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SMBJ20C-E3/52 Equivalent & Substitute Parts
Part Overview
The SMBJ20C-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 20V reverse standoff voltage and provides 35.8V maximum clamping voltage at peak pulse current. The device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. Substitute parts must maintain electrical compatibility across voltage ratings, current handling, and thermal operating ranges while accommodating different packaging and manufacturer options.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Voltage - Reverse Standoff (Typ) | 20V |
| Voltage - Breakdown (Min) | 22.2V |
| Voltage - Clamping (Max) @ Ipp | 35.8V |
| Current - Peak Pulse (10/1000µs) | 16.8A |
| Power - Peak Pulse | 600W |
| Operating Temperature Range | -55°C ~ 150°C (TJ) |
| Package / Case | DO-214AA, SMB |
| Mounting Type | Surface Mount |
| Type | Zener |
| Bidirectional Channels | 1 |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution for the SMBJ20C-E3/52 is determined by strict adherence to the following electrical and mechanical parameters:
Primary Substitution Criteria:
- Voltage - Reverse Standoff: 20V (exact match required)
- Voltage - Breakdown (Min): 22.2V (exact match required)
- Package / Case: DO-214AA or SMB (mechanical compatibility)
- Mounting Type: Surface Mount (required)
- Type: Zener (required)
- Bidirectional Channels: 1 (required)
Secondary Compatibility Parameters:
- Voltage - Clamping (Max) @ Ipp: 32.4V to 35.8V (acceptable range for general-purpose protection)
- Current - Peak Pulse (10/1000µs): 16.7A to 30.9A (higher current ratings acceptable for enhanced protection margin)
- Power - Peak Pulse: 600W to 1000W (higher power ratings acceptable)
- Operating Temperature Range: -55°C to -65°C minimum; 150°C to 175°C maximum (equal or wider range acceptable)
- RoHS Status: ROHS3 Compliant (required)
Substitute parts are grouped by electrical performance tier and manufacturer availability. Parts with identical clamping voltage (35.8V) and similar current ratings (16.7A-16.8A) provide direct functional equivalence. Parts with lower clamping voltage (32.4V) and higher current ratings (18.5A-30.9A) offer enhanced protection characteristics suitable for the same application space. All substitutes maintain the same reverse standoff and breakdown voltage specifications.
Parameter Comparison
| Part Number | Manufacturer | Voltage - Reverse Standoff | Voltage - Breakdown (Min) | Voltage - Clamping (Max) @ Ipp | Current - Peak Pulse (10/1000µs) | Power - Peak Pulse | Operating Temperature | Package | Product Status |
|---|---|---|---|---|---|---|---|---|---|
| SMBJ20C-E3/52 | Vishay General Semiconductor | 20V | 22.2V | 35.8V | 16.8A | 600W | -55°C ~ 150°C | DO-214AA (SMBJ) | Obsolete |
| SMBJ20CA-E3/52 | Vishay General Semiconductor | 20V | 22.2V | 32.4V | 18.5A | 600W | -55°C ~ 150°C | DO-214AA (SMBJ) | Active |
| SMBJ20CAE3/TR13 | Microchip Technology | 20V | 22.2V | 32.4V | 18.5A | 600W | -65°C ~ 150°C | DO-214AA (SMBJ) | Active |
| SMBJ20CE3/TR13 | Microchip Technology | 20V | 22.2V | 35.8V | 16.7A | 600W | -65°C ~ 150°C | DO-214AA (SMBJ) | Active |
| 1SMB20CA TR13 PBFREE | Central Semiconductor Corp | 20V | 22.2V | 32.4V | 18.5A | 600W | -65°C ~ 150°C | DO-214AA (SMB) | Active |
| ATV06B200JB-HF | Comchip Technology | 20V | 22.2V | 32.4V | 18.52A | 600W | -55°C ~ 150°C | DO-214AA (SMB) | Active |
| SMB10J20CA | Formosa Microsemi Co., Ltd. | 20V | 22.2V | 32.4V | 30.9A | 1000W | -55°C ~ 175°C | DO-214AA (SMB) | Active |
| SMB10J20CA R5G | Taiwan Semiconductor Corporation | 20V | 22.2V | 32.4V | 30.9A | 1000W | -55°C ~ 175°C | DO-214AA (SMB) | Discontinued at DiGi Electronics |
| SMB10J20CA-TP | Micro Commercial Co | 20V | 22.2V | 32.4V | 30.86A | 1000W | -55°C ~ 150°C | DO-214AA (SMB) | Active |
| SMB10J20CAH | Taiwan Semiconductor Corporation | 20V | 22.2V | 32.4V | 30.9A | 1000W | -55°C ~ 175°C | DO-214AA (SMB) | Active |
| SMB10J20CAHR5G | Taiwan Semiconductor Corporation | 20V | 22.2V | 32.4V | 30.9A | 1000W | -55°C ~ 175°C | DO-214AA (SMB) | Discontinued at DiGi Electronics |
Engineering Selection Recommendations
Direct Functional Equivalents (Preferred for Drop-In Replacement):
SMBJ20CE3/TR13 (Microchip Technology) provides the closest electrical match with identical 35.8V clamping voltage and 16.7A peak pulse current. This part maintains active product status and extends the operating temperature range to -65°C, offering improved thermal margin. The Tape & Reel packaging supports automated assembly processes.
