SMBJ48AHM3_A/I Equivalent & Substitute Parts

Part Overview

The SMBJ48AHM3_A/I is a unidirectional Transient Voltage Suppressor (TVS) diode from Vishay General Semiconductor - Diodes Division, part of the TransZorb® series. This surface mount component is designed for telecom applications requiring transient voltage protection. The part is currently classified as obsolete, making identification of suitable substitutes essential for ongoing design support and procurement.

Substiute Parts

SMBJ48AHM3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 686SMBJ48AHM3_A/I Datasheet

Current PartRFQ

SMBJ48AHM3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 862SMBJ48AHM3_B/I Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SMBJ48AHM3_A/I is determined by strict equivalence across the following critical parameters:

• Voltage Rating: Reverse standoff voltage of 48V, breakdown minimum of 53.3V, and clamping voltage maximum of 77.4V at peak pulse current
• Current Handling: Peak pulse current of 7.8A at 10/1000µs pulse duration
• Power Dissipation: 600W peak pulse power rating
• Package Compatibility: DO-214AA (SMB) surface mount package
• Electrical Characteristics: Unidirectional channel configuration with zener-type operation
• Environmental Compliance: Automotive grade with AEC-Q101 qualification, operating across -55°C to 150°C junction temperature range

The substitute part must maintain identical electrical performance across all voltage and current parameters while preserving the same physical package footprint and thermal characteristics.

Parameter Comparison

Engineering Selection Recommendations

The SMBJ48AHM3_B/I is the direct substitute for the obsolete SMBJ48AHM3_A/I. Both parts are manufactured by Vishay General Semiconductor - Diodes Division and maintain identical electrical specifications across all critical parameters: 48V reverse standoff voltage, 53.3V minimum breakdown voltage, 77.4V maximum clamping voltage, 7.8A peak pulse current, and 600W peak pulse power rating.

The primary distinction is product status: SMBJ48AHM3_A/I is obsolete while SMBJ48AHM3_B/I is active. Both parts carry automotive grade classification with AEC-Q101 qualification, ensuring compliance with automotive reliability standards. Both are ROHS3 compliant and REACH unaffected, meeting current environmental regulations.

The SMBJ48AHM3_B/I is supplied in Tape & Reel (TR) packaging, which is standard for high-volume production environments. The identical DO-214AA (SMB) package footprint ensures direct PCB compatibility without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can SMBJ48AHM3_B/I be used as a direct replacement for SMBJ48AHM3_A/I?

A: Yes. Both parts are electrically identical across all specified parameters: voltage ratings, current handling, power dissipation, and temperature range. The package footprint is identical (DO-214AA/SMB), enabling direct PCB substitution without design changes.

Q: What is the difference between SMBJ48AHM3_A/I and SMBJ48AHM3_B/I?

A: The primary difference is product status. SMBJ48AHM3_A/I is obsolete, while SMBJ48AHM3_B/I is active. SMBJ48AHM3_B/I is supplied in Tape & Reel packaging. All electrical and mechanical specifications are identical.

Q: Are both parts qualified for automotive applications?

A: Yes. Both SMBJ48AHM3_A/I and SMBJ48AHM3_B/I carry automotive grade classification and hold AEC-Q101 qualification, meeting automotive reliability and quality standards.

Q: Does the packaging format affect electrical performance?

A: No. Tape & Reel packaging is a supply format only and does not affect the electrical characteristics or performance of the TVS diode. The component itself remains identical.

Q: Are there any compliance differences between the two parts?

A: No. Both parts are ROHS3 compliant and REACH unaffected. Environmental and regulatory compliance is equivalent.

Q: What are the critical parameters for TVS diode substitution?

A: For TVS diode substitution, the following parameters must match: reverse standoff voltage, breakdown voltage, clamping voltage, peak pulse current rating, peak pulse power rating, operating temperature range, and package type. All these parameters are identical between SMBJ48AHM3_A/I and SMBJ48AHM3_B/I.