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SMB8J8.0C-E3/52 Equivalent & Substitute Parts
Part Overview
The SMB8J8.0C-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 component features an 8V reverse standoff voltage with 15V maximum clamping voltage and 53.3A peak pulse current capability in a DO-214AA (SMB) package. The part is currently listed as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for new designs and production continuity.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Voltage - Reverse Standoff (Typ) | 8V |
| Voltage - Breakdown (Min) | 8.89V |
| Voltage - Clamping (Max) @ Ipp | 15V |
| Current - Peak Pulse (10/1000µs) | 53.3A |
| Power - Peak Pulse | 800W |
| Package / Case | DO-214AA, SMB |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -55°C ~ 150°C (TJ) |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution eligibility for the SMB8J8.0C-E3/52 is determined by the following critical parameters:
Primary Matching Criteria:
- Voltage - Reverse Standoff (Typ): 8V
- Package / Case: DO-214AA, SMB
- Mounting Type: Surface Mount
- Bidirectional Channels: 1
Secondary Compatibility Parameters:
- Voltage - Breakdown (Min): 8.89V
- Voltage - Clamping (Max) @ Ipp: 13.6V to 15V range
- Current - Peak Pulse (10/1000µs): 40A to 58.8A range
- Power - Peak Pulse: 600W to 800W range
- Operating Temperature: -55°C to -65°C minimum, 150°C maximum
- RoHS Status: ROHS3 Compliant
All identified substitute parts maintain the core 8V standoff voltage and DO-214AA SMB package specification. Variations in clamping voltage (13.6V vs 15V) and peak pulse current represent acceptable performance ranges within the same device category. All substitutes are active products with current manufacturing status and full RoHS3 compliance.
Parameter Comparison
| Part Number | Manufacturer | Voltage - Reverse Standoff | Voltage - Clamping (Max) @ Ipp | Current - Peak Pulse | Power - Peak Pulse | Operating Temperature | Product Status | Package |
|---|---|---|---|---|---|---|---|---|
| SMB8J8.0C-E3/52 | Vishay | 8V | 15V | 53.3A | 800W | -55°C ~ 150°C | Obsolete | DO-214AA (SMB) |
| SMB8J8.0CA-E3/52 | Vishay | 8V | 13.6V | 58.8A | 800W | -55°C ~ 150°C | Active | DO-214AA (SMB) |
| SMBJ8.0CA | MDD | 8V | 13.6V | 44.2A | 600W | -50°C ~ 150°C | Active | DO-214AA (SMB) |
| SMBJ8.0CA-13-F | Diodes Incorporated | 8V | 13.6V | 44.1A | 600W | -55°C ~ 150°C | Active | DO-214AA (SMB) |
| SMBJ8.0CA-TP | Micro Commercial Co | 8V | 13.6V | 44.1A | 600W | -55°C ~ 175°C | Active | DO-214AA (SMB) |
| SMBJ8.0CAE3/TR13 | Microchip Technology | 8V | 13.6V | 44.1A | 600W | -65°C ~ 150°C | Active | DO-214AA (SMB) |
| SMBJ8.0CE3/TR13 | Microchip Technology | 8V | 15V | 40A | 600W | -65°C ~ 150°C | Active | DO-214AA (SMB) |
| SMBJ8V0CA | Taiwan Semiconductor Corporation | 8V | 13.6V | 44.1A | 600W | -55°C ~ 150°C | Active | DO-214AA (SMB) |
Engineering Selection Recommendations
Primary Recommendation: SMB8J8.0CA-E3/52 (Vishay)
This part is the direct active equivalent from the original manufacturer. It maintains identical reverse standoff voltage (8V), package specification (DO-214AA SMB), and operating temperature range (-55°C ~ 150°C). The clamping voltage is reduced to 13.6V with increased peak pulse current to 58.8A, both within acceptable performance parameters for the same application class. Full RoHS3 compliance and MSL 1 rating are maintained. This selection provides maximum design continuity with the obsolete SMB8J8.0C-E3/52.
Secondary Recommendations:
SMBJ8.0CA-13-F (Diodes Incorporated) and SMBJ8.0CA-TP (Micro Commercial Co) are functionally equivalent alternatives with identical electrical parameters (8V standoff, 13.6V clamping, 44.1A peak pulse). Both maintain RoHS3 compliance and MSL 1 rating. SMBJ8.0CA-TP offers extended upper operating temperature to 175°C. These options provide supply diversification while maintaining full electrical compatibility.
Clamping Voltage Consideration:
SMBJ8.0CE3/TR13 (Microchip Technology) maintains the original 15V clamping voltage specification with 40A peak pulse current. This selection is appropriate for applications requiring the specific 15V clamping characteristic of the original part. Extended temperature range (-65°C ~ 150°C) provides additional thermal margin.
Minimum Temperature Range Consideration:
SMBJ8.0CAE3/TR13 (Microchip Technology) extends the minimum operating temperature to -65°C, suitable for applications requiring enhanced cold-temperature performance beyond the standard -55°C specification.
All recommended substitutes are active products with current manufacturing status, full RoHS3 compliance, and MSL 1 moisture sensitivity rating.
Frequently Asked Questions (FAQ)
Q: Can SMB8J8.0CA-E3/52 directly replace SMB8J8.0C-E3/52 in existing designs?
A: Yes. Both parts share identical reverse standoff voltage (8V), package specification (DO-214AA SMB), and operating temperature range (-55°C ~ 150°C). The SMB8J8.0CA-E3/52 is the active equivalent from Vishay and is the recommended replacement for the obsolete SMB8J8.0C-E3/52.
Q: What is the difference between 13.6V and 15V clamping voltage specifications?
A: Clamping voltage represents the maximum voltage across the TVS diode during transient suppression at peak pulse current. The original SMB8J8.0C-E3/52 specifies 15V clamping. Most active substitutes specify 13.6V clamping, which provides tighter voltage regulation during transient events. For applications requiring the specific 15V clamping characteristic, SMBJ8.0CE3/TR13 maintains this specification.
Q: Are all substitute parts RoHS3 compliant?
A: Yes. All identified substitute parts are RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level, matching the compliance profile of the original SMB8J8.0C-E3/52.
Q: What is the significance of different peak pulse current ratings (40A to 58.8A)?
A: Peak pulse current indicates the maximum transient current the TVS diode can safely suppress during a 10/1000µs pulse. Higher ratings provide greater transient energy absorption capability. The original part specifies 53.3A. Substitutes range from 40A to 58.8A, all within acceptable performance parameters for general-purpose overvoltage protection applications. Selection should be based on specific transient energy requirements of the application circuit.
Q: Do all substitutes use the same DO-214AA SMB package?
A: Yes. All identified substitute parts use the DO-214AA (SMB) surface-mount package, ensuring mechanical and footprint compatibility with designs originally specified for SMB8J8.0C-E3/52.
Q: What is the difference between tape & reel and bulk packaging options?
A: Packaging designation (such as -E3/52, -TP, or -TR13) indicates the supplier packaging format and reel specifications for automated assembly. These variations do not affect electrical performance or mechanical compatibility. Selection should be based on production assembly equipment requirements and supply chain availability.
Q: Can I use SMBJ8.0CA-TP for applications requiring extended temperature operation?
A: Yes. SMBJ8.0CA-TP extends the maximum operating temperature to 175°C compared to the standard 150°C specification of most alternatives. This part is suitable for applications requiring enhanced high-temperature performance while maintaining all other electrical specifications.
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