Equivalent & Substitute Parts Reference for SMBJ5373A/TR13

Part Overview

The SMBJ5373A/TR13 by Microchip Technology is a surface-mount Zener diode featuring a nominal Zener voltage of 68 V at 5 W power, ±10% tolerance, and maximum 44 Ohm impedance. The device is packaged in DO-214AA (SMBJ) and is optimized for applications requiring robust voltage regulation and protection. The current product status is Active. Designing for long-term manufacturing or compliance needs may require evaluating alternative Zener diodes with closely matched parameters, package, and electrical performance. Substitute models are especially important when original inventory, regulatory requirements, or multisource engineering policies mandate or benefit from alternate part approvals.

Substiute Parts

SMBJ5373A/TR13

Microchip TechnologyIn Stock: 954SMBJ5373A/TR13 Datasheet

Current PartRFQ

1SMB5945BT3G

onsemiIn Stock: 209251SMB5945BT3G Datasheet

SimilarRFQ

SZ1SMB5945BT3G

onsemiIn Stock: 5213SZ1SMB5945BT3G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution is limited strictly to Zener diodes sharing the following parameters: voltage - Zener value, package and dimensions (DO-214AA, SMB), mounting method, operating temperature, and general diode category. Substitute parts must also match or exceed minimum necessary power ratings and comply with declared regulatory and inventory attributes. Only substitute models explicitly provided are considered; no substitutions are made beyond this defined part list. Substitutes listed include 1SMB5945BT3G and SZ1SMB5945BT3G.

The following key parameters are used for determining electrical and mechanical interchangeability:

• Voltage - Zener (Nom) (Vz)
• Tolerance
• Power - Max
• Impedance (Max) (Zzt)
• Current - Reverse Leakage @ Vr
• Voltage - Forward (Vf) (Max) @ If
• Operating Temperature
• Mounting Type
• Package / Case
• Supplier Device Package
• RoHS Status
• Moisture Sensitivity Level (MSL)
• REACH Status
• Product Status

Parameter Comparison

Engineering Selection Recommendations

All listed Zener diode alternatives—SMBJ5373A/TR13, 1SMB5945BT3G, and SZ1SMB5945BT3G—are in active product status and have unlimited moisture sensitivity level (MSL 1). The alternate onsemi substitutes are ROHS3 compliant, while the original Microchip Technology part is RoHS non-compliant. All substitutes are REACH unaffected. Selection may be driven by compliance requirements (RoHS, REACH), inventory, and supplier preference. No further technical or field-specific recommendations are included.

Frequently Asked Questions (FAQ)

Q1: What are the substitution criteria for the SMBJ5373A/TR13 Zener diode?
A1: Substitution is based strictly on matching the Zener voltage, power rating, tolerance, impedance, leakage current, package, mounting method, and regulatory status as provided in the parameters.

Q2: Are the substitute Zener diodes pin-to-pin and form-fit compatible with SMBJ5373A/TR13?
A2: All substitute part numbers provided use the DO-214AA, SMB package and are surface mount devices, supporting physical compatibility.

Q3: Should compliance requirements such as RoHS be considered in selection?
A3: Selection must follow regulatory compliance needs. Some alternate parts (1SMB5945BT3G and SZ1SMB5945BT3G) are ROHS3 Compliant, while SMBJ5373A/TR13 is RoHS non-compliant.

Q4: Do the listed substitutes differ in electrical parameters from the main part?
A4: Substitutes may have different power ratings, tolerances, impedances, and leakage currents as given in the parameter table. Only parameters provided are considered; no additional values are evaluated.

Q5: Can SZ1SMB5945BT3G be used in automotive applications?
A5: SZ1SMB5945BT3G declares automotive grade and AEC-Q101 qualification in the provided parameters.

Q6: Is there any difference in the moisture sensitivity level (MSL) among the available options?
A6: All options specify MSL 1 (unlimited), indicating no difference in moisture sensitivity handling.