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SMBJ12C-E3/5B Equivalent & Substitute Parts
Part Overview
The SMBJ12C-E3/5B is a 12V Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division in DO-214AA (SMB) surface mount package. This bidirectional Zener diode is designed for general-purpose transient voltage suppression applications with a 22V maximum clamping voltage and 27.3A peak pulse current capability.
The SMBJ12C-E3/5B is classified as obsolete. Equivalent and substitute parts are available from multiple manufacturers with active product status, offering improved availability and supply chain continuity while maintaining electrical and mechanical compatibility.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Reverse Standoff (Typ) | 12 | V |
| Voltage - Breakdown (Min) | 13.3 | V |
| Voltage - Clamping (Max) @ Ipp | 22 | V |
| Current - Peak Pulse (10/1000µs) | 27.3 | A |
| Power - Peak Pulse | 600 | W |
| Operating Temperature Range | -55 to 150 | °C (TJ) |
| Package / Case | DO-214AA, SMB | - |
| Mounting Type | Surface Mount | - |
| RoHS Status | ROHS3 Compliant | - |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | - |
Substitute Part Grouping Explanation
Substitution eligibility for SMBJ12C-E3/5B is determined by the following critical parameters:
- Voltage - Reverse Standoff (Typ): 12V
- Voltage - Breakdown (Min): 13.3V
- Voltage - Clamping (Max) @ Ipp: 22V
- Current - Peak Pulse (10/1000µs): 27.3A
- Power - Peak Pulse: 600W
- Package / Case: DO-214AA, SMB
- Mounting Type: Surface Mount
- RoHS Status: ROHS3 Compliant
- Moisture Sensitivity Level (MSL): 1 (Unlimited)
Substitute parts are grouped into two categories based on clamping voltage specification:
Category A - Exact Clamping Voltage Match (22V): Parts with identical 22V clamping voltage and 27.3A peak pulse current. These provide direct electrical equivalence.
Category B - Alternative Clamping Voltage (19.9V): Parts with 19.9V clamping voltage and 30.2A peak pulse current. These maintain the same reverse standoff voltage and breakdown voltage but offer different transient suppression characteristics. Selection depends on circuit-specific clamping voltage requirements.
All substitute parts maintain DO-214AA (SMB) package compatibility, surface mount configuration, ROHS3 compliance, and MSL 1 rating.
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Voltage - Clamping (Max) @ Ipp | Current - Peak Pulse (10/1000µs) | Operating Temperature Range | Product Status | Packaging |
|---|---|---|---|---|---|---|
| SMBJ12C-E3/5B | Vishay General Semiconductor - Diodes Division | 22V | 27.3A | -55 to 150°C | Obsolete | - |
| SMBJ12CE3/TR13 | Microchip Technology | 22V | 27.3A | -65 to 150°C | Active | Tape & Reel (TR) |
| SMBJ12CA-E3/5B | Vishay General Semiconductor - Diodes Division | 19.9V | 30.2A | -55 to 150°C | Active | Tape & Reel (TR) |
| SMBJ12CA | EVVO Semi | 19.9V | 30.2A | -65 to 150°C | Active | Cut Tape (CT) & Digi-Reel® |
| SMBJ12CA-13-F | Diodes Incorporated | 19.9V | 30.2A | -55 to 150°C | Active | Tape & Reel (TR) |
| SMBJ12CA-HR | Littelfuse | 19.9V | 30.2A | -65 to 150°C | Active | Tape & Reel (TR) |
| SMBJ12CA-HRA | Littelfuse Inc. | 19.9V | 30.2A | -65 to 150°C | Active | Tape & Reel (TR) |
| SMBJ12CA-TR | STMicroelectronics | 19.9V | 31A | -55 to 150°C | Active | Cut Tape (CT) & Digi-Reel® |
| SMBJ12CAE3/TR13 | Microchip Technology | 19.9V | 30.2A | -65 to 150°C | Active | Tape & Reel (TR) |
Engineering Selection Recommendations
Primary Recommendation - Exact Electrical Match:
SMBJ12CE3/TR13 (Microchip Technology) is the preferred substitute for direct replacement. This part maintains the 22V clamping voltage and 27.3A peak pulse current specifications of the original SMBJ12C-E3/5B. Extended operating temperature range (-65 to 150°C) provides additional thermal margin. Active product status ensures long-term availability and supply chain stability.
Alternative Selection - Enhanced Current Capability:
SMBJ12CA-E3/5B (Vishay General Semiconductor - Diodes Division) offers active product status from the original manufacturer. The 19.9V clamping voltage and 30.2A peak pulse current provide enhanced transient suppression capability. This option is suitable for applications where slightly lower clamping voltage and higher peak current capacity are acceptable.
Multi-Source Alternatives:
SMBJ12CA (EVVO Semi), SMBJ12CA-13-F (Diodes Incorporated), SMBJ12CA-HR (Littelfuse), SMBJ12CA-HRA (Littelfuse Inc.), and SMBJ12CAE3/TR13 (Microchip Technology) all provide active product status with 19.9V clamping voltage and 30.2A peak pulse current. These options support supply chain diversification while maintaining electrical compatibility within the specified parameter range.
All recommended substitutes maintain ROHS3 compliance, MSL 1 rating, DO-214AA (SMB) package configuration, and surface mount mounting type.
Frequently Asked Questions (FAQ)
Q: Can SMBJ12CA series parts (19.9V clamping) directly replace SMBJ12C-E3/5B (22V clamping)?
A: SMBJ12CA series parts are electrically compatible substitutes with different transient suppression characteristics. The 19.9V clamping voltage is lower than the original 22V specification. Selection depends on circuit requirements. If the application requires exactly 22V clamping, use SMBJ12CE3/TR13. If 19.9V clamping is acceptable, SMBJ12CA variants provide enhanced current capability (30.2A vs 27.3A).
Q: Are all substitute parts in the same DO-214AA (SMB) package?
A: Yes. All substitute parts listed maintain DO-214AA (SMB) surface mount package compatibility. Mechanical and electrical footprint compatibility is preserved across all options.
Q: What is the difference between SMBJ12CA variants from different manufacturers?
A: All SMBJ12CA variants (EVVO Semi, Diodes Incorporated, Littelfuse, STMicroelectronics, Microchip Technology) maintain identical electrical specifications: 12V reverse standoff, 13.3V minimum breakdown, 19.9V clamping, and 30.2A peak pulse current. Differences exist in packaging format (Tape & Reel vs Cut Tape & Digi-Reel), operating temperature range (-55 to 150°C vs -65 to 150°C), and availability. Selection can be based on supply chain preference and packaging requirements.
Q: Is ROHS3 compliance maintained across all substitutes?
A: Yes. All substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, matching the original SMBJ12C-E3/5B specifications.
Q: Why is SMBJ12C-E3/5B classified as obsolete?
A: The original part is no longer in active production. Equivalent and substitute parts from multiple manufacturers provide superior availability and supply chain continuity while maintaining or exceeding electrical performance specifications.
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