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P6SMB300A
NextGen Components
TVS Diode 600W 300V UNI SMB
74039 Pcs New Original In Stock
414V Clamp Ipp Tvs Diode Surface Mount SMB (DO-214AA)
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P6SMB300A
Product Overview
2056747
DiGi Electronics Part Number
P6SMB300A-DGManufacturer
NextGen Components
P6SMB300A
Description
TVS Diode 600W 300V UNI SMBInventory
74039 Pcs New Original In Stock
414V Clamp Ipp Tvs Diode Surface Mount SMB (DO-214AA)
Quantity
Minimum 1
Minimum 1
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P6SMB300A Technical Specifications
Category
Transient Voltage Suppressors (TVS), TVS Diodes
Packaging
Tape & Reel (TR)
Series
SMB
Product Status
Active
Type
Zener
Unidirectional Channels
1
Voltage - Reverse Standoff (Typ)
256V
Voltage - Breakdown (Min)
285V
Voltage - Clamping (Max) @ Ipp
414V
Power - Peak Pulse
600W
Power Line Protection
No
Applications
General Purpose
Operating Temperature
-65°C ~ 150°C (TJ)
Mounting Type
Surface Mount
Package / Case
DO-214AA, SMB
Supplier Device Package
SMB (DO-214AA)
Datasheet & Documents
HTML Datasheet
P6SMB300A-DG
Environmental & Export Classification
RoHS Status
RoHS Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8541.10.0080
Additional Information
Other Names
3372-P6SMB300ATR
Standard Package
6,000
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
Fast and efficient order handling from DiGi Electronics is vital for our operational success.
Dec 02, 2025
Their quick and reliable after-sales support makes them my go-to electronics distributor.
Dec 02, 2025
All items I've received from DiGi Electronics have shown excellent craftsmanship and finish.
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Frequently Asked Questions (FAQ)
Can the P6SMB300A replace a 1.5KE300A in a 240V AC input protection circuit, and what are the key trade-offs in clamping performance and board space?
The P6SMB300A can serve as a functional replacement for the 1.5KE300A in certain 240V AC input applications, but with important caveats. While both have a similar reverse standoff voltage (~256V vs. ~267V), the P6SMB300A has a lower peak pulse power rating (600W vs. 1500W) and a higher clamping voltage (414V vs. ~380V at 10A). This means it offers less surge energy absorption and may allow higher transient voltages to reach downstream components. Additionally, the P6SMB300A in SMB (DO-214AA) package is smaller than the 1.5KE300A’s DO-201AD axial package, saving board space but requiring careful thermal management. Use only if surge energy levels are within 600W and downstream circuitry can tolerate 414V clamping; otherwise, consider upgrading to a higher-power TVS like the SMCJ300A.
What are the risks of using the P6SMB300A for protecting a 28V industrial sensor line powered from a long cable run exposed to lightning-induced transients?
Using the P6SMB300A on a 28V sensor line with long cable exposure presents significant reliability risks. Although its 256V reverse standoff is well above 28V, the device is unidirectional and optimized for high-voltage transients—not low-voltage precision circuits. The 285V minimum breakdown voltage leaves no margin for normal voltage swings, risking unintended conduction during minor surges or aging. More critically, its 414V clamping voltage may exceed the absolute maximum rating of typical 30V-rated sensor ICs. For this scenario, a bidirectional, low-capacitance TVS like the SMAJ33A (33V standoff, 53.3V clamp) or a dedicated low-voltage protector such as the TPD4E05U06 is far safer and more appropriate.
How does the P6SMB300A compare to the Littelfuse SMAJ300A in terms of surge handling, thermal performance, and long-term reliability in outdoor telecom power supplies?
The P6SMB300A and Littelfuse SMAJ300A are both 600W TVS diodes in SMB packages with nearly identical electrical specs (256V standoff, ~414V clamp), but reliability and surge robustness differ due to internal construction. The SMAJ300A typically undergoes more rigorous qualification testing (e.g., MIL-STD-750) and has a proven track record in harsh environments like outdoor telecom enclosures. The P6SMB300A, while RoHS-compliant and MSL-1, lacks published HBM/CDM ESD ratings and long-term field data. In high-reliability applications, the SMAJ300A is preferred; however, the P6SMB300A may be acceptable in cost-sensitive designs with controlled environments, provided surge testing validates performance under expected transient profiles (e.g., IEC 61000-4-5).
Is it safe to parallel two P6SMB300A diodes to increase surge current capability in a 48V DC bus protection scheme, and what layout considerations are critical?
Paralleling two P6SMB300A diodes to boost surge current handling is not recommended due to inherent manufacturing tolerances in breakdown voltage (±5% typical). Even small mismatches can cause one diode to conduct significantly more current during a transient, leading to thermal runaway and premature failure. If higher surge capability is needed, select a single higher-power device like the SMCJ300A (1500W) or 5KP300A (5000W). If paralleling is unavoidable, ensure symmetrical PCB layout with matched trace lengths, place both devices adjacent to each other, and consider adding small series resistors (0.1–0.5Ω, 1W) to balance current—though this reduces effective clamping speed. Always validate with actual surge testing.
What derating guidelines should I follow when using the P6SMB300A in a high-temperature industrial environment operating continuously at 125°C junction temperature?
Although the P6SMB300A is rated for operation up to 150°C junction temperature, continuous operation at 125°C significantly reduces long-term reliability and surge lifetime. At elevated temperatures, the diode’s leakage current increases exponentially, and thermal stress accelerates metallization wear-out. For sustained high-temp use, derate the peak pulse power by at least 30–40% compared to 25°C ratings—meaning treat it as a ~360–420W device. Ensure adequate copper pour under the SMB pad for heat spreading, avoid adjacent heat sources, and consider periodic thermal cycling tests. For mission-critical systems above 100°C, evaluate alternatives with enhanced thermal designs, such as the Vishay 5KP-series or Bourns CDSOT23-T300, which offer better high-temp surge endurance.
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DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
P6SMB300A CAD Models
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