SMBJ40AHM3_A/I Equivalent & Substitute Parts

Part Overview

The SMBJ40AHM3_A/I is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, designed for telecom applications requiring transient overvoltage protection. This component features a 40V reverse standoff voltage with a 64.5V maximum clamping voltage and 9.3A peak pulse current capability 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.

Substiute Parts

SMBJ40AHM3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1103SMBJ40AHM3_A/I Datasheet

Current PartRFQ

SMBJ40AHM3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1177SMBJ40AHM3_B/I Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMBJ40AHM3_A/I is determined by strict equivalence across the following critical electrical and mechanical parameters:

• Voltage - Reverse Standoff (Typ): 40V
• Voltage - Breakdown (Min): 44.4V
• Voltage - Clamping (Max) @ Ipp: 64.5V
• Current - Peak Pulse (10/1000µs): 9.3A
• 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 SMBJ40AHM3_B/I is classified as a manufacturer-recommended substitute. This part maintains identical electrical specifications and thermal performance while differing only in product status (Active vs. Obsolete) and packaging format (Tape & Reel vs. standard packaging). The active status of the SMBJ40AHM3_B/I ensures continued availability and manufacturing support.

Parameter Comparison

Engineering Selection Recommendations

The SMBJ40AHM3_B/I is the direct substitute for the obsolete SMBJ40AHM3_A/I. Both parts are manufactured by Vishay and maintain identical electrical and thermal specifications. The SMBJ40AHM3_B/I carries Active product status, ensuring ongoing manufacturing support, availability, and compliance with current supply chain requirements. Both parts meet automotive-grade specifications with AEC-Q101 qualification and ROHS3 compliance, making them suitable for equivalent circuit implementations in telecom protection applications.

Frequently Asked Questions (FAQ)

Q: Can the SMBJ40AHM3_B/I be used as a direct replacement for the SMBJ40AHM3_A/I?

A: Yes. The SMBJ40AHM3_B/I is the manufacturer-recommended substitute. Both parts share identical electrical characteristics, thermal performance, package type (DO-214AA, SMB), and automotive qualifications. The primary difference is product status and packaging format.

Q: What is the difference between the SMBJ40AHM3_A/I and SMBJ40AHM3_B/I?

A: The SMBJ40AHM3_A/I is classified as obsolete, while the SMBJ40AHM3_B/I is active. The SMBJ40AHM3_B/I is supplied in Tape & Reel format. All electrical and mechanical specifications remain identical.

Q: Are there any compatibility concerns when switching from SMBJ40AHM3_A/I to SMBJ40AHM3_B/I?

A: No compatibility concerns exist. Both parts use the same DO-214AA (SMB) surface mount package, operate across the same temperature range (-55°C to 150°C), and provide identical voltage and current ratings for transient suppression.

Q: Does the Tape & Reel packaging of the SMBJ40AHM3_B/I affect circuit performance?

A: No. Tape & Reel is a supply format only and does not affect electrical performance or circuit functionality. The component itself remains identical.

Q: Are both parts compliant with automotive standards?

A: Yes. Both the SMBJ40AHM3_A/I and SMBJ40AHM3_B/I are automotive-grade components with AEC-Q101 qualification and ROHS3 compliance.