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P4SMA8.2A
NextGen Components
TVS Diode 400W 8.2V UNI SMA
300203 Pcs New Original In Stock
12.1V Clamp Ipp Tvs Diode Surface Mount DO-214AC, SMA
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5.0 / 5.0
- (358 Ratings)
P4SMA8.2A
Product Overview
2089984
DiGi Electronics Part Number
P4SMA8.2A-DGManufacturer
NextGen Components
P4SMA8.2A
Description
TVS Diode 400W 8.2V UNI SMAInventory
300203 Pcs New Original In Stock
12.1V Clamp Ipp Tvs Diode Surface Mount DO-214AC, SMA
Quantity
Minimum 1
Minimum 1
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P4SMA8.2A Technical Specifications
Category
Transient Voltage Suppressors (TVS), TVS Diodes
Packaging
Tape & Reel (TR)
Series
SMA
Product Status
Active
Type
Zener
Unidirectional Channels
1
Voltage - Reverse Standoff (Typ)
7.02V
Voltage - Breakdown (Min)
7.79V
Voltage - Clamping (Max) @ Ipp
12.1V
Power - Peak Pulse
400W
Power Line Protection
No
Applications
General Purpose
Operating Temperature
-50°C ~ 150°C (TJ)
Mounting Type
Surface Mount
Package / Case
DO-214AC, SMA
Supplier Device Package
DO-214AC, SMA
Datasheet & Documents
HTML Datasheet
P4SMA8.2A-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-P4SMA8.2ATR
Standard Package
5,000
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
Je suis très satisfait de leur service après-vente, toujours réactif et à l'écoute de mes besoins.
Dec 02, 2025
Die schnelle Lieferung begeistert mich immer wieder. Die Verpackung ist zuverlässig und hochwertig.
Dec 02, 2025
必要な時にすぐに商品が届き、品質も良く非常に安心して使えます。
Dec 02, 2025
Their packaging is not only environmentally friendly but also practical and secure.
Dec 02, 2025
Packaging was thorough and safe, giving me peace of mind about the integrity of my order.
Dec 02, 2025
The secure packaging minimizes concern about damage during transit.
Dec 02, 2025
My items arrived much sooner than I expected, beautifully packaged.
Dec 02, 2025
DiGi Electronics’ commitment to efficient logistics has greatly improved my project timelines.
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Frequently Asked Questions (FAQ)
What are the key design risks when using the P4SMA8.2A for transient protection in a 5V automotive sensor circuit?
Using the P4SMA8.2A in a 5V automotive system poses a risk of unintended clamping due to its 7.02V reverse standoff voltage, which is well above the normal operating voltage. This means the TVS will not protect against overvoltage events slightly above 5V, leaving downstream components vulnerable. Additionally, in load-dump or cold-crank scenarios, voltage transients may exceed 12.1V (clamping voltage), but ensure the connected ICs can tolerate this peak during clamping. Always verify compatibility with your microcontroller or sensor's maximum input voltage and consider a lower standoff voltage TVS like the SMBJ5.0A if tighter protection is needed near 5V operation with the P4SMA8.2A reserved for higher-voltage rail protection.
Can the P4SMA8.2A replace a SMAJ8.2A in an existing industrial control design, and what layout considerations are critical?
Yes, the P4SMA8.2A can generally replace the SMAJ8.2A as both are unidirectional 8.2V-rated TVS diodes in DO-214AC (SMA) package with similar clamping characteristics. However, verify the exact clamping performance under expected surge currents (e.g., IEC 61000-4-5) since P4SMA series may have slightly different dynamic resistance. Ensure PCB layout includes short, direct traces to ground and minimal loop area to prevent inductive ringing during fast transients. Avoid daisy-chaining ground connections—use a dedicated ground plane and place the P4SMA8.2A as close as possible to the entry point of the protected line to maximize effectiveness.
How reliable is the P4SMA8.2A in high-temperature environments like engine compartments, and what derating should be applied?
The P4SMA8.2A is rated for junction temperatures up to 150°C, making it suitable for under-hood automotive applications. However, at elevated ambient temperatures (e.g., >100°C), thermal derating is critical—pulse power handling drops significantly as temperature increases. For reliable long-term performance, limit peak pulse power to ≤70% of 400W (i.e., 280W) at 125°C ambient with poor airflow. Use thermal vias under the cathode pad to improve heat dissipation and consider intermittent surge duty cycles rather than continuous exposure to high-energy transients to avoid accelerated degradation or thermal runaway.
What are the failure modes of the P4SMA8.2A under repetitive ESD strikes, and how can I detect end-of-life in field applications?
The P4SMA8.2A typically fails short-circuit after repeated ESD or surge events exceeding its rated Ipp (33.1A at 12.1V). While robust for transient suppression, ongoing exposure to sub-clamping-level but frequent transients can lead to parametric drift—increased leakage current or reduced breakdown voltage. In field designs, incorporate upstream current sensing or fuse monitoring to detect abnormal leakage paths. No visible signs pre-failure are expected; therefore, if operating in high ESD zones (e.g., industrial I/O), pair the P4SMA8.2A with a series resistor or fuse and implement periodic maintenance checks on protection circuits, especially in safety-critical systems.
When selecting between P4SMA8.2A and SP3SMAJ8.2A for portable medical devices, what EMI and leakage trade-offs should be considered?
Both the P4SMA8.2A and SP3SMAJ8.2A offer 8.2V standoff and SMA packaging, but the SP3 series typically includes enhanced EMI filtering. The P4SMA8.2A has no integrated filtering, so it may allow high-frequency noise through during clamping, risking interference in sensitive analog or RF stages in medical devices. Additionally, the P4SMA8.2A’s Zener-type leakage (typically <1µA at room temp) can increase with age and voltage stress, potentially affecting low-power sensor circuits. For portable medical equipment requiring low EMI and ultra-low leakage, prefer SP3SMAJ8.2A or add external filtering; otherwise, the P4SMA8.2A is acceptable for general-purpose protection on digital lines with proper layout isolation.
Quality Assurance (QC)
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.
P4SMA8.2A CAD Models
NextGen Components P4SMA8.2A PCB symbols & footprints
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