SMBJ170AHM3_A/I Equivalent & Substitute Parts

Part Overview

The SMBJ170AHM3_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 listed as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and procurement.

Substiute Parts

SMBJ170AHM3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1114SMBJ170AHM3_A/I Datasheet

Current PartRFQ

SMBJ170AHM3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 882SMBJ170AHM3_B/I Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SMBJ170AHM3_A/I is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff: 170V (±tolerance)
• Voltage - Breakdown (Min): 189V
• Voltage - Clamping (Max) @ Ipp: 275V
• Current - Peak Pulse (10/1000µs): 2.2A
• 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 SMBJ170AHM3_B/I meets all these criteria and is classified as the manufacturer-recommended substitute. The primary distinction is product status: the original part is obsolete, while the substitute is active in production.

Parameter Comparison

Engineering Selection Recommendations

The SMBJ170AHM3_B/I is the direct substitute for the obsolete SMBJ170AHM3_A/I. Both parts are manufactured by Vishay and share identical electrical specifications, thermal performance, and automotive-grade qualifications. The substitute maintains full AEC-Q101 compliance and ROHS3 compliance, ensuring compatibility with automotive and telecom applications.

The primary advantage of selecting the SMBJ170AHM3_B/I is active production status and ongoing availability. The packaging difference (Tape & Reel for the substitute versus unspecified for the original) does not affect electrical or mechanical compatibility in surface mount applications.

Frequently Asked Questions (FAQ)

Q: Can the SMBJ170AHM3_B/I be used as a direct replacement for the SMBJ170AHM3_A/I?

A: Yes. Both parts are identical in electrical performance, thermal characteristics, package type (DO-214AA, SMB), and automotive qualifications. The substitute is the manufacturer-recommended replacement for the obsolete original part.

Q: Are there any differences in the DO-214AA package between these parts?

A: No. Both parts use the same DO-214AA (SMB) surface mount package with identical mechanical dimensions and pin configurations.

Q: Does the SMBJ170AHM3_B/I meet automotive standards?

A: Yes. The substitute maintains Automotive Grade classification and AEC-Q101 qualification, identical to the original part.

Q: What is the significance of the packaging designation change to Tape & Reel (TR)?

A: Tape & Reel packaging is a standard supply format for surface mount components and does not affect electrical or mechanical compatibility. It indicates the component is supplied in continuous tape format suitable for automated assembly processes.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both the SMBJ170AHM3_A/I and SMBJ170AHM3_B/I are ROHS3 Compliant and REACH Unaffected.