SMB8J15CAHM3_A/H Equivalent & Substitute Parts

Part Overview

The SMB8J15CAHM3_A/H is a bidirectional transient voltage suppressor (TVS) diode from Vishay General Semiconductor - Diodes Division, designed for telecom applications. This component features a 15V reverse standoff voltage with 24.4V maximum clamping voltage and 32.8A 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 continued system support and new designs.

Substiute Parts

SMB8J15CAHM3_A/H

Vishay General Semiconductor - Diodes DivisionIn Stock: 1127SMB8J15CAHM3_A/H Datasheet

Current PartRFQ

SMB8J15CAHM3_B/H

Vishay General Semiconductor - Diodes DivisionIn Stock: 1127SMB8J15CAHM3_B/H Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMB8J15CAHM3_A/H is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff: 15V (identical)
• Voltage - Breakdown (Min): 16.7V (identical)
• Current - Peak Pulse (10/1000µs): 32.8A (identical)
• Power - Peak Pulse: 800W (identical)
• Package / Case: DO-214AA, SMB (identical)
• Bidirectional Channels: 1 (identical)
• Operating Temperature Range: -55°C to 150°C (identical)
• Automotive Grade and AEC-Q101 Qualification (identical)
• RoHS3 Compliance (identical)

The SMB8J15CAHM3_B/H is qualified as a direct substitute based on matching all electrical performance specifications, mechanical package compatibility, and regulatory certifications. The primary distinction is product status: the _A/H variant is obsolete while the _B/H variant is active, with identical base product number SMB8J15 confirming design equivalence.

Parameter Comparison

Engineering Selection Recommendations

The SMB8J15CAHM3_B/H is the qualified substitute for the obsolete SMB8J15CAHM3_A/H. Both components maintain identical electrical specifications, mechanical compatibility, and regulatory compliance. The _B/H variant is currently in active production status, ensuring supply chain availability and long-term support.

Selection of the SMB8J15CAHM3_B/H is appropriate for:

• Direct replacement in existing designs using the _A/H variant
• New designs requiring 15V TVS diode protection in telecom applications
• Systems requiring automotive-grade components with AEC-Q101 qualification
• Applications demanding ROHS3 compliance and REACH compliance

No design modifications are required when transitioning from the _A/H to the _B/H variant due to identical package, pinout, and electrical performance characteristics.

Frequently Asked Questions (FAQ)

Q: Can SMB8J15CAHM3_B/H directly replace SMB8J15CAHM3_A/H without circuit modifications?

A: Yes. Both parts are identical in electrical performance, package type (DO-214AA, SMB), pinout configuration, and operating specifications. Direct substitution is possible without circuit redesign.

Q: What is the primary reason for substitution?

A: The SMB8J15CAHM3_A/H is classified as obsolete. The SMB8J15CAHM3_B/H is the active equivalent from the same manufacturer, ensuring continued availability and supply chain support.

Q: Are there any compliance or certification differences?

A: No. Both variants maintain identical automotive grade classification, AEC-Q101 qualification, ROHS3 compliance, and REACH unaffected status.

Q: What are the critical electrical parameters that define substitution eligibility?

A: Substitution is determined by matching: 15V reverse standoff voltage, 16.7V minimum breakdown voltage, 32.8A peak pulse current, 800W peak pulse power, and identical operating temperature range (-55°C to 150°C).

Q: Is the DO-214AA (SMB) package identical between both parts?

A: Yes. Both components use the same surface mount DO-214AA (SMB) package, ensuring mechanical and thermal compatibility on PCBs designed for the original part.

Q: What applications are these TVS diodes designed for?

A: Both variants are specified for telecom applications requiring transient voltage suppression and overvoltage protection in bidirectional configurations.