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P6SMB82 Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts
Part Overview
The P6SMB82 is a unidirectional Zener-type transient voltage suppressor manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component features a 70.1V reverse standoff voltage with 118.65V maximum clamping voltage and 5.4A peak pulse current capability in a DO-214AA (SMB) package. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Manufacturer Part Number | P6SMB82 | — |
| Manufacturer | Littelfuse Inc. | — |
| Category | Transient Voltage Suppressors (TVS) | — |
| Type | Zener | — |
| Unidirectional Channels | 1 | — |
| Voltage - Reverse Standoff (Typ) | 70.1 | V |
| Voltage - Breakdown (Min) | 73.8 | V |
| Voltage - Clamping (Max) @ Ipp | 118.65 | V |
| Current - Peak Pulse (10/1000µs) | 5.4 | A |
| Power - Peak Pulse | 600 | W |
| Operating Temperature Range | -55 to 150 | °C (TJ) |
| Mounting Type | Surface Mount | — |
| Package / Case | DO-214AA, SMB | — |
| RoHS Status | ROHS3 Compliant | — |
| Product Status | Obsolete | — |
Substitute Part Grouping Explanation
Substitution of the P6SMB82 is determined by the following critical electrical and mechanical parameters:
Primary Substitution Criteria:
- Unidirectional Zener TVS diode topology
- DO-214AA (SMB) surface-mount package
- Reverse standoff voltage within acceptable tolerance of 70.1V
- Peak pulse current rating of 5.4A minimum
- Peak pulse power rating of 600W
- Operating temperature range compatibility (-55°C to 150°C minimum)
- RoHS compliance status
Substitution Logic: The P6SMB82A (Eaton - Electronics Division) qualifies as a direct equivalent, maintaining identical reverse standoff voltage (70.1V), peak pulse current (5.4A), and power rating (600W) with only minor clamping voltage variation (113V vs. 118.65V). This part is active and available in production quantities.
Parts designated as manufacturer-recommended substitutes (SMBJ7.0A, P6SMB8.2A, SMBJ7.0A-TP, SMBJ7V0A, TV06B7V0J-HF) operate at significantly lower voltage ratings (7V reverse standoff, 12V clamping) with substantially higher peak pulse current capabilities (50-52A). These parts are suitable only for applications requiring lower voltage protection thresholds and are not interchangeable with the P6SMB82 in high-voltage protection circuits.
Parameter Comparison
| Parameter | P6SMB82 (Littelfuse) | P6SMB82A (Eaton) | SMBJ7.0A (MDD) | P6SMB8.2A (TSC) | SMBJ7.0A-TP (MCC) | SMBJ7V0A (Fairchild) | TV06B7V0J-HF (Comchip) |
|---|---|---|---|---|---|---|---|
| Voltage - Reverse Standoff (Typ) | 70.1V | 70.1V | 7V | 7.02V | 7V | 7V | 7V |
| Voltage - Breakdown (Min) | 73.8V | 77.9V | 7.78V | 7.79V | 7.78V | 7.78V | 7.78V |
| Voltage - Clamping (Max) @ Ipp | 118.65V | 113V | 12V | 12.1V | 12V | 12V | 12V |
| Current - Peak Pulse (10/1000µs) | 5.4A | 5.4A | 50A | 52A | 50A | 50A | 50A |
| Power - Peak Pulse | 600W | 600W | 600W | 600W | 600W | 600W | 600W |
| Operating Temperature Range | -55 to 150°C | -55 to 150°C | -50 to 150°C | -55 to 150°C | -55 to 175°C | -55 to 150°C | Not specified |
| Package / Case | DO-214AA, SMB | DO-214AA, SMB | DO-214AA, SMB | DO-214AA, SMB | DO-214AA, SMB | DO-214AA, SMB | DO-214AA, SMB |
| RoHS Status | ROHS3 Compliant | RoHS Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | Not specified | ROHS3 Compliant |
| Product Status | Obsolete | Active | Active | Active | Active | Active | Active |
Engineering Selection Recommendations
Direct Equivalent (Recommended for P6SMB82 Replacement):
P6SMB82A (Eaton - Electronics Division) is the primary substitute for the obsolete P6SMB82. This part maintains electrical equivalence with identical reverse standoff voltage (70.1V) and peak pulse current (5.4A), differing only in clamping voltage (113V vs. 118.65V), which remains within acceptable protection margins for high-voltage applications. The P6SMB82A is active in production, available in Tape & Reel packaging, and maintains RoHS compliance. Inventory availability is substantial (5,479 pieces).
Alternative High-Voltage Protection (Different Application Class):
The manufacturer-recommended substitutes (SMBJ7.0A, P6SMB8.2A, SMBJ7.0A-TP, SMBJ7V0A, TV06B7V0J-HF) are not equivalent to the P6SMB82 and operate in a different voltage protection class. These parts feature 7V reverse standoff voltage with 12V clamping voltage, suitable for low-voltage signal and logic protection circuits. Selection of these parts requires circuit redesign and is appropriate only when protecting lower-voltage systems.
Compliance Considerations:
All recommended substitutes maintain ROHS3 compliance status. The P6SMB82A and SMBJ7.0A-TP offer extended operating temperature ranges (-55°C to 150°C and -55°C to 175°C respectively), providing additional thermal margin for demanding applications.
Frequently Asked Questions (FAQ)
Q: Can I use SMBJ7.0A or P6SMB8.2A as a direct replacement for P6SMB82?
A: No. These parts operate at 7V reverse standoff voltage with 12V clamping voltage, compared to the P6SMB82's 70.1V standoff and 118.65V clamping. They are designed for low-voltage protection circuits and will not provide adequate protection in high-voltage applications. Substitution requires circuit redesign.
Q: What is the difference between P6SMB82 and P6SMB82A?
A: Both parts maintain the same reverse standoff voltage (70.1V) and peak pulse current (5.4A). The primary difference is clamping voltage: P6SMB82A clamps at 113V versus P6SMB82's 118.65V. The P6SMB82A is manufactured by Eaton and is currently active in production, whereas the P6SMB82 (Littelfuse) is obsolete. For high-voltage protection applications, this clamping voltage difference is acceptable.
Q: Are all substitute parts available in the same DO-214AA (SMB) package?
A: Yes. All listed substitute parts use the DO-214AA (SMB) surface-mount package, ensuring mechanical and footprint compatibility. Packaging format varies (Tape & Reel, Bulk, or unspecified), but the physical component package remains identical.
Q: Which substitute offers the best temperature performance?
A: SMBJ7.0A-TP (Micro Commercial Co) provides the widest operating temperature range at -55°C to 175°C, compared to the P6SMB82's -55°C to 150°C. However, this part operates at 7V voltage rating and is not a direct equivalent for high-voltage applications.
Q: Is P6SMB82A the only true equivalent for the obsolete P6SMB82?
A: Yes. P6SMB82A is the only substitute that maintains the critical electrical parameters (70.1V reverse standoff, 5.4A peak pulse current, 600W power rating) required for direct substitution in high-voltage protection circuits. All other listed parts operate at significantly lower voltage ratings and serve different application classes.
Q: What compliance certifications should I verify for production use?
A: All recommended substitutes maintain RoHS compliance. Verify REACH status with your supplier if required for your application. The P6SMB82A and SMBJ7.0A-TP both confirm REACH Unaffected status. All parts carry ECCN EAR99 classification and HTSUS code 8541.10.0080.
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