SMBJ17CAHM3_A/I Equivalent & Substitute Parts

Part Overview

The SMBJ17CAHM3_A/I is a bidirectional transient voltage suppressor (TVS) diode from Vishay General Semiconductor - Diodes Division, designed for telecom applications. This surface mount component in DO-214AA (SMB) package provides 17V reverse standoff voltage with 27.6V maximum clamping voltage and 21.7A peak pulse current capability. The part is classified as obsolete, necessitating identification of active equivalent alternatives to maintain design continuity and ensure supply chain availability.

Substiute Parts

SMBJ17CAHM3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1094SMBJ17CAHM3_A/I Datasheet

Current PartRFQ

SMBJ17CAHM3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 985SMBJ17CAHM3_B/I Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SMBJ17CAHM3_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
• Bidirectional Channels: 1
• Package / Case: DO-214AA, SMB
• Type: Zener
• Operating Temperature Range: -55°C ~ 150°C (TJ)
• Grade: Automotive
• Qualification: AEC-Q101

The SMBJ17CAHM3_B/I meets all electrical and mechanical specifications identical to the main part, with the primary distinction being active product status and packaging format (Tape & Reel).

Parameter Comparison

Engineering Selection Recommendations

The SMBJ17CAHM3_B/I is the direct functional equivalent to the obsolete SMBJ17CAHM3_A/I. Both parts maintain identical electrical performance specifications, automotive-grade qualification (AEC-Q101), and regulatory compliance (ROHS3, REACH Unaffected). The substitute part carries active product status, ensuring continued availability and manufacturing support. The packaging difference (Tape & Reel versus bulk) does not affect electrical or mechanical compatibility and is a standard supply chain variation. Selection of the SMBJ17CAHM3_B/I eliminates obsolescence risk while preserving all design requirements for telecom transient voltage suppression applications.

Frequently Asked Questions (FAQ)

Q: Are the SMBJ17CAHM3_A/I and SMBJ17CAHM3_B/I electrically identical?

A: Yes. Both parts share identical voltage ratings (17V reverse standoff, 27.6V clamping), current specifications (21.7A peak pulse), power dissipation (600W), temperature range (-55°C to 150°C), and automotive qualification (AEC-Q101).

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

A: The primary difference is product status and packaging format. The SMBJ17CAHM3_A/I is obsolete and supplied in bulk packaging, while the SMBJ17CAHM3_B/I is active and supplied in Tape & Reel format. Electrical and mechanical specifications are identical.

Q: Can I use SMBJ17CAHM3_B/I as a direct replacement in existing designs?

A: Yes. The SMBJ17CAHM3_B/I is a direct pin-for-pin and functionally equivalent replacement. No design modifications are required. The DO-214AA (SMB) package footprint is identical.

Q: Does the Tape & Reel packaging affect circuit performance?

A: No. Tape & Reel is a supply and handling format only. It does not affect the electrical characteristics, reliability, or performance of the component once soldered into the circuit.

Q: Are both parts automotive-grade qualified?

A: Yes. Both the SMBJ17CAHM3_A/I and SMBJ17CAHM3_B/I carry automotive-grade classification and AEC-Q101 qualification, meeting automotive reliability and quality standards.

Q: What is the reason for the obsolescence of SMBJ17CAHM3_A/I?

A: The SMBJ17CAHM3_A/I is listed as obsolete by the manufacturer. The SMBJ17CAHM3_B/I represents the active continuation of this product line with identical specifications.