P4SMA300AHM3_A/I Equivalent & Substitute Parts

Part Overview

The P4SMA300AHM3_A/I is a unidirectional Transient Voltage Suppressor (TVS) diode from Vishay General Semiconductor - Diodes Division, designed for transient overvoltage protection in telecom applications. This component features a 256V reverse standoff voltage with 414V maximum clamping voltage and 730mA 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 P4SMA300AHM3_A/I is currently discontinued at DiGi Electronics. Identifying equivalent substitute parts ensures design continuity and maintains supply chain flexibility for new production runs and field replacements.

Substiute Parts

P4SMA300AHM3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 968P4SMA300AHM3_A/I Datasheet

Current PartRFQ

P4SMA300AHM3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 868P4SMA300AHM3_B/I Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for TVS diodes is determined by strict equivalence across electrical and mechanical parameters. The P4SMA300AHM3_A/I can be substituted with parts that maintain identical specifications in the following critical areas:

Electrical Parameters (Must Match):

• Voltage - Reverse Standoff (Typ): 256V
• Voltage - Breakdown (Min): 285V
• Voltage - Clamping (Max) @ Ipp: 414V
• Current - Peak Pulse (10/1000µs): 730mA
• Power - Peak Pulse: 400W
• Operating Temperature Range: -65°C ~ 150°C (TJ)

Mechanical Parameters (Must Match):

• Package / Case: DO-214AC, SMA
• Mounting Type: Surface Mount
• Unidirectional Channels: 1

Compliance & Certification (Must Match):

• Manufacturer: Vishay General Semiconductor - Diodes Division
• Grade: Automotive
• Qualification: AEC-Q101
• RoHS Status: ROHS3 Compliant

Packaging format (Tape & Reel vs. other formats) does not affect electrical or mechanical compatibility and is therefore not a substitution barrier.

Parameter Comparison

Engineering Selection Recommendations

The P4SMA300AHM3_B/I is a direct functional equivalent to the P4SMA300AHM3_A/I. Both parts are manufactured by Vishay General Semiconductor - Diodes Division and share identical electrical and mechanical specifications. The primary distinction is product status: the P4SMA300AHM3_A/I is discontinued, while the P4SMA300AHM3_B/I maintains active status.

Both parts carry AEC-Q101 automotive qualification and ROHS3 compliance, ensuring equivalent reliability and regulatory standing. The P4SMA300AHM3_B/I is available in Tape & Reel packaging format, which is standard for high-volume production and automated assembly processes.

For new designs or production runs requiring the P4SMA300 series TVS diode with 256V standoff voltage and 414V clamping characteristics, the P4SMA300AHM3_B/I is the appropriate selection. For existing inventory management or field replacement scenarios, this substitute maintains full electrical and mechanical compatibility.

Frequently Asked Questions (FAQ)

Q: Can P4SMA300AHM3_B/I be used as a direct replacement for P4SMA300AHM3_A/I in existing designs?

A: Yes. Both parts are identical in electrical performance, mechanical form factor, and automotive qualification. The P4SMA300AHM3_B/I is a direct substitute with no design modifications required.

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

A: The suffix designations (_A/I vs. _B/I) indicate different manufacturing batches or revisions from Vishay. The electrical and mechanical specifications are identical. The primary practical difference is that P4SMA300AHM3_A/I is discontinued, while P4SMA300AHM3_B/I is currently in active production.

Q: Does packaging format affect compatibility?

A: No. The P4SMA300AHM3_A/I and P4SMA300AHM3_B/I are functionally equivalent regardless of packaging format (Tape & Reel vs. other formats). Both use the same DO-214AC (SMA) surface mount package and are compatible with standard pick-and-place assembly equipment.

Q: Are both parts AEC-Q101 qualified?

A: Yes. Both the P4SMA300AHM3_A/I and P4SMA300AHM3_B/I carry AEC-Q101 automotive qualification and are ROHS3 compliant, ensuring equivalent reliability for automotive and industrial applications.

Q: What are the key electrical parameters that define this TVS diode's function?

A: The P4SMA300 series is defined by a 256V reverse standoff voltage, 285V minimum breakdown voltage, and 414V maximum clamping voltage at 730mA peak pulse current. These parameters determine its suitability for transient overvoltage protection in telecom and automotive circuits operating in this voltage range.