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P6SMB350 Equivalent & Substitute Parts
Part Overview
The P6SMB350 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component features a 300V reverse standoff voltage, 506.1V maximum clamping voltage, and 600W peak pulse power rating in a DO-214AA (SMB) package. The part is currently listed as obsolete, making equivalent substitutes necessary for ongoing design support and procurement.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Reverse Standoff Voltage (Typ) | 300V |
| Breakdown Voltage (Min) | 315V |
| Clamping Voltage (Max) @ Ipp | 506.1V |
| Peak Pulse Current (10/1000µs) | 1.3A |
| Peak Pulse Power | 600W |
| Package Type | DO-214AA (SMB) |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -55°C to 150°C (TJ) |
| Diode Type | Zener, Unidirectional |
Substitute Part Grouping Explanation
Substitution eligibility for the P6SMB350 is determined by the following critical parameters:
- Reverse Standoff Voltage: Must be 300V (Typ)
- Peak Pulse Power: Must be 600W
- Package Type: Must be DO-214AA (SMB) surface mount
- Diode Configuration: Must be unidirectional Zener type
- Peak Pulse Current: Must support 1.3A minimum
- Clamping Voltage Range: Must fall within acceptable operating limits (480V–510V @ Ipp)
All substitute parts listed below meet these core electrical and mechanical requirements. Variations in breakdown voltage (315V–335V minimum) and clamping voltage (482V–486V maximum) remain within the functional tolerance band for this application category.
Parameter Comparison
| Part Number | Manufacturer | Standoff Voltage (V) | Breakdown Min (V) | Clamp Max @ Ipp (V) | Peak Pulse Current (A) | Peak Power (W) | Package | Status |
|---|---|---|---|---|---|---|---|---|
| P6SMB350 | Littelfuse Inc. | 300 | 315 | 506.1 | 1.3 | 600 | DO-214AA (SMB) | Obsolete |
| P6SMB350A | Eaton - Electronics Division | 300 | 332 | 482 | 1.3 | 600 | DO-214AA (SMB) | Active |
| SMBJ300A | Good-Ark Semiconductor | 300 | 335 | 486 | 1.3 | 600 | DO-214AA (SMB) | Active |
| SMBJP6KE350A-TP | Micro Commercial Co | 300 | 332 | 482 | 1.3 | 600 | DO-214AA (SMB) | Active |
| TV06B301J-HF | Comchip Technology | 300 | 335 | 486 | 1.23 | 600 | DO-214AA (SMB) | Active |
Engineering Selection Recommendations
All listed substitute parts are active production components with full availability, addressing the obsolescence status of the original P6SMB350. Selection among these alternatives should be based on the following factors:
P6SMB350A (Eaton) and SMBJP6KE350A-TP (Micro Commercial Co) are direct functional equivalents with identical electrical specifications (482V clamping, 332V minimum breakdown). Both are RoHS3 compliant and available in standard packaging formats (Cut Tape/Digi-Reel and Tape & Reel respectively).
SMBJ300A (Good-Ark Semiconductor) provides equivalent performance with 486V clamping voltage and is RoHS3 compliant. This part is suitable for applications where Good-Ark supply chain integration is preferred.
TV06B301J-HF (Comchip Technology) operates within specification with 486V clamping and 1.23A peak pulse current. This part supports an extended operating temperature range up to 175°C (where specified by the manufacturer) and is RoHS3 compliant.
All substitute parts maintain the 300V reverse standoff voltage, 600W peak pulse power, and DO-214AA (SMB) package configuration required for direct board-level replacement.
Frequently Asked Questions (FAQ)
Q: Can P6SMB350A be used as a direct replacement for P6SMB350?
A: Yes. Both parts share identical reverse standoff voltage (300V), peak pulse power (600W), peak pulse current (1.3A), and DO-214AA (SMB) package type. The clamping voltage difference (482V vs. 506.1V) remains within acceptable operating tolerance for this application category.
Q: What is the difference between the substitute parts?
A: All substitute parts meet the core electrical requirements (300V standoff, 600W power, 1.3A current, SMB package). Variations exist in clamping voltage (482V–486V) and manufacturer. Selection depends on supply chain availability, packaging preference (Cut Tape vs. Tape & Reel), and compliance certifications required by your application.
Q: Are all substitute parts RoHS compliant?
A: Yes. All listed substitute parts are RoHS3 compliant. P6SMB350A and SMBJP6KE350A-TP also carry REACH Unaffected status.
Q: Does package type differ among substitutes?
A: All substitute parts use the DO-214AA (SMB) surface-mount package. Packaging format (Cut Tape, Digi-Reel, or Tape & Reel) varies by supplier but does not affect electrical performance or board-level compatibility.
Q: What is the moisture sensitivity level for these parts?
A: All parts, including the original P6SMB350 and all substitutes, have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.
Q: Can TV06B301J-HF be used if the operating temperature range is critical?
A: TV06B301J-HF supports operation up to 175°C (TJ), exceeding the original P6SMB350 specification of 150°C. This part is suitable for applications requiring extended temperature performance. Other substitutes are rated to 150°C.
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