Equivalent & Substitute Parts for Microchip Technology SMBJ4757A/TR13

Part Overview

The Microchip Technology SMBJ4757A/TR13 is a surface mount Zener diode rated for 51 V nominal Zener voltage and 2 W maximum power dissipation in the DO-214AA (SMBJ) package. This active product fulfills circuit protection and voltage regulation roles in electronic designs. Engineers may need to identify alternative parts for reasons including RoHS compliance, increased power requirements, inventory sufficiency, or specific application certifications.

Substiute Parts

SMBJ4757A/TR13

Microchip TechnologyIn Stock: 1054SMBJ4757A/TR13 Datasheet

Current PartRFQ

SZ1SMB5942BT3G

onsemiIn Stock: 3085SZ1SMB5942BT3G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Alternative part selection for Zener diodes in the DO-214AA, SMB package is determined by matching critical electrical and mechanical characteristics. Substitute candidates must offer:

• Identical Zener voltage (51 V nominal)
• Comparable or better tolerance (±5%)
• Equal or improved power dissipation (≥ 2 W)
• Compatible package: DO-214AA, SMB with surface mount capability
• Equivalent impedance, leakage, and forward voltage characteristics within stated maximums
• Overlapping or matching operating temperature range
• Product status as Active
• Compliance with application requirements: RoHS, REACH, and automotive grade if needed

All candidate parts listed are derived from explicit substitutions based on the above parameters.

Parameter Comparison

Engineering Selection Recommendations

Both SMBJ4757A/TR13 and SZ1SMB5942BT3G are available as active products in standard DO-214AA, SMB surface mount packaging. SZ1SMB5942BT3G meets or exceeds the electrical ratings and compatibility parameters specified for SMBJ4757A/TR13, and additionally provides ROHS3 compliance and automotive qualification (AEC-Q101). Engineering selection between these parts should be based on required compliance standards and qualification needs specific to the application.

Frequently Asked Questions (FAQ)

Q1: What are the main criteria for selecting a substitute Zener diode in the DO-214AA, SMB package?
A1: Substitute selection should be based on matching Zener voltage, tolerance, power rating, package type, mounting method, operating temperature range, and product status.

Q2: Is it necessary to match the package and mounting method exactly?
A2: Yes, for form and fit compatibility, the substitute must use the DO-214AA, SMB package and surface mount type.

Q3: How does RoHS status affect substitution?
A3: If the application requires RoHS compliance, a non-compliant part must be replaced with a compliant substitute.

Q4: Are all listed substitutes immediately compatible?
A4: All substitutes in this page satisfy the key electrical, mechanical, and compliance parameters based on the provided data.

Q5: What certifications should be compared during selection?
A5: Certifications such as RoHS, REACH, and qualification standards (e.g., AEC-Q101 for automotive) should be reviewed and matched to application requirements.

Q6: If more power dissipation is required, can SZ1SMB5942BT3G be selected over SMBJ4757A/TR13?
A6: SZ1SMB5942BT3G offers a higher maximum power rating (3 W vs. 2 W) and can be used within permitted operating conditions as per the provided specifications.