SMBJ85CAHM3_A/I Equivalent & Substitute Parts

Part Overview

The SMBJ85CAHM3_A/I is a bidirectional transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This component is designed for telecom applications requiring transient overvoltage protection in surface mount configurations. The part operates with an 85V reverse standoff voltage and provides 137V maximum clamping voltage at peak pulse current of 4.4A, delivering 600W peak pulse power dissipation.

The SMBJ85CAHM3_A/I is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this TVS diode specification.

Substiute Parts

SMBJ85CAHM3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 815SMBJ85CAHM3_A/I Datasheet

Current PartRFQ

SMBJ85CAHM3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1032SMBJ85CAHM3_B/I Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMBJ85CAHM3_A/I is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff: 85V (±5% tolerance)
• Voltage - Breakdown (Min): 94.4V
• Voltage - Clamping (Max) @ Ipp: 137V
• Current - Peak Pulse (10/1000µs): 4.4A
• Power - Peak Pulse: 600W
• Bidirectional Channels: 1
• Package / Case: DO-214AA, SMB
• Mounting Type: Surface Mount
• Operating Temperature Range: -55°C to 150°C (TJ)
• Grade: Automotive
• Qualification: AEC-Q101

The SMBJ85CAHM3_B/I is classified as a manufacturer-recommended substitute. This part maintains identical electrical specifications and mechanical compatibility while offering active product status and improved supply availability.

Parameter Comparison

Engineering Selection Recommendations

The SMBJ85CAHM3_B/I is the direct equivalent substitute for the obsolete SMBJ85CAHM3_A/I. Both components are manufactured by Vishay General Semiconductor - Diodes Division and maintain identical electrical and mechanical specifications. The substitute part carries active product status, ensuring continued availability and manufacturing support.

Both parts meet automotive-grade requirements with AEC-Q101 qualification, confirming suitability for automotive and industrial telecom applications. Compliance with ROHS3 and REACH regulations is maintained across both variants. The packaging difference (Tape & Reel for the substitute versus unspecified for the main part) does not affect electrical or mechanical compatibility and reflects standard manufacturing and distribution practices.

Selection of the SMBJ85CAHM3_B/I eliminates obsolescence risk while preserving full functional and physical compatibility with existing designs.

Frequently Asked Questions (FAQ)

Q: Can the SMBJ85CAHM3_B/I be used as a direct replacement for the SMBJ85CAHM3_A/I?

A: Yes. Both parts are electrically and mechanically identical. All critical parameters—voltage ratings, current ratings, power dissipation, temperature range, package type, and automotive qualification—are equivalent. The substitute part is manufacturer-recommended.

Q: What is the difference between the SMBJ85CAHM3_A/I and SMBJ85CAHM3_B/I?

A: The primary difference is product status. The SMBJ85CAHM3_A/I is obsolete, while the SMBJ85CAHM3_B/I is active. The substitute is supplied in Tape & Reel packaging. Electrical specifications and mechanical compatibility are identical.

Q: Are both parts suitable for automotive applications?

A: Yes. Both the SMBJ85CAHM3_A/I and SMBJ85CAHM3_B/I carry automotive-grade classification and AEC-Q101 qualification, confirming suitability for automotive and industrial telecom environments.

Q: Does the packaging format affect compatibility?

A: No. The packaging format (Tape & Reel versus bulk) does not affect electrical performance or mechanical fit. Both parts use the DO-214AA (SMB) surface mount package and are compatible with standard PCB assembly processes.

Q: Are there any compliance or regulatory differences?

A: No. Both parts maintain identical ROHS3 compliance and REACH unaffected status. Regulatory and environmental compliance requirements are fully satisfied by either part.

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

A: Both parts operate across -55°C to 150°C junction temperature (TJ), providing equivalent thermal performance for telecom and automotive applications.