Equivalent & Substitute Parts Reference: SMBJ5944A/TR13

Part Overview

The Microchip Technology SMBJ5944A/TR13 is a Zener Diode, specified for 62 V nominal Zener voltage, 2 W power dissipation, and ±10% tolerance, with a surface mount design in the DO-214AA (SMB) package. Product status is “Active,” with inventory available. In engineering applications, identifying equivalent or substitute Zener diodes is essential when specific product variants are unavailable, compliance requirements change, or increased inventory flexibility is required. All suitable substitutes must match the core electrical and mechanical parameters to ensure correct operation and package compatibility.

Substiute Parts

SMBJ5944A/TR13

Microchip TechnologyIn Stock: 933SMBJ5944A/TR13 Datasheet

Current PartRFQ

1SMB5944BT3G

onsemiIn Stock: 152421SMB5944BT3G Datasheet

SimilarRFQ

SZ1SMB5944BT3G

onsemiIn Stock: 20166SZ1SMB5944BT3G Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute part selection for Zener diodes in the DO-214AA (SMB) category requires strict alignment of the following key parameters: nominal Zener voltage, Zener tolerance, maximum power rating, impedance, reverse leakage current, forward voltage, operating temperature, mounting type, and mechanical package. Substitutes are grouped when they match these criteria, ensuring electrical operation and form factor compatibility.

Parameter Comparison

Engineering Selection Recommendations

For applications requiring RoHS or REACH compliance, 1SMB5944BT3G and SZ1SMB5944BT3G provide alternatives with active status and matching electrical/mechanical ratings. The original SMBJ5944A/TR13 is RoHS non-compliant, while both substitutes are listed as ROHS3 Compliant and REACH Unaffected. All listed parts support unlimited MSL and possess identical mounting and package specifications.

Frequently Asked Questions (FAQ)

Q1: Which parameters are mandatory when selecting Zener diode substitutes in the DO-214AA, SMB category?
A1: Substitute selection must match nominal Zener voltage, tolerance, maximum power, impedance, reverse leakage current, forward voltage, operating temperature range, mounting type, and package/case.

Q2: Can substitute Zener diodes of higher power rating be used in place of the original?
A2: Yes, provided all other critical parameters align, a higher power rating is acceptable within the same package.

Q3: Do tolerance differences affect substitution options?
A3: Tolerance can influence device selection if circuit requirements are strict. Substitutes listed here have tighter tolerances (±5%) compared to the main part (±10%).

Q4: Are substitute parts compatible with automated surface mount processes?
A4: All compared parts utilize the DO-214AA, SMB standard package for surface mount applications and share the same Moisture Sensitivity Level (MSL).

Q5: How does RoHS or REACH status impact engineering selection?
A5: Substitutes 1SMB5944BT3G and SZ1SMB5944BT3G are ROHS3 Compliant and REACH Unaffected, suitable for projects requiring compliance.