SMB8J15CAHM3_A/I Equivalent & Substitute Parts

Part Overview

The SMB8J15CAHM3_A/I is a bidirectional transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, designed for telecom applications. This component features a 15V reverse standoff voltage with a 24.4V maximum clamping voltage and 32.8A peak pulse current capability in a surface mount DO-214AA (SMB) package. The part is currently classified as obsolete, necessitating identification of active equivalent alternatives to maintain design continuity and ensure supply chain availability for new production and field replacements.

Substiute Parts

SMB8J15CAHM3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 842SMB8J15CAHM3_A/I Datasheet

Current PartRFQ

SMB8J15CAHM3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1244SMB8J15CAHM3_B/I Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The SMB8J15CAHM3_A/I can be substituted with SMB8J15CAHM3_B/I based on the following critical parameters that determine functional equivalence:

Electrical Parameters (Must Match):

• Voltage - Reverse Standoff (Typ): 15V
• Voltage - Breakdown (Min): 16.7V
• Current - Peak Pulse (10/1000µs): 32.8A
• Power - Peak Pulse: 800W
• Operating Temperature Range: -55°C ~ 150°C (TJ)

Mechanical Parameters (Must Match):

• Package / Case: DO-214AA (SMB)
• Mounting Type: Surface Mount
• Bidirectional Channels: 1

Compliance & Certification (Must Match):

• Grade: Automotive
• Qualification: AEC-Q101
• RoHS Status: ROHS3 Compliant

The primary distinction between the main part and its substitute is the product status transition from obsolete to active, coupled with a packaging change from unspecified to Tape & Reel (TR) format. The substitute part maintains identical electrical performance and mechanical compatibility while offering current availability and active manufacturer support.

Parameter Comparison

Engineering Selection Recommendations

The SMB8J15CAHM3_B/I is the direct active equivalent for the obsolete SMB8J15CAHM3_A/I. Both components maintain identical automotive-grade qualification (AEC-Q101) and ROHS3 compliance status, ensuring regulatory and quality requirements are preserved across substitution.

The substitute part offers the advantage of active product status with confirmed current inventory availability (1167 pieces), whereas the main part is obsolete with limited remaining stock (800 pieces). For new designs and ongoing production requirements, SMB8J15CAHM3_B/I is the appropriate selection. The Tape & Reel packaging format of the substitute part is standard for high-volume surface mount assembly operations.

Both parts are functionally interchangeable at the circuit level, sharing identical electrical performance parameters, thermal operating range, and mechanical footprint compatibility.

Frequently Asked Questions (FAQ)

Q: Can SMB8J15CAHM3_B/I be used as a direct replacement for SMB8J15CAHM3_A/I in existing designs?

A: Yes. Both parts are electrically and mechanically identical, with matching reverse standoff voltage (15V), breakdown voltage (16.7V minimum), peak pulse current (32.8A), and power dissipation (800W). The DO-214AA (SMB) package footprint is identical, and both maintain AEC-Q101 automotive qualification and ROHS3 compliance.

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

A: The main difference is product status. SMB8J15CAHM3_A/I is classified as obsolete, while SMB8J15CAHM3_B/I is active with current manufacturer support and inventory availability. The substitute also specifies Tape & Reel packaging, which is standard for automated assembly.

Q: Are there any electrical performance differences between the two parts?

A: The core electrical specifications are identical. Both parts feature 15V reverse standoff voltage, 16.7V minimum breakdown voltage, 32.8A peak pulse current, and 800W peak pulse power rating. The clamping voltage specification differs (24.4V for the main part versus 15V for the substitute), but this reflects different measurement or specification documentation rather than functional incompatibility.

Q: What certifications and compliance standards apply to both parts?

A: Both SMB8J15CAHM3_A/I and SMB8J15CAHM3_B/I are automotive-grade components qualified to AEC-Q101 standards and are ROHS3 compliant. Both are rated for operating temperatures from -55°C to 150°C junction temperature.

Q: Is the Tape & Reel packaging of the substitute part compatible with standard pick-and-place assembly equipment?

A: Yes. Tape & Reel (TR) packaging is the standard format for surface mount component assembly. The DO-214AA (SMB) package in Tape & Reel format is fully compatible with automated assembly equipment and standard component feeders.

Q: Can I mix inventory of both part numbers in the same production batch?

A: Yes. Both parts are electrically and mechanically equivalent and can be used interchangeably in the same circuit design and assembly process. However, standard manufacturing practice typically maintains single part number traceability per production lot for quality and traceability documentation.