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SMBJ12CA-TP Equivalent & Substitute Parts
Part Overview
The SMBJ12CA-TP is a transient voltage suppressor (TVS) diode manufactured by Micro Commercial Co, designed for general-purpose overvoltage protection in surface-mount applications. This zener-type TVS diode operates with a 12V reverse standoff voltage and provides clamping at 19.9V maximum, with a peak pulse current rating of 30.2A. The component is actively produced and ROHS3 compliant, making it suitable for modern electronic circuit protection requirements.
Equivalent and substitute parts are identified based on matching electrical performance parameters and compatible packaging specifications. Substitutes maintain identical voltage ratings, current handling capabilities, and thermal operating ranges within acceptable engineering tolerances.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Reverse Standoff (Typ) | 12 | V |
| Voltage - Breakdown (Min) | 13.3 | V |
| Voltage - Clamping (Max) @ Ipp | 19.9 | V |
| Current - Peak Pulse (10/1000µs) | 30.2 | A |
| Power - Peak Pulse | 600 | W |
| Operating Temperature Range | -55 to 175 | °C (TJ) |
| Package / Case | DO-214AA, SMB | — |
| Mounting Type | Surface Mount | — |
| Type | Zener | — |
| Bidirectional Channels | 1 | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitute parts for the SMBJ12CA-TP are qualified based on the following critical parameters:
- Voltage - Reverse Standoff: 12V (exact match required)
- Voltage - Clamping (Max) @ Ipp: 19.9V (exact match required)
- Current - Peak Pulse (10/1000µs): 30.2A minimum (31A acceptable within tolerance)
- Power - Peak Pulse: 600W (exact match required)
- Package / Case: DO-214AA, SMB (mechanical compatibility)
- Mounting Type: Surface Mount (required)
- Type: Zener, Bidirectional, 1 Channel (functional equivalence)
- RoHS Status: ROHS3 Compliant (regulatory requirement)
- MSL: 1 (Unlimited) (handling requirement)
Substitutes are grouped into two categories: direct equivalents (identical electrical and packaging specifications) and similar parts (minor variations in peak pulse current within acceptable tolerance or packaging format differences).
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Voltage - Reverse Standoff (V) | Voltage - Clamping (Max) @ Ipp (V) | Current - Peak Pulse (A) | Power - Peak Pulse (W) | Operating Temperature (°C) | Package | Packaging Type | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|
| SMBJ12CA-TP | Micro Commercial Co | 12 | 19.9 | 30.2 | 600 | -55 to 175 | DO-214AA, SMB | Tape & Reel (TR) | ROHS3 Compliant |
| 1SMB12CA TR13 PBFREE | Central Semiconductor Corp | 12 | 19.9 | 30.2 | 600 | -65 to 150 | DO-214AA, SMB | Tape & Reel (TR) | ROHS3 Compliant |
| SMBJ12CA | EVVO Semi | 12 | 19.9 | 30.2 | 600 | -65 to 150 | DO-214AA, SMB | Cut Tape (CT) & Digi-Reel® | ROHS3 Compliant |
| SMBJ12CA-13-F | Diodes Incorporated | 12 | 19.9 | 30.2 | 600 | -55 to 150 | DO-214AA, SMB | Tape & Reel (TR) | ROHS3 Compliant |
| SMBJ12CA-E3/52 | Vishay General Semiconductor - Diodes Division | 12 | 19.9 | 30.2 | 600 | -55 to 150 | DO-214AA, SMB | Cut Tape (CT) & Digi-Reel® | ROHS3 Compliant |
| SMBJ12CA-E3/5B | Vishay General Semiconductor - Diodes Division | 12 | 19.9 | 30.2 | 600 | -55 to 150 | DO-214AA, SMB | Tape & Reel (TR) | ROHS3 Compliant |
| SMBJ12CAE3/TR13 | Microchip Technology | 12 | 19.9 | 30.2 | 600 | -65 to 150 | DO-214AA, SMB | Tape & Reel (TR) | ROHS3 Compliant |
| SMBJ12CA-TR | STMicroelectronics | 12 | 19.9 | 31 | 600 | -55 to 150 | DO-214AA, SMB | Cut Tape (CT) & Digi-Reel® | ROHS3 Compliant |
Engineering Selection Recommendations
All listed substitute parts maintain active product status and ROHS3 compliance, meeting current regulatory requirements for electronic component procurement. Selection among equivalent parts should be based on:
Packaging Format Compatibility: Parts available in Tape & Reel (TR) format are suitable for automated assembly processes. Parts available in Cut Tape (CT) & Digi-Reel® format are suitable for manual assembly or lower-volume production runs.
