I is a direct substitute within the same P4SMA540 base product family, maintaining identical electrical specifications and mechanical compatibility. The primary distinction is packaging format and product status.

Parameter Comparison

Engineering Selection Recommendations

The P4SMA540AHM3_B/I is the direct functional equivalent of the P4SMA540AHM3_A/I. Both components share identical electrical characteristics, thermal performance, and mechanical compatibility within the DO-214AC (SMA) package footprint.

Selection between these parts should be based on:

• Product availability: The P4SMA540AHM3_B/I maintains active product status with current inventory availability (1148 pcs), whereas the P4SMA540AHM3_A/I is discontinued.
• Packaging requirements: The P4SMA540AHM3_B/I is supplied in Tape & Reel (TR) format, suitable for automated assembly processes.
• Compliance requirements: Both parts maintain AEC-Q101 automotive qualification and ROHS3 compliance, ensuring regulatory alignment for automotive and telecom applications.

Frequently Asked Questions (FAQ)

Q: Can P4SMA540AHM3_B/I be used as a direct replacement for P4SMA540AHM3_A/I?

A: Yes. Both parts are electrically and mechanically identical, with matching voltage ratings (459V standoff, 740V clamping), current specifications (410mA peak pulse), and thermal operating range (-65°C to 150°C). The primary difference is packaging format and product status.

Q: What is the difference between the packaging formats?

A: The P4SMA540AHM3_A/I uses standard packaging, while the P4SMA540AHM3_B/I is supplied in Tape & Reel (TR) format. Tape & Reel packaging is optimized for high-volume automated assembly and reduces component handling during manufacturing.

Q: Are both parts suitable for automotive applications?

A: Yes. Both the P4SMA540AHM3_A/I and P4SMA540AHM3_B/I carry automotive-grade classification with AEC-Q101 qualification, meeting reliability and quality standards for automotive and telecom transient protection circuits.

Q: What are the key parameters that determine substitution compatibility?

A: Substitution compatibility is determined by matching: reverse standoff voltage (459V), breakdown voltage (513V minimum), clamping voltage (740V maximum), peak pulse current (410mA), package type (DO-214AC/SMA), and thermal operating range (-65°C to 150°C). All these parameters are identical between the two parts.

Q: Is the P4SMA540AHM3_B/I available in stock?

A: Yes. The P4SMA540AHM3_B/I has 1148 pcs of new original inventory currently available, providing reliable supply for production requirements.