SMBJ20CA-E3/52 (Vishay General Semiconductor) offers active product status from the original manufacturer with compatible electrical characteristics. The 32.4V clamping voltage and 18.5A peak pulse current provide acceptable protection performance within the same application class.
Enhanced Protection Alternatives (Higher Current Rating):
SMB10J20CA, SMB10J20CAH, and SMB10J20CA-TP represent the SMB10J series with 30.9A peak pulse current and 1000W power dissipation. These parts deliver superior transient protection margin and extended operating temperature ranges (-55°C to 175°C). Selection from this group depends on packaging requirements: Tape & Reel for automated assembly (SMB10J20CAH) or Bulk packaging (SMB10J20CA-TP).
Automotive-Grade Options:
ATV06B200JB-HF (Comchip Technology) and SMB10J20CAH meet AEC-Q101 automotive qualification standards. These parts are suitable for applications requiring automotive-grade component certification while maintaining electrical compatibility with the original specification.
Availability and Compliance:
All recommended substitutes maintain ROHS3 compliance and REACH unaffected status. Parts with active product status (SMBJ20CA-E3/52, SMBJ20CAE3/TR13, SMBJ20CE3/TR13, 1SMB20CA TR13 PBFREE, ATV06B200JB-HF, SMB10J20CA, SMB10J20CA-TP, SMB10J20CAH) ensure long-term procurement availability. Discontinued parts (SMB10J20CA R5G, SMB10J20CAHR5G) should be avoided for new designs unless existing inventory is available.
Frequently Asked Questions (FAQ)
Q: Can SMBJ20CA-E3/52 directly replace SMBJ20C-E3/52?
A: Yes. Both parts share identical reverse standoff voltage (20V), breakdown voltage (22.2V), and package specifications (DO-214AA). The SMBJ20CA-E3/52 has lower clamping voltage (32.4V vs 35.8V) and higher peak pulse current (18.5A vs 16.8A), providing acceptable protection performance for general-purpose applications. SMBJ20CA-E3/52 maintains active product status from Vishay.
Q: What is the difference between SMBJ and SMB10J series parts?
A: The SMB10J series (SMB10J20CA, SMB10J20CAH) delivers higher peak pulse current (30.9A) and power dissipation (1000W) compared to standard SMBJ series (16.8A, 600W). Both maintain identical voltage specifications. SMB10J parts provide enhanced protection margin for applications with higher transient stress or requiring extended thermal headroom.
Q: Are Microchip SMBJ20CAE3/TR13 and SMBJ20CE3/TR13 interchangeable?
A: Both are Microchip products with identical voltage specifications and active status. SMBJ20CE3/TR13 matches the original 35.8V clamping voltage, while SMBJ20CAE3/TR13 provides 32.4V clamping with higher current (18.5A). Selection depends on whether the original clamping voltage specification is critical to circuit performance.
Q: What packaging options are available for substitutes?
A: Substitute parts are available in Tape & Reel (TR) for automated assembly, Cut Tape (CT) for manual assembly, and Bulk packaging. All maintain DO-214AA or SMB package compatibility with the original part. Tape & Reel packaging is recommended for production volumes.
Q: Do automotive-grade parts (ATV06B200JB-HF, SMB10J20CAH) work in non-automotive applications?
A: Yes. Automotive-grade parts meet AEC-Q101 qualification and maintain full electrical compatibility with general-purpose specifications. These parts can be used in any application requiring the specified voltage and current ratings. Automotive qualification provides additional reliability assurance.
Q: What is the temperature range difference between substitute parts?
A: The original SMBJ20C-E3/52 operates -55°C to 150°C. Microchip parts extend to -65°C minimum. SMB10J series parts extend to 175°C maximum. Wider temperature ranges provide additional design margin but are not required for direct substitution unless the application operates at temperature extremes.
Q: Can I use SMB10J20CA R5G or SMB10J20CAHR5G for new designs?
A: These parts are discontinued at DiGi Electronics and should not be selected for new designs. Use active alternatives: SMB10J20CA (Formosa Microsemi), SMB10J20CAH (Taiwan Semiconductor), or SMB10J20CA-TP (Micro Commercial Co) instead.
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