Thermal Operating Range: The SMBJ12CA-TP operates from -55°C to 175°C. Substitute parts from Central Semiconductor Corp, EVVO Semi, and Microchip Technology operate from -65°C to 150°C, providing lower temperature capability but reduced upper temperature limit. Parts from Diodes Incorporated, Vishay, and STMicroelectronics operate from -55°C to 150°C, matching the lower temperature limit of the original part but with a 25°C reduction in maximum operating temperature.
Peak Pulse Current: The STMicroelectronics SMBJ12CA-TR variant specifies 31A peak pulse current, compared to 30.2A for all other parts. This 0.8A difference remains within typical manufacturing tolerance for TVS diodes and does not affect functional equivalence.
Inventory Availability: EVVO Semi SMBJ12CA offers the highest inventory level (112,045 pcs), providing supply chain flexibility. All other substitutes maintain adequate stock levels for production requirements.
Frequently Asked Questions (FAQ)
Q: Can SMBJ12CA-TP be directly replaced with SMBJ12CA from EVVO Semi?
A: Yes. Both parts share identical electrical specifications: 12V reverse standoff, 19.9V clamping voltage, 30.2A peak pulse current, and 600W peak pulse power. Both are ROHS3 compliant with MSL 1 rating. The primary difference is packaging format (Tape & Reel vs. Cut Tape & Digi-Reel®) and operating temperature range (-55 to 175°C vs. -65 to 150°C). For applications operating within -55°C to 150°C, this substitution is electrically and mechanically compatible.
Q: What is the difference between Tape & Reel and Cut Tape & Digi-Reel® packaging?
A: Tape & Reel (TR) packaging provides components on continuous carrier tape wound on a reel, optimized for high-speed automated pick-and-place assembly. Cut Tape (CT) & Digi-Reel® packaging provides components on cut tape segments or alternative reel formats, suitable for lower-volume production or manual assembly processes. Both formats use the same DO-214AA (SMB) component package.
Q: Are there thermal performance differences between substitute parts?
A: The SMBJ12CA-TP operates to 175°C junction temperature. Substitute parts from Central Semiconductor Corp, EVVO Semi, and Microchip Technology are rated to 150°C maximum, representing a 25°C reduction. For applications requiring operation above 150°C, the original SMBJ12CA-TP or parts from Diodes Incorporated, Vishay, or STMicroelectronics (all rated to 150°C minimum) are required. The SMBJ12CA-TP's extended upper temperature rating provides additional thermal margin for high-dissipation applications.
Q: Is the 31A peak pulse current specification of STMicroelectronics SMBJ12CA-TR acceptable as a substitute?
A: Yes. The 31A specification represents a 0.8A increase over the 30.2A baseline and falls within normal manufacturing tolerance for TVS diodes. This variation does not affect functional equivalence or circuit protection performance. The part remains electrically compatible for all applications requiring 30.2A minimum peak pulse current capability.
Q: Do all substitute parts meet the same compliance requirements?
A: Yes. All listed substitute parts are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity rating. All parts are classified under ECCN EAR99 and HTSUS 8541.10.0080, matching the regulatory classification of the original SMBJ12CA-TP.
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