P6SMB91AHM3_A/I Equivalent & Substitute Parts

Part Overview

The P6SMB91AHM3_A/I is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This component is designed for telecom applications requiring transient voltage protection with a 125V clamping voltage and 4.8A peak pulse current capability in a surface mount DO-214AA (SMB) package. The part is currently listed as obsolete, necessitating identification of active equivalent alternatives to maintain design continuity and ensure supply chain availability.

Substiute Parts

P6SMB91AHM3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 893P6SMB91AHM3_A/I Datasheet

Current PartRFQ

P6SMB91AHM3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 958P6SMB91AHM3_B/I Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P6SMB91AHM3_A/I is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff (Typ): 77.8V
• Voltage - Breakdown (Min): 86.5V
• Voltage - Clamping (Max) @ Ipp: 125V
• Current - Peak Pulse (10/1000µs): 4.8A
• Power - Peak Pulse: 600W
• Package / Case: DO-214AA (SMB)
• Unidirectional Channels: 1
• Operating Temperature Range: -65°C ~ 150°C (TJ)
• Automotive Grade and AEC-Q101 Qualification

The substitute part P6SMB91AHM3_B/I maintains identical electrical and mechanical specifications while offering active product status and improved supply availability.

Parameter Comparison

Engineering Selection Recommendations

The P6SMB91AHM3_B/I is the direct equivalent substitute for the obsolete P6SMB91AHM3_A/I. Both parts are manufactured by Vishay General Semiconductor - Diodes Division and share identical electrical specifications, thermal operating range, and automotive-grade qualification (AEC-Q101). The substitute part maintains ROHS3 compliance and REACH unaffected status.

The primary distinction is product status: P6SMB91AHM3_B/I is active and available in Tape & Reel packaging, whereas the original part is obsolete. For new designs or component replenishment, P6SMB91AHM3_B/I is the appropriate selection to ensure long-term supply chain continuity and manufacturing support.

Frequently Asked Questions (FAQ)

Q: Can P6SMB91AHM3_B/I be used as a direct replacement for P6SMB91AHM3_A/I?

A: Yes. Both parts are identical in electrical performance, thermal characteristics, package type (DO-214AA SMB), and automotive qualification. The substitute part is the active equivalent.

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

A: The primary difference is product lifecycle status. P6SMB91AHM3_A/I is obsolete, while P6SMB91AHM3_B/I is active. The suffix designations (_A/I versus _B/I) indicate different manufacturing batches or revisions, but electrical and mechanical specifications remain equivalent.

Q: Are there packaging differences between these parts?

A: Yes. P6SMB91AHM3_A/I is supplied in bulk packaging, while P6SMB91AHM3_B/I is supplied in Tape & Reel (TR) format. Both use the same DO-214AA (SMB) component package for PCB mounting.

Q: Does the substitute part meet automotive and compliance requirements?

A: Yes. P6SMB91AHM3_B/I maintains Automotive Grade classification, AEC-Q101 qualification, ROHS3 compliance, and REACH unaffected status, identical to the original part.

Q: What are the critical electrical parameters for substitution?

A: Substitution is valid when the following parameters match: 77.8V reverse standoff voltage, 86.5V minimum breakdown voltage, 125V maximum clamping voltage, 4.8A peak pulse current, and 600W peak pulse power rating.