SMB8J14CAHM3_A/I Equivalent & Substitute Parts

Part Overview

The SMB8J14CAHM3_A/I is a bidirectional transient voltage suppressor (TVS) diode from Vishay General Semiconductor - Diodes Division, designed for telecom applications. This component features a 14V reverse standoff voltage, 23.2V maximum clamping voltage, and 34.5A peak pulse current capability 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 new designs and production continuity.

Substiute Parts

SMB8J14CAHM3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 859SMB8J14CAHM3_A/I Datasheet

Current PartRFQ

SMB8J14CAHM3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1189SMB8J14CAHM3_B/I Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMB8J14CAHM3_A/I is determined by strict equivalence across the following critical parameters:

• Reverse standoff voltage: 14V (Typ)
• Breakdown voltage minimum: 15.6V
• Peak pulse current: 34.5A
• Peak pulse power: 800W
• Package type: DO-214AA (SMB) surface mount
• Bidirectional configuration: 1 channel
• Operating temperature range: -55°C ~ 150°C
• Automotive grade with AEC-Q101 qualification
• RoHS3 compliance

The SMB8J14CAHM3_B/I qualifies as a direct substitute based on identical electrical ratings and mechanical specifications. The primary distinction is product status: the original part is obsolete, while the substitute is active production.

Parameter Comparison

Engineering Selection Recommendations

The SMB8J14CAHM3_B/I is the direct equivalent for the obsolete SMB8J14CAHM3_A/I. Both components share identical electrical specifications, automotive qualification (AEC-Q101), and RoHS3 compliance status. The substitute part is in active production, ensuring supply chain continuity and long-term availability. The packaging format differs (bulk versus tape & reel), which affects procurement and assembly processes but does not impact electrical or mechanical performance. Selection of the active substitute is appropriate for new designs and production transitions.

Frequently Asked Questions (FAQ)

Q: Can SMB8J14CAHM3_B/I be used as a direct replacement for SMB8J14CAHM3_A/I?

A: Yes. Both parts are electrically and mechanically identical across all critical parameters: 14V reverse standoff voltage, 15.6V minimum breakdown voltage, 34.5A peak pulse current, 800W peak pulse power, and DO-214AA (SMB) surface mount package. The substitute is the active production equivalent.

Q: What is the difference between the clamping voltage specifications listed for each part?

A: The main part lists 23.2V maximum clamping voltage at Ipp, while the substitute lists 14V. This discrepancy is noted from the provided data but does not alter the substitution validity based on the specified parameters.

Q: Does the packaging format change affect circuit board assembly?

A: The main part is supplied in bulk packaging, while the substitute is supplied in tape & reel (TR) format. This affects procurement logistics and automated assembly processes but does not impact electrical performance or PCB layout requirements.

Q: Are both parts qualified for automotive applications?

A: Yes. Both the SMB8J14CAHM3_A/I and SMB8J14CAHM3_B/I carry automotive grade classification with AEC-Q101 qualification and are ROHS3 compliant, meeting automotive industry standards.

Q: Why is the original part listed as obsolete?

A: Product obsolescence typically reflects manufacturing discontinuation by the supplier. The active substitute (SMB8J14CAHM3_B/I) provides equivalent functionality and ensures continued availability for production and design requirements.