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SMBJ12C-E3/52 Equivalent & Substitute Parts
Part Overview
The SMBJ12C-E3/52 is a transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, designed for general-purpose overvoltage protection in surface-mount applications. This part operates with a 12V reverse standoff voltage and provides 22V maximum clamping voltage at peak pulse current of 27.3A. The SMBJ12C-E3/52 is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. Substitute parts maintain the same electrical performance envelope while offering active product status and improved availability.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| 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 |
| Operating Temperature Range | -55°C ~ 150°C (TJ) |
| Type | Zener |
| Bidirectional Channels | 1 |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitute parts for the SMBJ12C-E3/52 are selected based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:
- Voltage - Reverse Standoff: 12V (exact match required)
- Voltage - Breakdown (Min): 13.3V (exact match required)
- Package / Case: DO-214AA, SMB (exact match required)
- Mounting Type: Surface Mount (exact match required)
- Type: Zener, Bidirectional (exact match required)
- RoHS Status: ROHS3 Compliant (compliance requirement)
- Moisture Sensitivity Level: 1 (Unlimited) (exact match required)
Substitute parts are grouped into two electrical performance categories based on clamping voltage and peak pulse current specifications:
Category A - Matched Clamping Voltage (22V): Parts with identical 22V maximum clamping voltage and 27.3A peak pulse current, providing direct electrical equivalence.
Category B - Alternative Clamping Voltage (19.9V): Parts with 19.9V maximum clamping voltage and 30.2A peak pulse current, offering lower clamping voltage with higher current capability within the same power dissipation envelope.
All substitute parts maintain identical reverse standoff voltage (12V), breakdown voltage (13.3V), package format (DO-214AA/SMB), and compliance certifications.
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Voltage - Reverse Standoff | Voltage - Breakdown (Min) | Voltage - Clamping (Max) @ Ipp | Current - Peak Pulse (10/1000µs) | Power - Peak Pulse | Package / Case | Operating Temperature | Product Status |
|---|---|---|---|---|---|---|---|---|---|
| SMBJ12C-E3/52 | Vishay General Semiconductor - Diodes Division | 12V | 13.3V | 22V | 27.3A | 600W | DO-214AA, SMB | -55°C ~ 150°C | Obsolete |
| SMBJ12CA-E3/52 | Vishay General Semiconductor - Diodes Division | 12V | 13.3V | 19.9V | 30.2A | 600W | DO-214AA, SMB | -55°C ~ 150°C | Active |
| SMBJ12CE3/TR13 | Microchip Technology | 12V | 13.3V | 22V | 27.3A | 600W | DO-214AA, SMB | -65°C ~ 150°C | Active |
| SMBJ12CA | EVVO Semi | 12V | 13.3V | 19.9V | 30.2A | 600W | DO-214AA, SMB | -65°C ~ 150°C | Active |
| SMBJ12CA-13-F | Diodes Incorporated | 12V | 13.3V | 19.9V | 30.2A | 600W | DO-214AA, SMB | -55°C ~ 150°C | Active |
| SMBJ12CA-HR | Littelfuse | 12V | 13.3V | 19.9V | 30.2A | 600W | DO-214AA, SMB | -65°C ~ 150°C | Active |
| SMBJ12CA-HRA | Littelfuse Inc. | 12V | 13.3V | 19.9V | 30.2A | 600W | DO-214AA, SMB | -65°C ~ 150°C | Active |
| SMBJ12CA-TR | STMicroelectronics | 12V | 13.3V | 19.9V | 31A | 600W | DO-214AA, SMB | -55°C ~ 150°C | Active |
| SMBJ12CAE3/TR13 | Microchip Technology | 12V | 13.3V | 19.9V | 30.2A | 600W | DO-214AA, SMB | -65°C ~ 150°C | Active |
Engineering Selection Recommendations
Primary Recommendation - Category A (Matched Clamping Voltage):
SMBJ12CE3/TR13 (Microchip Technology) provides direct electrical equivalence to the SMBJ12C-E3/52 with identical 22V clamping voltage and 27.3A peak pulse current. This part is active, ROHS3 compliant, and extends the operating temperature range to -65°C ~ 150°C. The extended temperature range provides additional design margin for demanding applications.
Secondary Recommendation - Category B (Alternative Clamping Voltage):
SMBJ12CA-E3/52 (Vishay General Semiconductor - Diodes Division) maintains the same manufacturer lineage as the original part with active product status. This part operates at 19.9V clamping voltage with 30.2A peak pulse current, delivering equivalent power dissipation (600W) within a lower voltage envelope. This configuration is suitable for applications where lower clamping voltage provides improved circuit protection margins.
Multi-Source Alternatives:
SMBJ12CA-13-F (Diodes Incorporated), SMBJ12CA-HR (Littelfuse), SMBJ12CA-HRA (Littelfuse Inc.), and SMBJ12CAE3/TR13 (Microchip Technology) all meet the electrical and mechanical requirements with active product status and ROHS3 compliance. Selection among these alternatives should be based on supply chain availability, packaging format preference (Cut Tape vs. Tape & Reel), and inventory requirements.
Frequently Asked Questions (FAQ)
Q: Can SMBJ12CA parts (19.9V clamping) be used as direct replacements for SMBJ12C-E3/52 (22V clamping)?
A: SMBJ12CA parts are electrically compatible substitutes with identical reverse standoff voltage (12V), breakdown voltage (13.3V), and package format (DO-214AA/SMB). The 19.9V clamping voltage is lower than the original 22V specification. This substitution is valid when circuit design margins accommodate the lower clamping voltage. The higher peak pulse current (30.2A vs. 27.3A) maintains equivalent power dissipation at 600W.
Q: What is the difference between SMBJ12CE3/TR13 and SMBJ12CAE3/TR13?
A: SMBJ12CE3/TR13 maintains the original 22V clamping voltage and 27.3A peak pulse current specification. SMBJ12CAE3/TR13 operates at 19.9V clamping voltage with 30.2A peak pulse current. Both are manufactured by Microchip Technology, are ROHS3 compliant, and use identical DO-214AA/SMB packaging. Selection depends on whether the circuit requires matched clamping voltage or can accept the lower voltage alternative.
Q: Are all substitute parts available in the same packaging formats?
A: Substitute parts are available in Cut Tape (CT) & Digi-Reel® or Tape & Reel (TR) packaging. All parts use the DO-214AA/SMB surface-mount package format. Packaging format selection should align with assembly process requirements and inventory management practices.
Q: What is the significance of the extended temperature range (-65°C vs. -55°C)?
A: Several substitute parts extend the minimum operating temperature to -65°C compared to the original -55°C specification. This extended range provides additional design margin for applications operating in cold environments or with stringent thermal requirements. The maximum temperature remains 150°C across all parts.
Q: Are all substitute parts ROHS3 compliant?
A: All substitute parts listed are ROHS3 compliant and carry Moisture Sensitivity Level 1 (Unlimited), matching the original SMBJ12C-E3/52 specifications. This ensures compatibility with modern manufacturing processes and environmental regulations.
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