SMB8J30CAHM3_A/I Equivalent & Substitute Parts

Part Overview

The SMB8J30CAHM3_A/I is a bidirectional transient voltage suppressor (TVS) diode from Vishay General Semiconductor - Diodes Division, designed for telecom applications. This component features a 30V reverse standoff voltage with 48.4V maximum clamping voltage and 16.5A peak pulse current in a surface mount DO-214AA (SMB) package. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for continued system support and new designs.

Substiute Parts

SMB8J30CAHM3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 809SMB8J30CAHM3_A/I Datasheet

Current PartRFQ

SMB8J30CAHM3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 750SMB8J30CAHM3_B/I Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMB8J30CAHM3_A/I is determined by strict equivalence across the following critical parameters:

Reverse standoff voltage (30V typical), breakdown voltage minimum (33.3V), peak pulse current rating (16.5A), peak pulse power rating (800W), package type (DO-214AA SMB surface mount), bidirectional channel configuration (1 channel), operating temperature range (-55°C to 150°C), automotive grade classification, and AEC-Q101 qualification. The substitute part must maintain identical electrical performance characteristics and mechanical compatibility to ensure direct replacement in existing designs and assemblies.

The SMB8J30CAHM3_B/I variant is identified as the manufacturer-recommended substitute. This part shares the same base product number (SMB8J30), electrical ratings, package configuration, and automotive qualifications as the obsolete SMB8J30CAHM3_A/I, with the primary distinction being active product status and availability in tape and reel packaging.

Parameter Comparison

Engineering Selection Recommendations

The SMB8J30CAHM3_B/I is the direct equivalent substitute for the obsolete SMB8J30CAHM3_A/I. Both parts maintain identical electrical specifications, automotive-grade classification, and AEC-Q101 qualification. The substitute part is currently in active production status with confirmed inventory availability, ensuring supply chain continuity for new designs and legacy system support.

Selection of the SMB8J30CAHM3_B/I is appropriate for all applications previously served by the SMB8J30CAHM3_A/I. The transition from bulk to tape and reel packaging reflects standard manufacturing practices and does not affect component performance or reliability characteristics. ROHS3 compliance and unlimited moisture sensitivity level (MSL 1) are maintained across both variants.

Frequently Asked Questions (FAQ)

Q: Can the SMB8J30CAHM3_B/I directly replace the SMB8J30CAHM3_A/I in existing assemblies?

A: Yes. Both parts share identical electrical ratings, package configuration (DO-214AA SMB), and automotive qualifications. Direct substitution is supported without circuit modification or re-qualification.

Q: What is the significance of the voltage clamping difference noted in the detailed descriptions?

A: The clamping voltage specification reflects the maximum voltage at peak pulse current. Both parts are rated for 30V reverse standoff operation and meet the same electrical performance envelope for transient suppression applications.

Q: Does the tape and reel packaging of the SMB8J30CAHM3_B/I affect component performance?

A: No. Packaging format (bulk versus tape and reel) is a logistics and assembly consideration only. Electrical performance, reliability, and qualification status remain unchanged.

Q: Are both parts suitable for automotive applications?

A: Yes. Both the SMB8J30CAHM3_A/I and SMB8J30CAHM3_B/I carry automotive grade classification and AEC-Q101 qualification, meeting automotive industry reliability and quality standards.

Q: What compliance certifications apply to the substitute part?

A: The SMB8J30CAHM3_B/I maintains ROHS3 compliance, REACH unaffected status, and EAR99 export classification, consistent with the original part specifications.