P4SMA250AHM3_A/I Equivalent & Substitute Parts

Part Overview

The P4SMA250AHM3_A/I is a unidirectional Transient Voltage Suppressor (TVS) diode from Vishay General Semiconductor - Diodes Division, designed for telecom applications requiring transient voltage protection. This component features a 214V reverse standoff voltage with a 344V maximum clamping voltage and 870mA 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 P4SMA250AHM3_A/I is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives to maintain design continuity and supply chain availability.

Substiute Parts

P4SMA250AHM3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 790P4SMA250AHM3_A/I Datasheet

Current PartRFQ

P4SMA250AHM3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1149P4SMA250AHM3_B/I Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P4SMA250AHM3_A/I is determined by strict equivalence across the following critical parameters:

• Voltage Rating: Reverse standoff voltage of 214V (Typ), breakdown voltage minimum of 237V, and clamping voltage maximum of 344V @ Ipp
• Current Handling: Peak pulse current of 870mA (10/1000µs pulse)
• Power Dissipation: Peak pulse power of 400W
• Package Compatibility: DO-214AC (SMA) surface mount package
• Electrical Configuration: Single unidirectional channel, Zener type
• Compliance & Qualification: AEC-Q101 automotive qualification, ROHS3 compliance, MSL 1

The substitute part P4SMA250AHM3_B/I matches all critical electrical and mechanical parameters. The primary distinction is packaging format (Tape & Reel vs. bulk) and product status (Active vs. Discontinued).

Parameter Comparison

Engineering Selection Recommendations

The P4SMA250AHM3_B/I is a direct functional equivalent to the P4SMA250AHM3_A/I. Both components are manufactured by Vishay General Semiconductor - Diodes Division and share identical electrical specifications, package geometry, and compliance certifications.

The P4SMA250AHM3_B/I is the recommended substitute due to its active product status and current availability. The component maintains full AEC-Q101 automotive qualification and ROHS3 compliance, ensuring compatibility with existing design requirements and regulatory obligations.

The only practical difference is the packaging format: the substitute is supplied in Tape & Reel (TR) format, which is standard for automated assembly processes. This packaging change does not affect electrical performance or mechanical fit on the PCB.

Frequently Asked Questions (FAQ)

Q: Are the P4SMA250AHM3_A/I and P4SMA250AHM3_B/I electrically identical?

A: Yes. Both components have identical voltage ratings (214V reverse standoff, 237V breakdown minimum, 344V clamping maximum), current handling (870mA peak pulse), power dissipation (400W), and operating temperature range (-65°C to 150°C). They are functionally interchangeable in circuit design.

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

A: The primary difference is packaging format. The P4SMA250AHM3_A/I is supplied in bulk packaging, while the P4SMA250AHM3_B/I is supplied in Tape & Reel (TR) format. Both use the same DO-214AC (SMA) surface mount package. The suffix designations (_A/I vs. _B/I) indicate different packaging configurations from the manufacturer.

Q: Can I use the P4SMA250AHM3_B/I as a direct replacement on my PCB?

A: Yes. The DO-214AC (SMA) package dimensions and pin configuration are identical. The component will fit the same PCB footprint and solder pads without modification. Tape & Reel packaging is compatible with standard pick-and-place assembly equipment.

Q: Are both parts AEC-Q101 qualified?

A: Yes. Both the P4SMA250AHM3_A/I and P4SMA250AHM3_B/I carry AEC-Q101 automotive qualification and are ROHS3 compliant with MSL 1 (unlimited moisture sensitivity level).

Q: Why is the original part discontinued?

A: The P4SMA250AHM3_A/I is discontinued at DiGi Electronics. The P4SMA250AHM3_B/I remains in active production and is the current recommended source for this voltage rating and package configuration.

Q: Are there any thermal or reliability differences?

A: No. Both components share identical thermal specifications (operating temperature -65°C to 150°C junction temperature) and reliability qualifications. The automotive-grade designation and AEC-Q101 certification apply equally to both parts.