SMBJ75AHM3_A/I Equivalent & Substitute Parts

Part Overview

The SMBJ75AHM3_A/I is a unidirectional Transient Voltage Suppressor (TVS) diode from Vishay General Semiconductor - Diodes Division, designed for telecom applications. This surface mount component in DO-214AA (SMB) package provides 75V reverse standoff voltage with 121V maximum clamping voltage and 5A peak pulse current capability. The part is currently listed as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and procurement.

Substiute Parts

SMBJ75AHM3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 959SMBJ75AHM3_A/I Datasheet

Current PartRFQ

SMBJ75AHM3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1145SMBJ75AHM3_B/I Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SMBJ75AHM3_A/I is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff: 75V (typical)
• Voltage - Breakdown: 83.3V (minimum)
• Voltage - Clamping: 121V (maximum at Ipp)
• Current - Peak Pulse: 5A (10/1000µs)
• Power - Peak Pulse: 600W
• Package: DO-214AA (SMB) surface mount
• Unidirectional configuration (single channel)
• Operating temperature range: -55°C to 150°C
• Automotive grade with AEC-Q101 qualification

The SMBJ75AHM3_B/I meets all these electrical and mechanical requirements and is classified as the manufacturer-recommended substitute. The primary distinction is product status: the original part is obsolete while the substitute is active, with identical electrical performance and packaging specifications.

Parameter Comparison

Engineering Selection Recommendations

The SMBJ75AHM3_B/I is the direct equivalent for the obsolete SMBJ75AHM3_A/I. Both parts are manufactured by Vishay and share identical electrical specifications, thermal performance, and automotive-grade certifications including AEC-Q101 qualification. The substitute part maintains full compliance with RoHS3 and REACH requirements.

The primary advantage of selecting SMBJ75AHM3_B/I is its active product status, ensuring long-term availability and supply chain continuity. The part is supplied in Tape & Reel (TR) packaging, which is standard for high-volume production environments. All electrical parameters, including voltage ratings, clamping characteristics, and peak pulse current, are identical to the original part, enabling direct PCB-level substitution without circuit redesign.

Frequently Asked Questions (FAQ)

Q: Can SMBJ75AHM3_B/I be used as a direct replacement for SMBJ75AHM3_A/I?

A: Yes. Both parts are identical in electrical performance, thermal range, package type (DO-214AA SMB), and automotive qualification. The substitute is the manufacturer-recommended replacement for the obsolete original part.

Q: Are there any differences in clamping voltage or peak pulse current between these parts?

A: No. Both parts specify 121V maximum clamping voltage at 5A peak pulse current (10/1000µs waveform). All voltage ratings and current specifications are identical.

Q: What is the difference between the packaging designations?

A: The original part (SMBJ75AHM3_A/I) does not specify a packaging format in the provided data. The substitute (SMBJ75AHM3_B/I) is supplied in Tape & Reel (TR) format, which is standard for automated assembly. Both use the same DO-214AA (SMB) component package.

Q: Are both parts AEC-Q101 qualified?

A: Yes. Both SMBJ75AHM3_A/I and SMBJ75AHM3_B/I carry AEC-Q101 qualification and automotive-grade designation, meeting automotive reliability standards.

Q: What is the operating temperature range for these TVS diodes?

A: Both parts operate across -55°C to 150°C junction temperature (TJ), providing full performance across automotive and industrial temperature extremes.

Q: Are there any compliance or regulatory differences?

A: No. Both parts are ROHS3 compliant and REACH unaffected, with identical regulatory status.