Counterfeit and defect prevention
Visual and packaging inspection
Electrical performance verification
Service Email:
[email protected]
>
P4SMA540CA
NextGen Components
TVS Diode 400W 540V BI SMA
18133 Pcs New Original In Stock
740V Clamp Ipp Tvs Diode Surface Mount DO-214AC, SMA
Request Quote
(Ships tomorrow)
*Quantity
Minimum 1
Minimum 1
5.0 / 5.0
- (321 Ratings)
P4SMA540CA
Product Overview
2053197
DiGi Electronics Part Number
P4SMA540CA-DGManufacturer
NextGen Components
P4SMA540CA
Description
TVS Diode 400W 540V BI SMAInventory
18133 Pcs New Original In Stock
740V Clamp Ipp Tvs Diode Surface Mount DO-214AC, SMA
Quantity
Minimum 1
Minimum 1
Purchase and inquiry
Warranty & Returns
How to Order
Shipping & Delivery
Quality Assurance
365 - Day Quality Guarantee - Every part fully backed.
90 - Day Refund or Exchange - Defective parts? No hassle.
Limited Stock, Order Now - Get reliable parts without worry.
Global Shipping & Secure Packaging
Worldwide Delivery in 3-5 Business Days
100% ESD Anti-Static Packaging
Real-Time Tracking for Every Order
Secure & Flexible Payment
Credit Card, VISA, MasterCard, PayPal, Western Union, Telegraphic Transfer(T/T) and more
All payments encrypted for security
P4SMA540CA Technical Specifications
Category
Transient Voltage Suppressors (TVS), TVS Diodes
Packaging
-
Series
SMA
Product Status
Active
Type
Zener
Bidirectional Channels
1
Voltage - Reverse Standoff (Typ)
460V
Voltage - Breakdown (Min)
513V
Voltage - Clamping (Max) @ Ipp
740V
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
P4SMA540CA-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-P4SMA540CATR
Standard Package
5,000
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
Je n'ai rien à redire, la qualité est au rendez-vous et le service est parfait.
Dec 02, 2025
La livraison express de DiGi Electronics m'a permis d'obtenir ce dont j'avais besoin en un rien de temps.
Dec 02, 2025
The packaging was professional and robust, ensuring safety during delivery.
Dec 02, 2025
I've tested their components under harsh conditions, and they remained intact, showcasing excellent material quality and durability.
Dec 02, 2025
The shipping process from order to receipt is impressively fast, often within just a day or two.
Dec 02, 2025
Their commitment to quality is consistent and dependable.
Dec 02, 2025
They have built a reputation for dependable solutions and excellent customer care.
Publish Evalution
Evalution Message
Please enter your review message.
Please post honest comments and do not post ilegal comments.
Frequently Asked Questions (FAQ)
When designing in the P4SMA540CA, how can I ensure it won’t activate during normal circuit operation under voltage transients in a 400V AC line monitoring application?
The P4SMA540CA has a minimum breakdown voltage of 513V, which provides a critical safety margin above the peak voltage of a 400V AC line (approximately 566V peak). However, in practice, voltage swells or harmonics can push the peak voltage close to or beyond this threshold. To avoid nuisance triggering, verify your system’s maximum expected transient duration and ensure it falls below the TVS’s response time (typically <1ns). Additionally, consider using a series resistor to limit leakage and avoid false clamping during fast-rising but non-destructive events. Monitor junction temperature effects—since the P4SMA540CA’s breakdown voltage has a positive temperature coefficient, prolonged operation near limits can increase activation risk. Use thermal design best practices to keep TJ below 125°C in sustained conditions.
Can the P4SMA540CA be used as a direct replacement for the SMAJ530CA in a bidirectional protection circuit, and what design risks should I evaluate?
While both the P4SMA540CA and SMAJ530CA are bidirectional 400W SMA TVS diodes used in general-purpose protection, key differences impact interchangeability. The P4SMA540CA has a higher standoff voltage (460V vs. 450V) and slightly higher clamping voltage (740V vs. 730V), which may affect downstream component stress. More critically, validate leakage current at your maximum operating temperature—some SMAJ-series parts exhibit higher leakage near end-of-life under repeated surge conditions. The P4SMA540CA’s tighter production control and RoHS compliance reduce long-term reliability risks in high-humidity environments. Always simulate the let-through energy in your specific circuit and confirm the P4SMA540CA’s clamping level doesn’t exceed the withstand rating of protected ICs.
What are the PCB layout best practices to maximize surge current handling and thermal dissipation with the P4SMA540CA in an industrial control system?
To ensure reliable operation of the P4SMA540CA during high-energy transients, design the PCB layout with short, wide traces (minimum 15 mils, preferably 25+) from the TVS to protected nodes and ground. Avoid vias in high-current paths to reduce impedance during fast ESD or surge events. Use thermal relief only on inner layers; solid copper connections on outer layers improve heat spreading. Place the P4SMA540CA as close as possible to the entry point of transient threats (e.g., connectors). For sustained surge environments, consider adding a fuse or PTC in series to limit sustained overcurrent. The DO-214AC (SMA) package has limited thermal mass, so avoid placing near other heat-generating components to prevent TJ from exceeding 150°C under repetitive pulsing.
How does the clamping performance of the P4SMA540CA degrade after multiple IEC 61000-4-5 surge events, and how can I ensure long-term reliability?
The P4SMA540CA is rated for 400W peak pulse power, but repetitive exposure to high-energy surges (e.g., 10/1000μs waveform) can lead to cumulative degradation, especially if pulses exceed 80% of the device’s rated Ipp (approximately 0.54A at 740V). Post-stress leakage current is a key failure indicator—monitor for increases above 1μA at room temperature. To extend life, derate the device by 50% in harsh environments and ensure the clamp voltage reflects actual Ipp, not just single-pulse conditions. Consider using parallel TVS diodes with ballast resistors if the expected surge current exceeds 600A (typical for Line-to-Ground surges). Environmental sealing also helps since the P4SMA540CA’s DO-214AC package, while robust, is not hermetic.
Is the P4SMA540CA suitable for DC link protection in a solar inverter with a nominal 380V bus, and what overvoltage transients need to be considered?
The P4SMA540CA is a viable option for transient suppression on a 380V DC bus, given its 460V reverse standoff voltage and 513V minimum breakdown, which allow normal operation with margin. However, solar inverters often experience load dump transients from disconnection or MPPT switching, generating spikes exceeding 600V. While the P4SMA540CA clamps at 740V max, repeated exposure reduces lifespan. Use it as a secondary protector behind a primary varistor (e.g., 470V MOV) to absorb bulk energy, reserving the P4SMA540CA for fast, lower-energy transients. Also, ensure the inverter’s ground path impedance is low to prevent voltage stacking across the TVS during fast dv/dt events. Derate the P4SMA540CA’s power rating by 40% in high-temperature enclosures (>85°C ambient).
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.
P4SMA540CA CAD Models
NextGen Components P4SMA540CA PCB symbols & footprints
productDetail
