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P6SMB6.8CA Equivalent & Substitute Parts
Part Overview
The P6SMB6.8CA is a transient voltage suppressor (TVS) diode manufactured by Taiwan Semiconductor Corporation, designed for general-purpose overvoltage protection applications. This surface-mount component operates in the 5.8V reverse standoff voltage range with a 10.5V maximum clamping voltage and 60A peak pulse current capability. The device is classified as Active product status and is RoHS3 compliant with unlimited moisture sensitivity rating.
Equivalent and substitute parts are identified to address inventory availability, lead time constraints, or specific application requirements while maintaining electrical and mechanical compatibility within the P6SMB6.8 voltage class.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Reverse Standoff (Typ) | 5.8 | V |
| Voltage - Breakdown (Min) | 6.45-6.46 | V |
| Voltage - Clamping (Max) @ Ipp | 10.5 | V |
| Current - Peak Pulse (10/1000µs) | 60 | A |
| Power - Peak Pulse | 600 | W |
| Operating Temperature Range | -55 to 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
Substitute parts for the P6SMB6.8CA are classified into two categories based on electrical parameter alignment:
Upgrade Substitutes (Direct Equivalents): Parts that maintain identical voltage specifications (5.8V reverse standoff, 10.5V clamping) with equivalent or superior peak pulse current ratings. These parts are interchangeable at the circuit level and share the same base product number (P6SMB6.8). Upgrade substitutes include P6SMB6.8CA-E3/52 and P6SMB6.8CA-E3/5B from Vishay General Semiconductor.
Similar Substitutes (Functional Alternatives): Parts that operate within the same voltage class but may exhibit different peak pulse current characteristics or clamping voltages. These parts are suitable for applications where the primary voltage protection threshold is the critical parameter. Similar substitutes include SM6T6V8CA, SM6T6V8CA-E3/52, SM6T6V8CA-E3/5B, SM6T6V8CAY from STMicroelectronics and Vishay, SMBJP6KE6.8CA-TP from Micro Commercial Co, and P6SMB62CA from Eaton.
Substitution eligibility is determined by:
- Voltage - Reverse Standoff (Typ): 5.8V
- Voltage - Clamping (Max) @ Ipp: 10.5V or higher
- Package / Case: DO-214AA, SMB
- Mounting Type: Surface Mount
- Type: Zener, Bidirectional
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Voltage - Reverse Standoff (Typ) [V] | Voltage - Breakdown (Min) [V] | Voltage - Clamping (Max) @ Ipp [V] | Current - Peak Pulse (10/1000µs) [A] | Power - Peak Pulse [W] | Operating Temperature [°C] | Package / Case | Product Status |
|---|---|---|---|---|---|---|---|---|---|
| P6SMB6.8CA | Taiwan Semiconductor Corporation | 5.8 | 6.46 | 10.5 | 60 | 600 | -55 to 150 | DO-214AA, SMB | Active |
| P6SMB6.8CA-E3/52 | Vishay General Semiconductor - Diodes Division | 5.8 | 6.45 | 10.5 | 57.1 | 600 | -65 to 150 | DO-214AA, SMB | Active |
| P6SMB6.8CA-E3/5B | Vishay General Semiconductor - Diodes Division | 5.8 | 6.45 | 10.5 | 57.1 | 600 | -65 to 150 | DO-214AA, SMB | Active |
| SM6T6V8CA | STMicroelectronics | 5.8 | 6.45 | 13.4 | 298 (8/20µs) | 600 | -55 to 150 | DO-214AA, SMB | Active |
| SM6T6V8CA-E3/52 | Vishay General Semiconductor - Diodes Division | 5.8 | 6.45 | 10.5 | 57 | 600 | -65 to 150 | DO-214AA, SMB | Active |
| SM6T6V8CA-E3/5B | Vishay General Semiconductor - Diodes Division | 5.8 | 6.45 | 10.5 | 57 | 600 | -65 to 150 | DO-214AA, SMB | Active |
| SM6T6V8CAY | STMicroelectronics | 5.8 | 6.45 | 13.4 | 298 (8/20µs) | 600 | -55 to 150 | DO-214AA, SMB | Active |
| SMBJP6KE6.8CA-TP | Micro Commercial Co | 5.8 | 6.45 | 10.5 | 58.1 | 600 | -55 to 175 | DO-214AA, SMB | Active |
| P6SMB62CA | Eaton - Electronics Division | 53 | 58.9 | 85 | 7.2 | 600 | -55 to 150 | DO-214AA, SMB | Active |
Engineering Selection Recommendations
Direct Upgrade Substitutes: P6SMB6.8CA-E3/52 and P6SMB6.8CA-E3/5B from Vishay General Semiconductor are qualified direct substitutes. Both maintain identical voltage specifications (5.8V reverse standoff, 10.5V clamping) with peak pulse current ratings of 57.1A, which is within acceptable tolerance of the original 60A specification. Both parts are RoHS3 compliant and carry Active product status. The extended operating temperature range (-65°C to 150°C versus -55°C to 150°C) provides additional thermal margin. These parts are suitable for one-to-one replacement without circuit redesign.
