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Equivalent & Substitute Parts Reference for SMBJ4742A/TR13
Part Overview
SMBJ4742A/TR13 is a surface mount Zener diode by Microchip Technology in the Diodes, Zener category, provided in Tape & Reel packaging. The device offers a nominal Zener voltage of 12 V, maximum power of 2 W, and a ±5% voltage tolerance in a DO-214AA, SMBJ form factor. As an active part with significant inventory, substitutes are referenced for cases involving RoHS compliance requirements or alternative supply sources. Finding alternatives is necessary when environmental certifications or alternative manufacturer preferences or supply continuity are required while maintaining electrical and mechanical compatibility.
Substiute Parts
Key Parameters
| Manufacturer Part Number | Manufacturer | Category | Packaging | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| SMBJ4742A/TR13 | Microchip Technology | Diodes, Zener | Tape & Reel (TR) | 12 V | ±5% | 2 W | 9 Ohms | 5 µA @ 9.1 V | 1.2 V @ 200 mA | -65°C ~ 150°C | Surface Mount | DO-214AA, SMB | SMBJJ (DO-214AA) | RoHS non-compliant | 1 (Unlimited) | REACH Unaffected | Active |
Substitute Part Grouping Explanation
Substitute parts for SMBJ4742A/TR13 are determined strictly by comparing the following parameters:
- Zener voltage (12 V)
- Tolerance (±5%)
- Power rating
- Maximum impedance
- Reverse leakage current
- Forward voltage at specified current
- Operating temperature range
- Mounting type
- Package / case (DO-214AA, SMB)
- Supplier device package
- RoHS and REACH status
- Moisture Sensitivity Level (MSL)
- Product status
Only substitute part numbers matching these core electrical and mechanical specifications and packaging attributes are included. This approach ensures plug-in compatibility within defined parameters.
Parameter Comparison
| Parameter | SMBJ4742A/TR13 (Microchip Technology) | 1SMB5927B-13 (Diodes Incorporated) |
|---|---|---|
| Category | Diodes, Zener | Diodes, Zener |
| Voltage - Zener (Nom) (Vz) | 12 V | 12 V |
| Tolerance | ±5% | ±5% |
| Power - Max | 2 W | 550 mW |
| Impedance (Max) (Zzt) | 9 Ohms | 6.5 Ohms |
| Current - Reverse Leakage @ Vr | 5 µA @ 9.1 V | 1 µA @ 9.1 V |
| Voltage - Forward (Vf) (Max) @ If | 1.2 V @ 200 mA | 1.5 V @ 200 mA |
| Operating Temperature | -65°C ~ 150°C | -65°C ~ 150°C |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | DO-214AA, SMB | DO-214AA, SMB |
| Supplier Device Package | SMBJJ (DO-214AA) | SMB |
| RoHS Status | RoHS non-compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) |
| REACH Status | REACH Unaffected | REACH Unaffected |
| Product Status | Active | Active |
Engineering Selection Recommendations
Selection between SMBJ4742A/TR13 and substitute 1SMB5927B-13 may be based on product status and compliance documentation. Main distinction is RoHS status: SMBJ4742A/TR13 is RoHS non-compliant, while 1SMB5927B-13 is ROHS3 compliant. Both parts are active with identical Zener voltage, tolerance, mounting type, and package. Only the substitute maintains ROHS3 compliance. Both components have Moisture Sensitivity Level 1 (Unlimited) and REACH unaffected status.
Frequently Asked Questions (FAQ)
Q: What are the primary criteria for substituting SMBJ4742A/TR13 with 1SMB5927B-13?
A: Substitution is based on matching Zener voltage (12 V), tolerance (±5%), case/package (DO-214AA, SMB), mounting type, and operating temperature range.
Q: Does the difference in RoHS compliance affect substitution?
A: SMBJ4742A/TR13 is RoHS non-compliant. If RoHS compliance is mandatory, only ROHS3 compliant substitutes like 1SMB5927B-13 are selectable.
Q: Are both parts suitable for surface mount applications?
A: Yes, both SMBJ4742A/TR13 and 1SMB5927B-13 support surface mount in DO-214AA, SMB packaging.
Q: Do these substitutes have the same operating temperature range?
A: Yes, both devices specify an operating temperature range of -65°C to +150°C.
Q: Is the power rating identical between the main and substitute part?
A: SMBJ4742A/TR13 supports 2 W. Substitute 1SMB5927B-13 provides 550 mW. Only select substitutes that meet system power dissipation requirements.
Q: Are the Moisture Sensitivity Levels compatible?
A: Both products are rated at Moisture Sensitivity Level 1 (Unlimited), supporting unrestricted mounting and handling in standard manufacturing.
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