SMBJ26AHE3_A/I Equivalent & Substitute Parts

Part Overview

The SMBJ26AHE3_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 26V reverse standoff voltage and 42.1V maximum clamping voltage at peak pulse current of 14.3A. The part is classified as obsolete, necessitating identification of active equivalent alternatives to maintain design continuity and ensure supply chain availability for new production and maintenance applications.

Substiute Parts

SMBJ26AHE3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 886SMBJ26AHE3_A/I Datasheet

Current PartRFQ

SMBJ26AHE3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 878SMBJ26AHE3_B/I Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMBJ26AHE3_A/I is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff: 26V (±tolerance)
• Voltage - Breakdown (Min): 28.9V
• Voltage - Clamping (Max) @ Ipp: 42.1V
• Current - Peak Pulse (10/1000µs): 14.3A
• Power - Peak Pulse: 600W
• Type: Zener, Unidirectional
• Package: DO-214AA (SMB)
• Mounting: Surface Mount
• Operating Temperature Range: -55°C ~ 150°C (TJ)
• Automotive Grade with AEC-Q101 Qualification

The SMBJ26AHE3_B/I meets all these criteria and shares the same base product number (SMBJ26), confirming functional and mechanical compatibility. The primary distinction is product status: the _A/I variant is obsolete, while the _B/I variant is active, making it the direct replacement for ongoing applications.

Parameter Comparison

Engineering Selection Recommendations

The SMBJ26AHE3_B/I is the direct equivalent substitute for the SMBJ26AHE3_A/I. Both components are manufactured by Vishay General Semiconductor - Diodes Division and share identical electrical specifications, thermal ratings, and mechanical packaging. The _B/I variant maintains active product status, ensuring continued availability and supply chain support.

Both parts carry Automotive Grade classification with AEC-Q101 qualification, confirming suitability for automotive applications requiring transient voltage suppression. ROHS3 compliance and REACH unaffected status are maintained across both variants, satisfying regulatory requirements for industrial and automotive markets.

The transition from the obsolete _A/I to the active _B/I variant presents no functional, thermal, or mechanical constraints. Direct substitution is appropriate for all applications where the SMBJ26AHE3_A/I was originally specified.

Frequently Asked Questions (FAQ)

Q: Can the SMBJ26AHE3_B/I be used as a direct replacement for the SMBJ26AHE3_A/I?

A: Yes. Both parts are electrically and mechanically identical. The _B/I variant is the active production equivalent of the obsolete _A/I variant. All electrical parameters, thermal characteristics, and package specifications are identical, enabling direct substitution without circuit modification.

Q: Are there any packaging differences between these variants?

A: Both variants use the DO-214AA (SMB) surface mount package. The primary packaging difference is that the _B/I is available in Tape & Reel (TR) format, while the _A/I does not specify packaging format. This affects procurement and handling but does not impact component performance or PCB assembly compatibility.

Q: What are the critical parameters that define substitution eligibility?

A: Substitution is determined by equivalence in voltage ratings (26V reverse standoff, 28.9V breakdown minimum, 42.1V clamping maximum), peak pulse current (14.3A), power dissipation (600W), unidirectional topology, operating temperature range (-55°C to 150°C), and DO-214AA package specification. All these parameters are identical between the two variants.

Q: Are both parts suitable for automotive applications?

A: Yes. Both the SMBJ26AHE3_A/I and SMBJ26AHE3_B/I carry Automotive Grade classification and AEC-Q101 qualification, confirming compliance with automotive reliability and quality standards.

Q: What is the inventory status for these parts?

A: The SMBJ26AHE3_A/I (obsolete) has 793 pieces in stock. The SMBJ26AHE3_B/I (active) has 829 pieces in stock. For new designs and ongoing production, the _B/I variant should be specified to ensure long-term supply availability.