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SMBJ7.0-E3/52 Equivalent & Substitute Parts
Part Overview
The SMBJ7.0-E3/52 is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the 7V reverse standoff voltage class with a 13.3V maximum clamping voltage and 45.1A peak pulse current rating. The device is packaged in DO-214AA (SMB) form factor and is rated for general-purpose transient voltage suppression applications across an operating temperature range of -55°C to 150°C.
The SMBJ7.0-E3/52 is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for new production runs and field replacements.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Reverse Standoff (Typ) | 7 | V |
| Voltage - Breakdown (Min) | 7.78 | V |
| Voltage - Clamping (Max) @ Ipp | 13.3 | V |
| Current - Peak Pulse (10/1000µs) | 45.1 | A |
| Power - Peak Pulse | 600 | W |
| Operating Temperature Range | -55 to 150 | °C (TJ) |
| Mounting Type | Surface Mount | — |
| Package / Case | DO-214AA, SMB | — |
| Type | Zener | — |
| Unidirectional Channels | 1 | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitution eligibility for the SMBJ7.0-E3/52 is determined by the following critical parameters:
- Reverse standoff voltage: 7V (±tolerance)
- Breakdown voltage minimum: 7.78V or higher
- Clamping voltage maximum: 12V to 13.3V range
- Peak pulse current: 45.1A or higher
- Peak pulse power: 600W or higher
- Package type: DO-214AA or SMB equivalent
- Mounting type: Surface mount
- Operating temperature range: Must support -55°C minimum and 150°C maximum, or equivalent
- Compliance: ROHS3 compliant, MSL 1
Substitute parts are grouped into two categories:
Direct Electrical Equivalents: Parts with identical or superior electrical performance within the specified voltage and current parameters, maintaining the same functional characteristics.
Functional Equivalents: Parts with comparable voltage regulation and current handling capabilities that satisfy the same circuit protection requirements, with minor variations in clamping voltage or peak current within acceptable engineering tolerances.
Parameter Comparison
| Part Number | Manufacturer | Reverse Standoff (V) | Breakdown Min (V) | Clamping Max (V) | Peak Pulse Current (A) | Peak Pulse Power (W) | Temp Range (°C) | Package | Status |
|---|---|---|---|---|---|---|---|---|---|
| SMBJ7.0-E3/52 | Vishay | 7 | 7.78 | 13.3 | 45.1 | 600 | -55 to 150 | DO-214AA | Obsolete |
| SMBJ7.0A-E3/52 | Vishay | 7 | 7.78 | 12 | 50 | 600 | -55 to 150 | DO-214AA | Active |
| SMBJ7.0E3/TR13 | Microchip Technology | 7 | 7.78 | 13.3 | 45.1 | 600 | -65 to 150 | DO-214AA | Active |
| 1KSMB8.2A | Littelfuse Inc. | 7.02 | 7.79 | 12.1 | 82.6 | 1000 | -55 to 150 | DO-214AA | Active |
| P6SMB8.2A | Taiwan Semiconductor Corporation | 7.02 | 7.79 | 12.1 | 52 | 600 | -55 to 150 | DO-214AA | Active |
| SACB7.0 | Littelfuse Inc. | 7 | 8.33 | 12.6 | 38 | 500 | -55 to 150 | SMB | Active |
| SMBJ7.0A | MDD | 7 | 7.78 | 12 | 50 | 600 | -50 to 150 | DO-214AA | Active |
| SMBJ7.0A-13-F | Diodes Incorporated | 7 | 7.78 | 12 | 50 | 600 | -55 to 150 | DO-214AA | Active |
| SMBJ7.0A-HR | Littelfuse Inc. | 7 | 7.78 | 12 | 50 | 600 | -65 to 150 | DO-214AA | Active |
| SMBJ7.0A-HRA | Littelfuse Inc. | 7 | 7.78 | 12 | 50 | 600 | -65 to 150 | DO-214AA | Active |
Engineering Selection Recommendations
Primary Recommendation: SMBJ7.0E3/TR13 (Microchip Technology)
This part provides direct electrical equivalence to the SMBJ7.0-E3/52 with identical clamping voltage (13.3V) and peak pulse current (45.1A). The extended operating temperature range (-65°C to 150°C) exceeds the original specification. Active product status ensures long-term availability. ROHS3 compliant with MSL 1 rating.
Secondary Recommendation: SMBJ7.0A-E3/52 (Vishay)
Manufactured by the original supplier, this active part maintains the same reverse standoff voltage and breakdown characteristics. The clamping voltage is reduced to 12V with increased peak pulse current to 50A, providing superior transient suppression capability. Identical temperature range and compliance certifications.
Alternative Recommendation: SMBJ7.0A-HR (Littelfuse Inc.)
Offers extended operating temperature range (-65°C to 150°C) with active product status. Electrical parameters are compatible with the original design. Suitable for applications requiring enhanced thermal performance.
Higher Power Alternative: 1KSMB8.2A (Littelfuse Inc.)
For applications requiring increased transient energy absorption, this part provides 1000W peak pulse power versus 600W in the original design. Voltage parameters remain within acceptable tolerance. Active status with full compliance certifications.
All recommended substitutes are ROHS3 compliant with MSL 1 rating, matching the original part's environmental and regulatory requirements.
Frequently Asked Questions (FAQ)
Q: Can SMBJ7.0A-E3/52 be used as a direct replacement for SMBJ7.0-E3/52?
A: Yes. Both parts share identical reverse standoff voltage (7V) and breakdown voltage (7.78V). The SMBJ7.0A-E3/52 features a 12V clamping voltage versus 13.3V in the original, with increased peak pulse current (50A versus 45.1A). This represents improved transient suppression performance within the same package and compliance framework.
Q: What is the difference between SMBJ7.0A-HR and SMBJ7.0A-HRA?
A: Both parts are manufactured by Littelfuse Inc. with identical electrical specifications. The designation difference reflects internal product line management. Electrical performance, package type, and compliance certifications are equivalent.
Q: Is the SACB7.0 suitable as a substitute?
A: The SACB7.0 meets the reverse standoff voltage requirement (7V) and operates within the same temperature range. However, the peak pulse current is 38A, which is below the original 45.1A specification. This part is suitable only for applications where the lower current rating is acceptable.
Q: Why does the 1KSMB8.2A have higher peak pulse power?
A: The 1KSMB8.2A is rated for 1000W peak pulse power compared to 600W in the original design. This reflects the part's enhanced thermal dissipation capability and is suitable for high-energy transient suppression applications. The voltage parameters remain compatible with the original circuit protection requirements.
Q: Are all substitute parts available in the same package?
A: All recommended substitutes use DO-214AA (SMB) or equivalent surface mount packaging. The SACB7.0 uses SMB designation, which is mechanically and electrically compatible with DO-214AA. Footprint compatibility is maintained across all listed alternatives.
Q: What compliance certifications apply to these substitute parts?
A: All substitute parts listed are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. REACH status is unaffected for all parts. These certifications match the original SMBJ7.0-E3/52 requirements.
Q: Can I use SMBJ7.0E3/TR13 in place of SMBJ7.0-E3/52?
A: Yes. This Microchip part provides identical electrical performance with extended temperature range (-65°C versus -55°C minimum). The active product status and full compliance certifications make it a direct functional equivalent suitable for new designs and field replacements.
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