P6SMB91AHE3_A/I Equivalent & Substitute Parts

Part Overview

The P6SMB91AHE3_A/I is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This component operates as a 77.8V reverse standoff device with a 125V maximum clamping voltage and 4.8A peak pulse current rating in a surface mount DO-214AA (SMB) package. The part is currently classified as obsolete, necessitating identification of active equivalent alternatives to maintain design continuity and ensure supply chain availability for new production and field replacements.

Substiute Parts

P6SMB91AHE3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1017P6SMB91AHE3_A/I Datasheet

Current PartRFQ

P6SMB91AHE3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1190P6SMB91AHE3_B/I Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P6SMB91AHE3_A/I is determined by strict equivalence across the following electrical and mechanical 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)
• Mounting Type: Surface Mount
• Operating Temperature Range: -65°C to 150°C (TJ)
• Grade: Automotive
• Qualification: AEC-Q101

The P6SMB91AHE3_B/I is classified as a manufacturer-recommended substitute. Both parts share identical electrical specifications, thermal operating range, automotive grade qualification, and package configuration. The primary distinction is product status: the original part is obsolete, while the substitute is active. The substitute is available in Tape & Reel (TR) packaging, providing improved supply chain availability.

Parameter Comparison

Engineering Selection Recommendations

The P6SMB91AHE3_B/I is the direct equivalent for the obsolete P6SMB91AHE3_A/I. Both parts are manufactured by Vishay and carry identical electrical ratings, thermal specifications, and automotive-grade AEC-Q101 qualification. The substitute maintains full compatibility with existing circuit designs and PCB layouts due to identical package configuration (DO-214AA SMB) and mounting type (surface mount).

The primary advantage of selecting the P6SMB91AHE3_B/I is active product status and improved availability. The substitute is supplied in Tape & Reel (TR) packaging, which is standard for high-volume production environments. Both parts meet ROHS3 and REACH compliance requirements, ensuring regulatory alignment for automotive and industrial applications.

Frequently Asked Questions (FAQ)

Q: Can the P6SMB91AHE3_B/I be used as a direct replacement for the P6SMB91AHE3_A/I?

A: Yes. Both parts are electrically and mechanically identical. They share the same voltage ratings (77.8V reverse standoff, 125V clamping), current specifications (4.8A peak pulse), power rating (600W), operating temperature range (-65°C to 150°C), and package configuration (DO-214AA SMB). No circuit modifications are required.

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

A: The primary difference is product status. The P6SMB91AHE3_A/I is obsolete, while the P6SMB91AHE3_B/I is active. The substitute is available in Tape & Reel packaging, providing better supply chain availability for production environments.

Q: Are there any compliance or qualification differences?

A: No. Both parts carry identical certifications: Automotive grade, AEC-Q101 qualification, ROHS3 compliance, and REACH unaffected status. They are suitable for the same applications and regulatory environments.

Q: Is the DO-214AA (SMB) package identical between both parts?

A: Yes. Both parts use the same surface mount DO-214AA (SMB) package. PCB footprints, soldering procedures, and thermal management considerations are identical.

Q: Which part should be selected for new designs?

A: The P6SMB91AHE3_B/I should be selected for new designs due to active product status and standard production packaging (Tape & Reel). This ensures long-term supply chain stability and compatibility with standard manufacturing processes.