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Home > Products > Capacitors > Ceramic Capacitors > 1808YA250181MXRSP
Knowles Syfer
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1808YA250181MXRSP

In Stock 114620 pcs Reference Price(In US Dollars)
1+
$0.4691
200+
$0.1825
500+
$0.1754
1000+
$0.1725
Manufacturer Part Number:
1808YA250181MXRSP
Manufacturer / Brand
Knowles Syfer
Part of Description:
CAP CER 180PF 250V X7R 1808
Datasheets:
1808YA250181MXRSP.pdf
Lead Free Status / RoHS Status:
ROHS3 Compliant
Stock Condition:
New original, 114620 pcs Stock Available.
ECAD Model:
Ship From:
Hong Kong
Shipment Way:
DHL/Fedex/TNT/UPS

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Part Number 1808YA250181MXRSP
Manufacturer / Brand Knowles Syfer
Stock Quantity 114620 pcs Stock
Category Capacitors > Ceramic Capacitors
Description CAP CER 180PF 250V X7R 1808
Lead Free Status / RoHS Status: ROHS3 Compliant
Voltage - Rated 250V
Tolerance ±20%
Thickness (Max) 0.079' (2.00mm)
Temperature Coefficient X7R
Size / Dimension 0.177' L x 0.079' W (4.50mm x 2.00mm)
Series FlexiCap™
Ratings X2
Package / Case 1808 (4520 Metric)
Package Tape & Reel (TR)
Operating Temperature -55°C ~ 125°C
Mounting Type Surface Mount, MLCC
Lead Style -
Lead Spacing -
Height - Seated (Max) -
Features Soft Termination, High Voltage
Failure Rate -
Capacitance 180 pF
Base Product Number 1808Y
Applications Safety, Boardflex Sensitive

Packaging & ESD

Industry-standard static shielding packaging is used for electronic components.Anti-static, light-transparent materials allow easy identification of ICs and PCB assemblies.
The packaging structure provides electrostatic protection based on Faraday cage principles.This helps protect sensitive components from static discharge during handling and transportation.


All products are packed in ESD-safe anti-static packaging. Outer packaging labels include part number, brand, and quantity for clear identification. Goods are inspected prior to shipment to ensure proper condition and authenticity.

ESD protection is maintained throughout packing, handling, and global transportation. Secure packaging provides reliable sealing and resistance during transit. Additional cushioning materials are applied when required to protect sensitive components.

QC(Part Testing by IC Components)Quality Warranty

We can offer worldwide express delivery service, such as DHLor FedEx or TNT or UPS or other forwarder for shipment.

Global Shipment by DHL/FedEx/TNT/UPS

Shipping Fees reference DHL/FedEx
1). You can offer your express delivery account for shipment, ifyou haven’t any express account for shipment, we can offer our account inadvance.
2). Use our account for shipment, Shipment charges(Reference DHL/FedEx, Different Countries has different price.)
Shipment charges： (Reference DHL and FedEX)
Weight(KG): 0.00kg-1.00kg Price(USD$) : USD$60.00
Weight(KG): 1.00kg-2.00kg Price(USD$) : USD$80.00
* The price of cost is reference with DHL/FedEx. The detail charges, please contact us. Different country the express charges are different.



We accept the payment terms: Telegraphic Transfer(T/T), Credit Card, PayPal and Western Union.

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Company Name : IC COMPONENTS LTD
Paypal ID: Info@IC-Components.com

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Company Name : IC COMPONENTS LTD Beneficiary Account Number : 549-100669-701
Beneficiary Bank name : Bank of Communications (Hong Kong) Ltd Beneficiary Bank Code : 382 (for local payment)
Beneficiary Bank SWIFT : COMMHKHK
Beneficiary Bank Address : Tsuen Wan Market Street Branch 53 Market Street, Tsuen Wan N.T., Hong Kong

Any inquires or questions, please kindly contact us Email: Info@IC-Components.com