Functional Alternatives with Enhanced Performance: SM6T6V8CA and SM6T6V8CAY from STMicroelectronics maintain the 5.8V reverse standoff voltage but feature a higher clamping voltage of 13.4V and significantly higher peak pulse current of 298A (8/20µs pulse). These parts provide superior transient suppression capability and are suitable for applications requiring enhanced protection margins. Both are RoHS3 compliant and Active status. SM6T6V8CAY carries AEC-Q101 automotive qualification.
Functional Alternatives with Equivalent Performance: SM6T6V8CA-E3/52 and SM6T6V8CA-E3/5B from Vishay maintain identical voltage specifications to the original part (5.8V reverse standoff, 10.5V clamping) with 57A peak pulse current. Both are RoHS3 compliant and Active status with extended temperature range (-65°C to 150°C).
Functional Alternative with Extended Temperature Range: SMBJP6KE6.8CA-TP from Micro Commercial Co maintains identical voltage specifications (5.8V reverse standoff, 10.5V clamping) with 58.1A peak pulse current and extended operating temperature range (-55°C to 175°C). This part is suitable for high-temperature applications. RoHS3 compliant and Active status.
Not Recommended for Direct Substitution: P6SMB62CA from Eaton operates at significantly different voltage levels (53V reverse standoff, 85V clamping) and is intended for telecom applications. This part is not suitable for circuits designed for the 5.8V/10.5V protection class.
Frequently Asked Questions (FAQ)
Q: Can P6SMB6.8CA-E3/52 and P6SMB6.8CA-E3/5B be used interchangeably with the original P6SMB6.8CA?
A: Yes. Both Vishay parts maintain identical voltage specifications (5.8V reverse standoff, 10.5V clamping) and equivalent peak pulse current ratings (57.1A versus 60A). The difference in packaging (Tape & Reel versus bulk) does not affect electrical performance. Both are RoHS3 compliant and Active status.
Q: What is the difference between SM6T6V8CA and P6SMB6.8CA?
A: Both parts share the same 5.8V reverse standoff voltage and 6.45V breakdown voltage. The primary differences are: (1) SM6T6V8CA has a higher clamping voltage of 13.4V versus 10.5V, (2) SM6T6V8CA has significantly higher peak pulse current of 298A (8/20µs) versus 60A (10/1000µs), and (3) SM6T6V8CA is manufactured by STMicroelectronics using the TRANSIL™ series designation. SM6T6V8CA provides enhanced transient suppression capability and is suitable for applications requiring higher current handling.
Q: Is P6SMB62CA a suitable substitute for P6SMB6.8CA?
A: No. P6SMB62CA operates at a fundamentally different voltage class (53V reverse standoff, 85V clamping) and is designed for telecom applications. It is not compatible with circuits designed for 5.8V/10.5V protection. Substitution would result in inadequate protection at the intended voltage threshold.
Q: What packaging options are available for equivalent parts?
A: The original P6SMB6.8CA is available in bulk packaging. Equivalent parts are available in multiple packaging formats: Tape & Reel (TR) for P6SMB6.8CA-E3/52 and P6SMB6.8CA-E3/5B, and Cut Tape (CT) & Digi-Reel® for SM6T6V8CA-E3/52, SM6T6V8CA-E3/5B, SM6T6V8CAY, and SMBJP6KE6.8CA-TP. All parts use the same DO-214AA (SMB) surface-mount package.
Q: Do all substitute parts meet RoHS3 compliance?
A: Yes. All listed substitute parts are RoHS3 compliant. All parts also carry REACH Unaffected status and EAR99 ECCN classification.
Q: Which substitute part has the widest operating temperature range?
A: SMBJP6KE6.8CA-TP from Micro Commercial Co operates from -55°C to 175°C, providing the widest temperature range. This part is suitable for high-temperature applications where the original -55°C to 150°C range is insufficient.
Q: Are there automotive-qualified alternatives?
A: Yes. SM6T6V8CAY from STMicroelectronics carries AEC-Q101 automotive qualification and is suitable for automotive applications requiring transient voltage suppression in the 5.8V/13.4V protection class.
Q: What is the significance of the different peak pulse current specifications?
A: Peak pulse current indicates the maximum transient current the TVS diode can suppress. The original P6SMB6.8CA handles 60A (10/1000µs pulse). Substitute parts with lower ratings (57-58A) are functionally equivalent for most applications. Parts with higher ratings (298A for STMicroelectronics SM6T series) provide enhanced protection margin for high-energy transient events. Selection depends on the specific transient energy profile of the application.
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