SMBJ17AHM3_A/I Equivalent & Substitute Parts

Part Overview

The SMBJ17AHM3_A/I is a unidirectional Transient Voltage Suppressor (TVS) diode from Vishay General Semiconductor - Diodes Division, part of the TransZorb® series. This surface mount component is designed for telecom applications requiring transient voltage protection. The part is currently classified as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and procurement.

Substiute Parts

SMBJ17AHM3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1128SMBJ17AHM3_A/I Datasheet

Current PartRFQ

SMBJ17AHM3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 951SMBJ17AHM3_B/I Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SMBJ17AHM3_A/I is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff (Typ): 17V
• Voltage - Breakdown (Min): 18.9V
• Voltage - Clamping (Max) @ Ipp: 27.6V
• Current - Peak Pulse (10/1000µs): 21.7A
• Power - Peak Pulse: 600W
• Package / Case: DO-214AA, SMB
• Mounting Type: Surface Mount
• Operating Temperature Range: -55°C ~ 150°C (TJ)
• Automotive Grade and AEC-Q101 Qualification

The SMBJ17AHM3_B/I meets all these criteria and is classified as an active product from the same manufacturer and series, making it a direct functional equivalent.

Parameter Comparison

Engineering Selection Recommendations

The SMBJ17AHM3_B/I is the direct substitute for the obsolete SMBJ17AHM3_A/I. Both parts are manufactured by Vishay and share identical electrical and mechanical specifications. The primary distinction is product status: the SMBJ17AHM3_B/I is actively produced and supported, while the SMBJ17AHM3_A/I is obsolete.

Both parts maintain automotive-grade qualification (AEC-Q101) and ROHS3 compliance, ensuring compatibility with automotive and industrial applications. The packaging format (DO-214AA, SMB) and mounting type (surface mount) are identical, allowing direct PCB layout compatibility without redesign.

Frequently Asked Questions (FAQ)

Q: Can SMBJ17AHM3_B/I be used as a direct replacement for SMBJ17AHM3_A/I?

A: Yes. Both parts are electrically and mechanically identical. The SMBJ17AHM3_B/I differs only in packaging format (Tape & Reel vs. bulk) and active product status. No circuit modifications or PCB layout changes are required.

Q: What is the difference between the packaging designations?

A: SMBJ17AHM3_A/I is supplied in bulk packaging, while SMBJ17AHM3_B/I is supplied in Tape & Reel (TR) format. Both use the same DO-214AA (SMB) component package. Tape & Reel packaging is standard for automated assembly processes.

Q: Are both parts qualified for automotive applications?

A: Yes. Both the SMBJ17AHM3_A/I and SMBJ17AHM3_B/I carry automotive-grade classification and AEC-Q101 qualification, meeting automotive industry reliability and quality standards.

Q: Why is the original part marked as obsolete?

A: Product obsolescence typically reflects manufacturing discontinuation. The SMBJ17AHM3_B/I remains in active production and provides identical performance, making it the recommended choice for new designs and ongoing procurement.