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Equivalent & Substitute Parts for Microchip SMBJ5940C/TR13 Zener Diode
Part Overview
Microchip Technology SMBJ5940C/TR13 is a Zener diode designed for voltage regulation applications requiring 43 V nominal Zener voltage and 2 W power dissipation in a surface mount DO-214AA (SMBJ) package. The part is currently active and available in tape & reel packaging. Situations such as supply constraints, compliance requirements, or special certifications can necessitate identifying equivalent or substitute Zener diodes with matching electrical and mechanical parameters.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | SMBJ5940C/TR13 |
| Category | Diodes, Zener |
| Voltage - Zener (Nom) (Vz) | 43 V |
| Tolerance | ±2% |
| Power - Max | 2 W |
| Impedance (Max) (Zzt) | 53 Ohms |
| Current - Reverse Leakage @ Vr | 1 µA @ 32.7 V |
| Voltage - Forward (Vf) (Max) @ If | 1.2 V @ 200 mA |
| Operating Temperature | -65°C ~ 150°C |
| Mounting Type | Surface Mount |
| Package / Case | DO-214AA, SMB |
| Supplier Device Package | SMBJ (DO-214AA) |
| RoHS Status | RoHS non-compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| REACH Status | REACH Unaffected |
| ECCN | EAR99 |
| HTSUS | 8541.10.0050 |
Substitute Part Grouping Explanation
Substitute parts for the Microchip SMBJ5940C/TR13 are determined based on matching key electrical and mechanical parameters including: Zener voltage (Vz), power rating, impedance (Zzt), reverse leakage current, forward voltage, operating temperature range, mounting type, and package/case. Category and packaging must also align with the main part to ensure direct equivalence. Additional consideration is given to compliance (RoHS, REACH), MSL rating, and applicable certifications.
Parameter Comparison
| Parameter | SMBJ5940C/TR13 (Microchip) |
1SMB5940BT3G (onsemi) |
SZ1SMB5940BT3G (onsemi) |
|---|---|---|---|
| Category | Diodes, Zener | Diodes, Zener | Diodes, Zener |
| Voltage - Zener (Nom) (Vz) | 43 V | 43 V | 43 V |
| Tolerance | ±2% | ±5% | ±5% |
| Power - Max | 2 W | 3 W | 3 W |
| Impedance (Max) (Zzt) | 53 Ohms | 53 Ohms | 53 Ohms |
| Current - Reverse Leakage @ Vr | 1 µA @ 32.7 V | 1 µA @ 32.7 V | 1 µA @ 32.7 V |
| Voltage - Forward (Vf) (Max) @ If | 1.2 V @ 200 mA | 1.5 V @ 200 mA | 1.5 V @ 200 mA |
| Operating Temperature | -65°C ~ 150°C | -65°C ~ 150°C | -65°C ~ 150°C |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount |
| Package / Case | DO-214AA, SMB | DO-214AA, SMB | DO-214AA, SMB |
| Supplier Device Package | SMBJ (DO-214AA) | SMB | SMB |
| RoHS Status | RoHS non-compliant | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
| REACH Status | REACH Unaffected | REACH Unaffected | REACH Unaffected |
| ECCN | EAR99 | EAR99 | EAR99 |
| HTSUS | 8541.10.0050 | 8541.10.0050 | 8541.10.0050 |
Engineering Selection Recommendations
1SMB5940BT3G and SZ1SMB5940BT3G are active diodes in the same category and package/case as SMBJ5940C/TR13, with matching Zener voltage and impedance characteristics. Both substitutes provide higher power ratings and meet comparable operating temperature ranges. RoHS compliance should be considered if lead-free or compliant devices are required, as SMBJ5940C/TR13 is RoHS non-compliant while the onsemi alternatives are ROHS3 Compliant. SZ1SMB5940BT3G offers AEC-Q101 automotive qualification applicable for automotive-grade requirements. All listed parts share the same MSL, REACH, ECCN, and HTS classifications.
Frequently Asked Questions (FAQ)
Q: What are the key electrical parameters required for direct substitution of a Zener diode in this category?
A: Substitution requires matching Zener voltage (Vz), impedance (Zzt), reverse leakage current, forward voltage, power rating, operating temperature range, mounting type, and package/case.
Q: Is package compatibility ensured between SMBJ5940C/TR13 and the substitute parts?
A: All substitute parts share the DO-214AA, SMB package with surface mount suitability.
Q: Do tolerance and power differences affect selection?
A: Substitute parts have ±5% tolerance and higher power rating (3 W) compared to SMBJ5940C/TR13's ±2% tolerance and 2 W rating. Evaluate specifically in applications sensitive to voltage precision or power dissipation.
Q: Are there any compliance differences?
A: SMBJ5940C/TR13 is RoHS non-compliant; both substitutes are ROHS3 Compliant and REACH unaffected.
Q: Which substitute is suitable for automotive applications?
A: SZ1SMB5940BT3G includes AEC-Q101 qualification and automotive grade designation.
Q: Are mounting and moisture sensitivity levels compatible?
A: All listed parts are surface mount with MSL1 rating (unlimited).
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