SMB10J18AHM3_A/I Equivalent & Substitute Parts

Part Overview

The SMB10J18AHM3_A/I is a unidirectional Transient Voltage Suppressor (TVS) diode from Vishay General Semiconductor - Diodes Division, designed for telecom applications. This component features a 18V reverse standoff voltage with 29.2V maximum clamping voltage and 34.2A peak pulse current capability in a surface mount DO-214AA (SMB) package. The part is currently listed as obsolete, necessitating identification of active equivalent alternatives to maintain design continuity and ensure supply chain availability.

Substiute Parts

SMB10J18AHM3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1061SMB10J18AHM3_A/I Datasheet

Current PartRFQ

SMB10J18AHM3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1046SMB10J18AHM3_B/I Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMB10J18AHM3_A/I is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff: 18V (±tolerance)
• Voltage - Breakdown (Min): 20V
• Voltage - Clamping (Max) @ Ipp: 29.2V
• Current - Peak Pulse (10/1000µs): 34.2A
• Power - Peak Pulse: 1000W
• Package / Case: DO-214AA (SMB)
• Mounting Type: Surface Mount
• Operating Temperature Range: -55°C ~ 150°C
• Automotive Grade and AEC-Q101 Qualification

The SMB10J18AHM3_B/I is the manufacturer-recommended substitute, maintaining identical electrical specifications and package configuration while offering active product status and improved supply availability.

Parameter Comparison

Engineering Selection Recommendations

The SMB10J18AHM3_B/I is the direct equivalent for the obsolete SMB10J18AHM3_A/I. Both components maintain identical electrical performance specifications and automotive-grade qualifications. The primary distinction is product status: the substitute is active and maintains current manufacturing support, while the original is obsolete.

Selection of the SMB10J18AHM3_B/I ensures:

• Full electrical and thermal equivalence for existing circuit designs
• Continued compliance with AEC-Q101 automotive qualification requirements
• ROHS3 compliance and REACH unaffected status maintained
• Sustained supply chain availability through active production

The packaging difference (Tape & Reel for the substitute versus bulk for the original) reflects standard modern distribution practices and does not affect component performance or PCB assembly compatibility.

Frequently Asked Questions (FAQ)

Q: Can SMB10J18AHM3_B/I be used as a direct replacement for SMB10J18AHM3_A/I?

A: Yes. Both components are identical in electrical specifications, thermal performance, package configuration, and automotive qualifications. The substitute is the manufacturer-recommended replacement for the obsolete original.

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

A: The suffix designations (_A/I versus _B/I) indicate different manufacturing batches or revisions. The electrical and mechanical specifications remain unchanged. The primary operational difference is that SMB10J18AHM3_A/I is obsolete while SMB10J18AHM3_B/I is active.

Q: Does the Tape & Reel packaging of the substitute affect circuit performance?

A: No. Tape & Reel is a distribution format only and does not alter component electrical characteristics, thermal behavior, or reliability. It is standard for active production components.

Q: Are both parts qualified for automotive applications?

A: Yes. Both components carry Automotive Grade designation and AEC-Q101 qualification, meeting automotive reliability and quality standards.

Q: What is the operating temperature range for both parts?

A: Both the SMB10J18AHM3_A/I and SMB10J18AHM3_B/I operate across -55°C to 150°C junction temperature, suitable for automotive and telecom environments.

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

A: No. Both components maintain ROHS3 compliance and REACH unaffected status. Regulatory and environmental compliance is identical.