Frequently Asked Questions

Why is the FlexiCap termination on the 1808YA250181MXRSP preferred for high-vibration industrial sensor applications?
The 1808YA250181MXRSP utilizes Knowles Syfer’s proprietary FlexiCap™ technology, which incorporates a flexible epoxy polymer layer between the ceramic body and the solderable termination. In industrial environments where PCB flexing or mechanical vibration is common, standard 1808 ceramic capacitors often suffer from stress-induced cracks that lead to short circuits; however, the 1808YA250181MXRSP absorbs these mechanical strains, significantly increasing the reliability of the safety-critical EMI filtering stage.
How does the X2 safety rating of the 1808YA250181MXRSP affect its implementation in across-the-line AC filtering?
The X2 rating on the 1808YA250181MXRSP indicates that it is specifically designed to withstand high-voltage impulses and transients without creating a safety hazard in the event of a failure. When used in across-the-line applications, the 1808YA250181MXRSP is engineered to fail open rather than shorted, which prevents potential fire hazards in power supply input stages or motor control circuits connected to 250V mains.
What is the expected capacitance change for the 1808YA250181MXRSP when operating at its maximum 250V DC bias?
Since the 1808YA250181MXRSP uses an X7R dielectric, it is subject to the Voltage Coefficient of Capacitance (VCC) effect, where the effective capacitance drops as DC voltage increases. At the full 250V rated bias, the 1808YA250181MXRSP may see a capacitance reduction of approximately 20% to 40% from its nominal 180pF value; engineers must account for this reduction when calculating the cutoff frequencies for noise suppression filters in high-voltage DC-DC converters.
Can the 1808YA250181MXRSP be used as a direct replacement for a C0G (NP0) capacitor in a precision RF matching network?
Replacing a C0G part with the 1808YA250181MXRSP is not recommended for high-precision RF applications because the X7R dielectric has a non-linear temperature coefficient and a ±20% tolerance. While the 1808YA250181MXRSP offers excellent safety and mechanical robustness, its capacitance fluctuates by ±15% across the -55°C to 125°C range, whereas a C0G capacitor would remain stable, making the 1808YA250181MXRSP better suited for EMI suppression rather than frequency-stable resonant circuits.
What layout considerations are necessary for the 1808YA250181MXRSP to maintain its 250V safety clearance requirements?
The 1808YA250181MXRSP uses a 4520 metric (1808) footprint, which provides a longer physical path between terminals than smaller 0805 or 1206 packages. To maintain the safety integrity of the 1808YA250181MXRSP, the PCB designer must ensure that the creepage and clearance distances on the board surface meet the standards defined by IEC 62368-1, preventing surface arcing that could bypass the internal safety mechanisms of the capacitor.
Is the 1808YA250181MXRSP suitable for automotive battery management systems (BMS) where board-level mechanical stress is high?
The 1808YA250181MXRSP is highly suitable for BMS applications due to its "Boardflex Sensitive" feature and soft termination. Automotive environments involve thermal cycling and mechanical shock that can cause solder joint fatigue; the flexible termination of the 1808YA250181MXRSP allows the component to withstand greater PCB deflection than standard MLCCs, reducing the likelihood of catastrophic failure in high-voltage battery monitoring strings.
How does the ±20% tolerance of the 1808YA250181MXRSP impact the design of an input EMI filter for a medical power supply?
In EMI filter design, the 180pF nominal value of the 1808YA250181MXRSP serves as the baseline for calculating common-mode noise attenuation. The ±20% tolerance means the 1808YA250181MXRSP could realistically vary between 144pF and 216pF at room temperature; designers should perform a worst-case analysis to ensure that even at the lower tolerance limit, the 1808YA250181MXRSP provides sufficient impedance at the target noise frequencies to meet regulatory emissions standards.
What are the soldering profile risks when integrating the 1808YA250181MXRSP into a thick, multi-layer PCB?
When soldering the 1808YA250181MXRSP onto heavy copper planes, there is a risk of thermal shock if the preheat phase is too short. Because the 1808YA250181MXRSP has a larger 1808 ceramic mass, non-uniform heating can cause internal stress; following a gradual ramp-up and a controlled cooling rate of no more than 2°C per second is necessary to preserve the mechanical integrity of the FlexiCap™ layers and the ceramic dielectric.

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