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P4SMA550CA
NextGen Components
TVS Diode 400W 550V BI SMA
3399 Pcs New Original In Stock
760V Clamp Ipp Tvs Diode Surface Mount DO-214AC, SMA
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5.0 / 5.0
- (447 Ratings)
P4SMA550CA
Product Overview
2053535
DiGi Electronics Part Number
P4SMA550CA-DGManufacturer
NextGen Components
P4SMA550CA
Description
TVS Diode 400W 550V BI SMAInventory
3399 Pcs New Original In Stock
760V Clamp Ipp Tvs Diode Surface Mount DO-214AC, SMA
Quantity
Minimum 1
Minimum 1
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P4SMA550CA Technical Specifications
Category
Transient Voltage Suppressors (TVS), TVS Diodes
Packaging
-
Series
SMA
Product Status
Active
Type
Zener
Bidirectional Channels
1
Voltage - Reverse Standoff (Typ)
468V
Voltage - Breakdown (Min)
522.5V
Voltage - Clamping (Max) @ Ipp
760V
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
P4SMA550CA-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-P4SMA550CATR
Standard Package
5,000
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
包装の質が高く、開封したときに商品への信頼感が持てました。
Dec 02, 2025
Their inventory control is superb, enabling efficient order processing.
Dec 02, 2025
Customer support was highly responsive and very attentive to my needs after purchase.
Dec 02, 2025
The speed of delivery was outstanding, arriving just a couple of days after purchase.
Dec 02, 2025
Every visit to DiGi Electronics reinforces my confidence in their reliable product quality.
Dec 02, 2025
DiGi Electronics consistently delivers both fast and durable solutions for my projects.
Dec 02, 2025
Their products have proven reliable over time, offering excellent value for the price.
Dec 02, 2025
Fast logistics and clear pricing make DiGi Electronics a preferred supplier in our industry.
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Frequently Asked Questions (FAQ)
When designing in the P4SMA550CA, what are the key risks if my circuit's normal operating voltage is close to the 468V reverse standoff rating?
When using the P4SMA550CA, operating consistently near the 468V reverse standoff voltage increases the risk of leakage current rise and potential premature breakdown due to voltage transients or temperature effects. For reliable design-in, maintain a 10–15% safety margin below the standoff voltage. In high-temperature environments above 85°C, derate further to avoid accelerated aging or unwanted clamping. Consider system-level overvoltage tolerance and transient immunity to ensure the P4SMA550CA only activates during actual surge events, not during normal operation peaks.
Can the P4SMA550CA replace the SMAJ550A in an existing 400W surge protection circuit, and what design-in considerations should I verify?
Yes, the P4SMA550CA can serve as a functional replacement for the SMAJ550A, both being 400W bidirectional SMA TVS diodes with similar voltage ratings. However, verify that the P4SMA550CA’s 760V max clamping voltage under Ipp is acceptable in your circuit—higher than some SMAJ variants—to ensure downstream components aren’t stressed during clamping. Also confirm PCB layout thermal relief and trace width support for surge currents. Since both are RoHS-compliant and MSL1, no manufacturing changes are needed. Always validate under actual EFT or surge testing to ensure equivalent system-level performance.
How does the P4SMA550CA perform in high-temperature industrial environments up to 125°C ambient, and what derating rules apply?
The P4SMA550CA is rated for junction temperatures up to 150°C, but its peak pulse power capability must be derated above 25°C. At 125°C ambient, expect a 50–70% reduction in sustainable surge energy depending on PCB heat dissipation. To ensure reliability, use the P4SMA550CA with generous copper pads (≥100 mm²) for thermal conduction and avoid enclosing it in low-airflow areas. In high-temp designs, consider doubling the expected surge life by selecting a higher voltage TVS or using parallel P4SMA550CA devices if repetitive surges are expected.
What are the risks of using the P4SMA550CA for power line transient protection when it's listed as 'no' for power line protection?
Although the P4SMA550CA can clamp high-energy transients, it’s not recommended for direct AC power line protection due to its 400W peak pulse limit and lack of sustained overvoltage endurance. Mains-related faults like prolonged overvoltage or follow-on current may cause thermal runaway. Use the P4SMA550CA only for secondary protection downstream of primary safeguards (like MOVs or fuses) in low-energy, general-purpose signal or DC power rails up to 468V. For primary AC line use, choose devices specifically rated for power line protection with higher endurance, such as the 1.5KE series.
In what scenarios should I avoid using the P4SMA550CA despite its high 760V clamping voltage, and what’s a safer alternative?
Avoid using the P4SMA550CA in circuits where downstream ICs have maximum voltage ratings below 800V, as the 760V clamping level—even briefly—can damage sensitive components. This is a common issue in mixed-voltage industrial control systems. Instead, consider a lower-clamping alternative like the P4SMA520CA (720V max clamp) or use a hybrid protection network with a series resistor or inductor to limit let-through voltage. Always model the clamping behavior under 8/20μs surge conditions to ensure the P4SMA550CA’s performance aligns with your circuit’s withstand requirements.
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.
P4SMA550CA CAD Models
NextGen Components P4SMA550CA PCB symbols & footprints
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