P6SMB18AHE3_A/I Equivalent & Substitute Parts

Part Overview

The P6SMB18AHE3_A/I is a unidirectional transient voltage suppressor (TVS) diode from Vishay General Semiconductor - Diodes Division, designed for surface mount applications in the DO-214AA (SMB) package. This component provides transient overvoltage protection with a 15.3V reverse standoff voltage and 25.2V maximum clamping voltage at peak pulse current of 23.8A. The part is currently listed as obsolete, making identification of active equivalent alternatives essential for ongoing design support and procurement.

Substiute Parts

P6SMB18AHE3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 737P6SMB18AHE3_A/I Datasheet

Current PartRFQ

P6SMB18AHE3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 933P6SMB18AHE3_B/I Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P6SMB18AHE3_A/I is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff (Typ): 15.3V
• Voltage - Breakdown (Min): 17.1V
• Voltage - Clamping (Max) @ Ipp: 25.2V
• Current - Peak Pulse (10/1000µs): 23.8A
• 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 P6SMB18AHE3_B/I is classified as a manufacturer-recommended substitute. Both parts share identical electrical specifications and thermal performance characteristics. The primary distinction is product status: the _A/I variant is obsolete, while the _B/I variant maintains active production status. Both conform to the same automotive qualification standards and RoHS compliance requirements.

Parameter Comparison

Engineering Selection Recommendations

The P6SMB18AHE3_B/I is the direct substitute for the obsolete P6SMB18AHE3_A/I. Both components maintain identical electrical and thermal specifications, automotive-grade qualification, and AEC-Q101 certification. The _B/I variant is currently in active production status, ensuring long-term availability and supply chain continuity.

For new designs or production transitions, the P6SMB18AHE3_B/I should be selected. The primary operational difference is packaging format: the _A/I is supplied in bulk, while the _B/I is supplied in Tape & Reel format, which is standard for automated assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the P6SMB18AHE3_B/I be used as a direct replacement for the P6SMB18AHE3_A/I?

A: Yes. Both parts are electrically and mechanically identical across all critical parameters including voltage ratings, peak pulse current, power dissipation, operating temperature range, and package dimensions. The substitution is direct.

Q: What is the difference between the _A/I and _B/I designations?

A: The designations reflect manufacturing batches or revisions. The _A/I is obsolete, while the _B/I is actively produced. Electrically and functionally, they are equivalent.

Q: Are there packaging differences between these parts?

A: Yes. The P6SMB18AHE3_A/I is supplied in bulk packaging, while the P6SMB18AHE3_B/I is supplied in Tape & Reel format. Both use the same DO-214AA (SMB) component package. Tape & Reel packaging is standard for automated surface mount assembly.

Q: Do both parts meet automotive qualification requirements?

A: Yes. Both the P6SMB18AHE3_A/I and P6SMB18AHE3_B/I are automotive-grade components with AEC-Q101 qualification and ROHS3 compliance.

Q: What is the base product number for these parts?

A: The base product number is P6SMB18. The _A/I and _B/I suffixes indicate specific manufacturing variants within this product line.