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P6SMB10AT3G Equivalent & Substitute Parts
Part Overview
The P6SMB10AT3G is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc. in the DO-214AA (SMB) package. This component is rated for 8.55V reverse standoff voltage with a 14.5V maximum clamping voltage and 41A peak pulse current. 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 |
|---|---|
| Voltage - Reverse Standoff (Typ) | 8.55V |
| Voltage - Breakdown (Min) | 9.5V |
| Voltage - Clamping (Max) @ Ipp | 14.5V |
| Current - Peak Pulse (10/1000µs) | 41A |
| Power - Peak Pulse | 600W |
| Operating Temperature Range | -65°C ~ 150°C (TJ) |
| Package / Case | DO-214AA, SMB |
| Type | Zener, Unidirectional |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution eligibility for the P6SMB10AT3G is determined by the following critical parameters:
- Voltage - Reverse Standoff (Typ): 8.5V to 8.55V
- Voltage - Clamping (Max) @ Ipp: 14.4V to 14.5V
- Current - Peak Pulse (10/1000µs): Minimum 41A
- Package / Case: DO-214AA or SMB equivalent
- Operating Temperature: Minimum -55°C to 150°C
- RoHS Compliance: ROHS3 or equivalent
Substitute parts are grouped into two categories:
Category A - Direct Electrical Equivalents: Parts with identical or tighter voltage specifications (8.5V–8.55V standoff, 14.4V–14.5V clamping) and peak pulse current ratings of 41A or higher. These parts maintain the same functional performance envelope.
Category B - Enhanced Performance Alternatives: Parts with higher peak pulse current ratings (69A) or higher clamping voltages (18.6V) that provide superior transient suppression capability while maintaining compatible standoff voltage ranges.
Parameter Comparison
| Part Number | Manufacturer | Standoff Voltage (Typ) | Clamping Voltage (Max) | Peak Pulse Current | Power - Peak Pulse | Operating Temp Range | Package | Status |
|---|---|---|---|---|---|---|---|---|
| P6SMB10AT3G | Littelfuse Inc. | 8.55V | 14.5V | 41A | 600W | -65°C ~ 150°C | DO-214AA (SMB) | Obsolete |
| 1KSMB10A | Taiwan Semiconductor Corporation | 8.55V | 14.5V | 69A | 1000W | -55°C ~ 175°C | DO-214AA (SMB) | Active |
| P6SMB10A | Eaton - Electronics Division | 8.55V | 14.5V | 42.1A | 600W | -55°C ~ 150°C | DO-214AA (SMB) | Active |
| SMBJ8.5A-HR | Littelfuse Inc. | 8.5V | 14.4V | 41.7A | 600W | -65°C ~ 150°C | DO-214AA (SMBJ) | Active |
| SMBJ8.5A-HRA | Littelfuse | 8.5V | 14.4V | 41.7A | 600W | -65°C ~ 150°C | DO-214AA (SMBJ) | Active |
| SM6T10A-E3/5B | Vishay General Semiconductor - Diodes Division | 8.55V | 14.5V | 41A | 600W | -65°C ~ 150°C | DO-214AA (SMBJ) | Active |
| P6SMB10A-E3/52 | Vishay General Semiconductor - Diodes Division | 8.55V | 14.5V | 41.4A | 600W | -65°C ~ 150°C | DO-214AA (SMBJ) | Active |
| P6SMB10A-M3/52 | Vishay General Semiconductor - Diodes Division | 8.55V | 14.5V | 41.4A | 600W | -65°C ~ 150°C | DO-214AA (SMBJ) | Active |
| P6SMB10A-M3/5B | Vishay General Semiconductor - Diodes Division | 8.55V | 14.5V | 41.4A | 600W | -65°C ~ 150°C | DO-214AA (SMBJ) | Active |
| SM6T10A | STMicroelectronics | 8.55V | 18.6V | 215A (8/20µs) | 600W | -55°C ~ 150°C | DO-214AA (SMB) | Active |
Engineering Selection Recommendations
Primary Substitutes (Direct Equivalents):
SM6T10A-E3/5B, P6SMB10A-E3/52, P6SMB10A-M3/52, and P6SMB10A-M3/5B are direct electrical equivalents with identical voltage specifications (8.55V standoff, 14.5V clamping) and comparable peak pulse current ratings (41–41.4A). All are ROHS3 compliant and active products. These parts are suitable for direct replacement in existing designs without circuit modification.
P6SMB10A (Eaton) and SMBJ8.5A-HR / SMBJ8.5A-HRA (Littelfuse) are functionally equivalent with minor voltage variations within acceptable tolerance (8.5V–8.55V standoff, 14.4V–14.5V clamping). All maintain 600W peak pulse power and are ROHS3 compliant active products.
Enhanced Performance Alternative:
1KSMB10A (Taiwan Semiconductor Corporation) provides superior transient suppression with 69A peak pulse current and 1000W peak pulse power while maintaining the same 8.55V standoff and 14.5V clamping voltages. This part is suitable for applications requiring higher surge current handling. Operating temperature range extends to 175°C.
Higher Clamping Voltage Alternative:
SM6T10A (STMicroelectronics) offers significantly higher peak pulse current (215A at 8/20µs) and elevated clamping voltage (18.6V). This part is suitable only for applications where higher clamping voltage is acceptable and enhanced surge protection is required.
All recommended substitutes are active products with current manufacturing status and ROHS3 compliance, ensuring long-term availability and regulatory compliance.
Frequently Asked Questions (FAQ)
Q: Can I use 1KSMB10A as a direct replacement for P6SMB10AT3G?
A: Yes. The 1KSMB10A maintains identical standoff voltage (8.55V) and clamping voltage (14.5V) specifications. The higher peak pulse current (69A vs. 41A) and power rating (1000W vs. 600W) provide enhanced protection without affecting circuit compatibility. Operating temperature range extends to 175°C, which is superior to the original part's 150°C maximum.
Q: What is the difference between SMBJ8.5A-HR and SMBJ8.5A-HRA?
A: Both parts are electrically identical with 8.5V standoff voltage, 14.4V clamping voltage, and 41.7A peak pulse current. The difference is in packaging designation and manufacturer lot tracking. Both are suitable substitutes for the P6SMB10AT3G.
Q: Can I use SM6T10A (STMicroelectronics) instead of the original part?
A: SM6T10A is electrically compatible in terms of standoff voltage (8.55V) but has a higher clamping voltage (18.6V vs. 14.5V) and significantly higher peak pulse current (215A). Use this part only if your circuit design can tolerate the higher clamping voltage. The elevated clamping voltage may affect voltage regulation in sensitive applications.
Q: Are all substitute parts available in the same package?
A: All substitute parts use the DO-214AA (SMB or SMBJ variant) package, which is mechanically and electrically compatible. Packaging designations (SMB vs. SMBJ) refer to manufacturer-specific labeling but represent the same physical form factor. Verify PCB footprint compatibility with your design documentation.
Q: Which substitute offers the best long-term availability?
A: P6SMB10A (Eaton), P6SMB10A-E3/52, P6SMB10A-M3/52, and P6SMB10A-M3/5B are all active products from established manufacturers with high inventory levels (685–9100 units). These parts are recommended for new designs requiring assured supply chain continuity.
Q: Do all substitutes meet RoHS compliance requirements?
A: Yes. All recommended substitute parts are ROHS3 compliant, meeting current environmental and regulatory standards equivalent to the original P6SMB10AT3G specification.
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