Equivalent & Substitute Parts for SMBJ51AHM3_A/I

Part Overview

The SMBJ51AHM3_A/I from Vishay General Semiconductor - Diodes Division is a Transient Voltage Suppressor (TVS) diode in the TransZorb® series. It features a 51V reverse standoff voltage, an 82.4V clamping voltage, and a peak pulse current of 7.3A, with a peak pulse power rating of 600W. This device is surface-mounted in the DO-214AA (SMB) package and is designed for telecom applications with AEC-Q101 automotive qualification. The part is now obsolete, making it necessary to identify alternative models for ongoing production and maintenance requirements.

Substiute Parts

SMBJ51AHM3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 927SMBJ51AHM3_A/I Datasheet

Current PartRFQ

SMBJ51AHM3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 811SMBJ51AHM3_B/I Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts are determined based on strict matching of all key electrical and mechanical parameters as provided. The following parameters must be identical for interchangeable use: series, type, voltage ratings, peak pulse current, peak pulse power, package/case, mounting type, automotive grade, qualification, and compliance statuses. Only parts explicitly listed as substitutes with matching specifications are included.

Parameter Comparison

Engineering Selection Recommendations

The primary selection criterion is the part status. SMBJ51AHM3_A/I is obsolete, while SMBJ51AHM3_B/I is active. Both devices are AEC-Q101 qualified, are automotive grade, and fully comply with ROHS3 and REACH requirements. The electrical and mechanical parameters are identical. Substitute only with the parts listed that meet all compliance and certification criteria provided.

Frequently Asked Questions (FAQ)

Q1: What critical parameters must align when selecting a substitute for SMBJ51AHM3_A/I?
A1: Substitution requires identical values for voltage ratings, clamping voltage, peak pulse current, peak pulse power, number of channels, type, mechanical package, mounting type, automotive grade, compliance status, and qualification standard.

Q2: Is SMBJ51AHM3_B/I a direct drop-in replacement for SMBJ51AHM3_A/I?
A2: Yes. All relevant electrical, mechanical, grading, qualification, and compliance parameters provided are the same.

Q3: Are there any packaging or mounting differences to consider?
A3: No. Both devices use the DO-214AA (SMB) package and are surface-mount type, as specified.

Q4: Do compliance and certification statuses change with the substitute?
A4: No. Both parts are ROHS3 Compliant, REACH Unaffected, and AEC-Q101 qualified.

Q5: Why is it necessary to find a substitute for SMBJ51AHM3_A/I?
A5: The main part is obsolete, and ongoing applications require an active replacement matching all specified key parameters.