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SMBJ5.0HE3/52 Transient Voltage Suppressor Diode - Equivalent & Substitute Parts
Part Overview
The SMBJ5.0HE3/52 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division in the DO-214AA (SMB) surface mount package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and production continuity. The part operates with a 5V reverse standoff voltage and provides 9.6V maximum clamping voltage at peak pulse current, delivering 600W peak pulse power dissipation for transient protection applications.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Reverse Standoff (Typ) | 5 | V |
| Voltage - Breakdown (Min) | 6.4 | V |
| Voltage - Clamping (Max) @ Ipp | 9.6 | V |
| Current - Peak Pulse (10/1000µs) | 62.5 | A |
| Power - Peak Pulse | 600 | W |
| Operating Temperature Range | -55 to 150 | °C (TJ) |
| Type | Zener | - |
| Unidirectional Channels | 1 | - |
| Mounting Type | Surface Mount | - |
| Package / Case | DO-214AA, SMB | - |
| RoHS Status | ROHS3 Compliant | - |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | - |
Substitute Part Grouping Explanation
Substitution for the SMBJ5.0HE3/52 is determined by the following critical parameters:
- Voltage Rating: Reverse standoff voltage of 5V and breakdown voltage minimum of 6.4V
- Clamping Voltage: Maximum clamping voltage at peak pulse current (9.6V nominal for primary part; 9.2V acceptable for active substitutes)
- Peak Pulse Current: Minimum 62.5A at 10/1000µs pulse
- Power Dissipation: 600W peak pulse capability
- Package: DO-214AA (SMB) surface mount form factor
- Polarity: Unidirectional (single channel) configuration
- Compliance: ROHS3 compliant, MSL 1 rating
Substitute parts are grouped into two categories:
Category A - Direct Electrical Equivalents (9.6V Clamping): SMBJ5.0E3/TR13 from Microchip Technology maintains the exact 9.6V clamping specification of the original part.
Category B - Functional Equivalents (9.2V Clamping): SMBJ5.0A variants from EVVO Semi, Diodes Incorporated, Littelfuse Inc., Micro Commercial Co, STMicroelectronics, and Fairchild Semiconductor operate at 9.2V clamping voltage with peak pulse currents ranging from 65.2A to 68A, providing equivalent transient suppression performance within acceptable tolerance margins.
Category C - Limited Compatibility: SMBSAC5.0-TP is a bidirectional TVS diode with different electrical characteristics (10V clamping, 44A peak pulse) and is suitable only for applications where bidirectional protection is required and the higher clamping voltage is acceptable.
Parameter Comparison
| Part Number | Manufacturer | Voltage - Reverse Standoff (V) | Voltage - Breakdown Min (V) | Voltage - Clamping Max @ Ipp (V) | Current - Peak Pulse (A) | Power - Peak Pulse (W) | Operating Temp (°C) | Product Status | Package |
|---|---|---|---|---|---|---|---|---|---|
| SMBJ5.0HE3/52 | Vishay General Semiconductor | 5 | 6.4 | 9.6 | 62.5 | 600 | -55 to 150 | Obsolete | DO-214AA (SMBJ) |
| SMBJ5.0E3/TR13 | Microchip Technology | 5 | 6.4 | 9.6 | 62.5 | 600 | -65 to 150 | Active | DO-214AA (SMBJ) |
| SMBJ5.0A | EVVO Semi | 5 | 6.4 | 9.2 | 65.3 | 600 | -65 to 150 | Active | DO-214AA (SMB) |
| SMBJ5.0A-13-F | Diodes Incorporated | 5 | 6.4 | 9.2 | 65.2 | 600 | -55 to 150 | Active | DO-214AA (SMB) |
| SMBJ5.0A-HR | Littelfuse Inc. | 5 | 6.4 | 9.2 | 65.3 | 600 | -65 to 150 | Active | DO-214AA (SMBJ) |
| SMBJ5.0A-TP | Micro Commercial Co | 5 | 6.4 | 9.2 | 65.2 | 600 | -55 to 175 | Active | DO-214AA (SMB) |
| SMBJ5.0A-TR | STMicroelectronics | 5 | 6.4 | 9.2 | 68 | 600 | -55 to 150 | Active | DO-214AA (SMB) |
| SMBJ5V0A | Fairchild Semiconductor | 5 | 6.4 | 9.2 | 65.2 | 600 | -55 to 150 | Active | DO-214AA (SMB) |
| SMBSAC5.0-TP | Micro Commercial Co | 5 | 7.6 | 10 | 44 | 500 | -55 to 175 | Active | DO-214AA (SMB) |
Engineering Selection Recommendations
Primary Recommendation: SMBJ5.0E3/TR13 (Microchip Technology) is the direct electrical equivalent, maintaining identical clamping voltage (9.6V) and peak pulse current (62.5A) specifications. This part is active in production with extended operating temperature range (-65°C to 150°C) and ROHS3 compliance.
Secondary Recommendations: SMBJ5.0A variants from EVVO Semi, Diodes Incorporated, Littelfuse Inc., Micro Commercial Co, STMicroelectronics, and Fairchild Semiconductor are functionally equivalent with 9.2V clamping voltage and peak pulse currents of 65.2A to 68A. All are active production parts with ROHS3 compliance. Selection among these variants depends on packaging preference (tape & reel vs. cut tape), operating temperature requirements, and supplier availability.
Not Recommended for Direct Substitution: SMBSAC5.0-TP is a bidirectional TVS diode with different electrical characteristics (10V clamping, 44A peak pulse, 500W power rating) and should be used only when bidirectional transient protection is required and the higher clamping voltage is acceptable for the application.
Frequently Asked Questions (FAQ)
Q: Can SMBJ5.0A parts with 9.2V clamping replace the original SMBJ5.0HE3/52 with 9.6V clamping?
A: Yes. The 9.2V clamping voltage of active SMBJ5.0A variants is within acceptable tolerance for most transient suppression applications. The 0.4V difference represents a 4.2% reduction in clamping voltage. Peak pulse current ratings of 65.2A to 68A exceed the original 62.5A specification, providing equivalent or superior transient energy absorption.
Q: What is the difference between unidirectional and bidirectional TVS diodes?
A: Unidirectional TVS diodes (like SMBJ5.0HE3/52 and SMBJ5.0A variants) protect against transients in one polarity direction. Bidirectional TVS diodes (like SMBSAC5.0-TP) protect against transients in both polarities. Selection depends on circuit protection requirements.
Q: Does packaging format affect electrical performance?
A: No. DO-214AA (SMB) packaging is standardized across all listed substitutes. Packaging format differences (tape & reel vs. cut tape) affect handling and assembly processes but not electrical characteristics. Supplier device package designations (SMBJ vs. SMB) refer to the same physical form factor.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All listed substitute parts are ROHS3 compliant with MSL 1 (unlimited moisture sensitivity level), matching the compliance profile of the original SMBJ5.0HE3/52.
Q: What operating temperature range should I select?
A: The original part operates from -55°C to 150°C. Microchip SMBJ5.0E3/TR13, EVVO Semi SMBJ5.0A, and Littelfuse SMBJ5.0A-HR extend the lower limit to -65°C. Micro Commercial Co SMBJ5.0A-TP extends the upper limit to 175°C. Select based on your application's thermal requirements.
Q: Is SMBSAC5.0-TP a suitable substitute?
A: SMBSAC5.0-TP is not a direct substitute due to bidirectional polarity, higher clamping voltage (10V), lower peak pulse current (44A), and reduced power rating (500W). Use only if your application requires bidirectional transient protection and can tolerate these electrical differences.
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