SMBJ45AHE3_A/I Equivalent & Substitute Parts

Part Overview

The SMBJ45AHE3_A/I is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This component is designed for surface mount applications in the DO-214AA (SMB) package and provides transient overvoltage protection with a 45V reverse standoff voltage and 72.7V maximum clamping voltage. The part is currently listed as obsolete, making identification of active equivalent parts essential for ongoing design support and procurement.

Substiute Parts

SMBJ45AHE3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 908SMBJ45AHE3_A/I Datasheet

Current PartRFQ

SMBJ45AHE3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1269SMBJ45AHE3_B/I Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMBJ45AHE3_A/I is determined by strict equivalence across the following critical electrical and mechanical parameters:

• Voltage - Reverse Standoff (Typ): 45V
• Voltage - Breakdown (Min): 50V
• Voltage - Clamping (Max) @ Ipp: 72.7V
• Current - Peak Pulse (10/1000µs): 8.3A
• Power - Peak Pulse: 600W
• Unidirectional Channels: 1
• Package / Case: DO-214AA, SMB
• Operating Temperature Range: -55°C ~ 150°C (TJ)
• Grade: Automotive
• Qualification: AEC-Q101

The SMBJ45AHE3_B/I is identified as the manufacturer-recommended substitute. This part maintains identical electrical specifications and automotive-grade qualification while transitioning from obsolete to active product status.

Parameter Comparison

Engineering Selection Recommendations

The SMBJ45AHE3_B/I is the direct equivalent for the obsolete SMBJ45AHE3_A/I. Both parts are manufactured by Vishay and share identical electrical performance specifications, automotive-grade classification, and AEC-Q101 qualification. The primary distinction is product status: the SMBJ45AHE3_B/I is currently active and available in higher inventory quantities (1180 Pcs), while the main part is obsolete.

For new designs or ongoing production requiring transient voltage suppression at 45V standoff with 600W peak pulse power in automotive applications, the SMBJ45AHE3_B/I provides full functional and electrical compatibility with the same DO-214AA (SMB) surface mount package.

Frequently Asked Questions (FAQ)

Q: Can SMBJ45AHE3_B/I be used as a direct replacement for SMBJ45AHE3_A/I?

A: Yes. Both parts are electrically and mechanically identical, with matching voltage ratings (45V standoff, 72.7V clamping), current handling (8.3A peak pulse), power dissipation (600W), operating temperature range (-55°C to 150°C), and package configuration (DO-214AA, SMB). Both carry automotive-grade classification and AEC-Q101 qualification.

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

A: The SMBJ45AHE3_B/I is the active production equivalent of the obsolete SMBJ45AHE3_A/I. The suffix change from _A/I to _B/I reflects a product revision while maintaining full electrical and mechanical compatibility.

Q: Are there any packaging differences?

A: The main part is specified without packaging detail, while the substitute is supplied in Tape & Reel (TR) format. Both use the DO-214AA (SMB) surface mount package, ensuring identical PCB footprint and assembly compatibility.

Q: Is the SMBJ45AHE3_B/I suitable for automotive applications?

A: Yes. The substitute part carries automotive-grade classification and AEC-Q101 qualification, meeting the same automotive reliability and qualification standards as the original part.

Q: What should be considered when transitioning from the obsolete part to the active substitute?

A: Since electrical and mechanical specifications are identical, no circuit redesign is required. Procurement should transition to the SMBJ45AHE3_B/I for continued supply assurance, as the original part is no longer in production.