SMBJ7.5AHM3_A/I Equivalent & Substitute Parts

Part Overview

The SMBJ7.5AHM3_A/I is a unidirectional Transient Voltage Suppressor (TVS) diode from Vishay General Semiconductor - Diodes Division, designed for telecom applications. This component features a 7.5V reverse standoff voltage with a 12.9V maximum clamping voltage and 46.5A peak pulse current capability in a surface mount DO-214AA (SMB) package. The part is classified as obsolete, making identification of active equivalent alternatives essential for ongoing design support and procurement.

Substiute Parts

SMBJ7.5AHM3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 972SMBJ7.5AHM3_A/I Datasheet

Current PartRFQ

SMBJ7.5AHM3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 817SMBJ7.5AHM3_B/I Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMBJ7.5AHM3_A/I is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff (Typ): 7.5V
• Voltage - Breakdown (Min): 8.33V
• Voltage - Clamping (Max) @ Ipp: 12.9V
• Current - Peak Pulse (10/1000µs): 46.5A
• Power - Peak Pulse: 600W
• Unidirectional Channels: 1
• Package / Case: DO-214AA, SMB
• Mounting Type: Surface Mount
• Operating Temperature Range: -55°C ~ 150°C (TJ)
• Grade: Automotive
• Qualification: AEC-Q101

The SMBJ7.5AHM3_B/I is identified as the manufacturer-recommended substitute. This part maintains identical electrical specifications and thermal characteristics while differing only in packaging format (Tape & Reel) and product status (Active vs. Obsolete).

Parameter Comparison

Engineering Selection Recommendations

The SMBJ7.5AHM3_B/I is the direct equivalent for the obsolete SMBJ7.5AHM3_A/I. Both parts are manufactured by Vishay and maintain identical electrical and thermal performance specifications. The primary distinction is product status: the SMBJ7.5AHM3_B/I is currently active in production, ensuring long-term availability and supply chain continuity.

Both parts carry automotive-grade qualification (AEC-Q101) and ROHS3 compliance, meeting the same regulatory and environmental standards. The packaging format difference (Tape & Reel for the substitute) is a standard industry variation that does not affect component functionality or performance in circuit applications.

For new designs or ongoing production requiring this TVS diode specification, the SMBJ7.5AHM3_B/I is the appropriate selection due to its active status and manufacturer support.

Frequently Asked Questions (FAQ)

Q: Can the SMBJ7.5AHM3_B/I be used as a direct replacement for the SMBJ7.5AHM3_A/I?

A: Yes. Both parts are electrically and thermally identical, with matching voltage ratings (7.5V reverse standoff, 12.9V clamping), current specifications (46.5A peak pulse), and power dissipation (600W). They share the same DO-214AA (SMB) package and mounting characteristics.

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

A: The primary difference is product status and packaging format. The SMBJ7.5AHM3_A/I is obsolete, while the SMBJ7.5AHM3_B/I is active. The substitute is supplied in Tape & Reel format, which is standard for high-volume procurement and automated assembly.

Q: Are there any compatibility concerns when switching from SMBJ7.5AHM3_A/I to SMBJ7.5AHM3_B/I?

A: No. Both parts are pin-compatible, footprint-compatible, and functionally equivalent. They can be used interchangeably in the same circuit without design modifications.

Q: Do both parts meet automotive qualification requirements?

A: Yes. Both the SMBJ7.5AHM3_A/I and SMBJ7.5AHM3_B/I carry AEC-Q101 automotive qualification and are ROHS3 compliant, meeting the same regulatory standards.

Q: Why should I transition to the SMBJ7.5AHM3_B/I?

A: The SMBJ7.5AHM3_B/I is the active equivalent with ongoing manufacturer support and guaranteed long-term availability. Using an active part eliminates obsolescence risk and ensures consistent supply for production.