SMBJ12CAHM3_A/I Equivalent & Substitute Parts

Part Overview

The SMBJ12CAHM3_A/I is a bidirectional transient voltage suppressor (TVS) diode from Vishay General Semiconductor - Diodes Division, designed for telecom applications. This component features a 12V reverse standoff voltage with a 19.9V maximum clamping voltage and 30.2A peak pulse current capability in a surface mount DO-214AA (SMB) package. The part is currently listed as obsolete, making identification of active equivalent parts essential for ongoing design support and procurement.

Substiute Parts

SMBJ12CAHM3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1214SMBJ12CAHM3_A/I Datasheet

Current PartRFQ

SMBJ12CAHM3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 666SMBJ12CAHM3_B/I Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The SMBJ12CAHM3_A/I can be substituted with SMBJ12CAHM3_B/I based on strict electrical and mechanical parameter equivalence. Both parts share identical core specifications that define TVS diode functionality and compatibility:

Critical Substitution Parameters:

• Voltage - Reverse Standoff (Typ): 12V
• Voltage - Breakdown (Min): 13.3V
• Voltage - Clamping (Max) @ Ipp: 19.9V
• Current - Peak Pulse (10/1000µs): 30.2A
• Power - Peak Pulse: 600W
• Package / Case: DO-214AA, SMB
• Bidirectional Channels: 1
• Operating Temperature: -55°C ~ 150°C (TJ)
• Grade: Automotive
• Qualification: AEC-Q101

The primary distinction between these parts is product status and packaging format. The substitute part (SMBJ12CAHM3_B/I) is active and available in Tape & Reel packaging, whereas the original part is obsolete.

Parameter Comparison

Engineering Selection Recommendations

The SMBJ12CAHM3_B/I is the direct active equivalent for the obsolete SMBJ12CAHM3_A/I. Both parts maintain identical electrical performance specifications and automotive-grade qualifications (AEC-Q101). The substitute part is currently in active production status with confirmed inventory availability.

Selection of SMBJ12CAHM3_B/I is supported by:

• Identical voltage and current ratings across all critical parameters
• Matching automotive grade and AEC-Q101 qualification
• Equivalent operating temperature range (-55°C ~ 150°C)
• Identical package form factor (DO-214AA, SMB)
• Full RoHS3 compliance and REACH compliance status
• Active product status ensuring long-term availability

Frequently Asked Questions (FAQ)

Q: Can SMBJ12CAHM3_B/I be used as a direct replacement for SMBJ12CAHM3_A/I?

A: Yes. Both parts are electrically and mechanically identical. They share the same voltage ratings (12V reverse standoff, 19.9V clamping), current handling (30.2A peak pulse), power dissipation (600W), package type (DO-214AA, SMB), and automotive qualifications (AEC-Q101). The substitute is the active production equivalent.

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

A: The primary difference is product status. SMBJ12CAHM3_A/I is obsolete, while SMBJ12CAHM3_B/I is active. The substitute part is supplied in Tape & Reel packaging format. All electrical and mechanical specifications remain identical.

Q: Are there any compliance or certification differences?

A: No. Both parts maintain identical compliance status: ROHS3 compliant, REACH unaffected, and AEC-Q101 automotive qualification. Operating temperature ranges are identical at -55°C ~ 150°C (TJ).

Q: Is the DO-214AA (SMB) package compatible with existing PCB designs?

A: Yes. Both parts use the identical DO-214AA (SMB) surface mount package, ensuring direct compatibility with existing PCB layouts and assembly processes.

Q: What is the moisture sensitivity level for these parts?

A: The SMBJ12CAHM3_A/I has an MSL rating of 1 (Unlimited). This indicates minimal moisture sensitivity and no special storage or handling requirements.