SMBJ12AHM3_A/I Equivalent & Substitute Parts

Part Overview

The SMBJ12AHM3_A/I is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by 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 classified as obsolete, necessitating identification of active equivalent alternatives to maintain design continuity and ensure supply chain availability.

Substiute Parts

SMBJ12AHM3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1014SMBJ12AHM3_A/I Datasheet

Current PartRFQ

SMBJ12AHM3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 783SMBJ12AHM3_B/I Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMBJ12AHM3_A/I is determined by strict equivalence across the following critical electrical and mechanical 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
• Unidirectional Channels: 1
• Package / Case: DO-214AA, SMB
• Mounting Type: Surface Mount
• Operating Temperature Range: -55°C ~ 150°C (TJ)
• Grade: Automotive
• Qualification: AEC-Q101

The SMBJ12AHM3_B/I is identified as the manufacturer-recommended substitute. This part maintains identical electrical specifications and physical packaging while transitioning from obsolete to active product status. The substitution is based on complete parameter alignment across all critical performance and compliance criteria.

Parameter Comparison

Engineering Selection Recommendations

The SMBJ12AHM3_B/I is the direct equivalent for the obsolete SMBJ12AHM3_A/I. Both parts are manufactured by Vishay and carry identical electrical performance specifications, automotive-grade qualification (AEC-Q101), and ROHS3 compliance. The primary distinction is product status: the SMBJ12AHM3_A/I is obsolete, while the SMBJ12AHM3_B/I maintains active production status. For new designs or component replenishment, the SMBJ12AHM3_B/I is the appropriate selection to ensure long-term supply chain continuity and compliance with current manufacturing standards.

Frequently Asked Questions (FAQ)

Q: Can the SMBJ12AHM3_B/I be used as a direct replacement for the SMBJ12AHM3_A/I?

A: Yes. Both parts are electrically and mechanically identical, with matching voltage ratings (12V reverse standoff, 19.9V clamping), current specifications (30.2A peak pulse), power dissipation (600W), package type (DO-214AA SMB), and operating temperature range (-55°C to 150°C). Both maintain automotive-grade qualification and AEC-Q101 certification.

Q: What is the difference between SMBJ12AHM3_A/I and SMBJ12AHM3_B/I?

A: The primary difference is product status. The SMBJ12AHM3_A/I is classified as obsolete, while the SMBJ12AHM3_B/I is active. The SMBJ12AHM3_B/I is also available in Tape & Reel (TR) packaging format. All electrical and mechanical parameters remain identical.

Q: Are there any compatibility concerns when substituting these parts?

A: No compatibility concerns exist. The parts share identical pinout, package dimensions (DO-214AA SMB), mounting type (surface mount), and electrical characteristics. PCB layout and assembly processes require no modification.

Q: Why is the SMBJ12AHM3_A/I obsolete?

A: Product obsolescence is determined by the manufacturer. The SMBJ12AHM3_B/I represents the current active equivalent and should be used for all new applications and component replenishment.

Q: What certifications do these parts carry?

A: Both parts are AEC-Q101 qualified for automotive applications, ROHS3 compliant, and REACH unaffected. Both maintain the same operating temperature specification of -55°C to 150°C (junction temperature).