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1808J0250474KDT
Part Number 1808J0250474KDT
Manufacturer Knowles Syfer
Description CAP CER 0.47UF 25V X7R 1808
Quantity Available 97101 pcs new original in stock.
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Datasheets 1.1808J0250474KDT.pdf2.1808J0250474KDT.pdf
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Technical Information of 1808J0250474KDT
Manufacturer Part Number 1808J0250474KDT Category Capacitors
Manufacturer Knowles Syfer Description CAP CER 0.47UF 25V X7R 1808
Package / Case 1808 (4520 Metric) Quantity Available 97101 pcs
Voltage - Rated 25V Tolerance ±10%
Thickness (Max) 0.079' (2.00mm) Temperature Coefficient X7R
Size / Dimension 0.177' L x 0.079' W (4.50mm x 2.00mm) Series -
Ratings - 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 High Temperature Failure Rate -
Capacitance 0.47 µF Base Product Number 1808J
Applications High Reliability  
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Frequently Asked Questions

  • How does the 0.47 µF capacitance value of the 1808J0250474KDT capacitor influence noise suppression in power distribution networks of compact embedded designs? The 0.47 µF capacitance of the 1808J0250474KDT capacitor provides a practical low-impedance path that attenuates noise in the 10-100 MHz range typical of switching regulators in embedded systems, allowing designers to select this value for cost-effective decoupling without needing multiple smaller capacitors in tight layouts where board real estate is limited.
  • What practical effect does the ±10% tolerance of the 1808J0250474KDT capacitor have on timing-sensitive analog circuits? The ±10% tolerance of the 1808J0250474KDT capacitor can shift resonant frequencies in LC filter networks by up to 10%, which may require careful simulation to ensure phase margins remain acceptable in precision timing applications, especially when substituting for higher-tolerance film capacitors due to size constraints.
  • In a 25V system, how should the voltage rating of the 1808J0250474KDT capacitor influence derating strategies for long-term reliability? With its 25V rating, the 1808J0250474KDT capacitor benefits from operating at 50-70% of rated voltage in noisy industrial environments to minimize dielectric stress and extend mean time between failures, particularly when temperature rises could compound voltage transients.
  • Why is the X7R temperature coefficient specification of the 1808J0250474KDT capacitor relevant when designing circuits exposed to thermal cycling? The X7R coefficient of the 1808J0250474KDT capacitor limits capacitance drift to roughly 15% across its full range, enabling stable filter cutoff points in temperature-variable setups like outdoor controllers, whereas steeper slopes in other dielectrics might necessitate recalibration of gain stages.
  • What operating temperature window does the 1808J0250474KDT capacitor cover, and how does it align with high-temperature industrial equipment needs? The -55°C to 125°C operating range of the 1808J0250474KDT capacitor supports direct use in environments approaching 125°C with minimal derating, making it viable for heavy industrial machinery where thermal management is basic, though additional cooling may be needed near the upper limit to prevent accelerated aging.
  • How does the 1808 (4520 Metric) package size of the 1808J0250474KDT capacitor support density-focused PCB layouts? The 4.50 mm length and 2.00 mm width of the 1808J0250474KDT capacitor footprint reduce lateral space requirements compared to larger packages, allowing tighter routing around high-speed signals in space-constrained modules while maintaining adequate leadless pad areas for reliable reflow attachment.
  • What height considerations apply when integrating the 1808J0250474KDT capacitor into assemblies with overall thickness limits? At a maximum seated height of 2.00 mm, the 1808J0250474KDT capacitor keeps stack-up budgets low for slim consumer or portable electronics, but designers must account for solder paste thickness variations during assembly to avoid exceeding the limit and compromising fit in enclosed housings.
  • What mounting approach is recommended for the surface mount MLCC of the 1808J0250474KDT capacitor in automated production lines? The leadless surface mount design of the 1808J0250474KDT capacitor enables straightforward pick-and-place and reflow soldering with standard 0.5 mm pitch nozzles, though placement accuracy should target within 0.05 mm to maintain consistent electrical contact in high-volume lines where vibration could loosen connections over time.
  • How does the high-temperature operation of the 1808J0250474KDT capacitor support use in demanding thermal environments? The wide temperature coefficient and construction of the 1808J0250474KDT capacitor allow sustained performance up to 125°C without significant capacitance loss, making it suitable for industrial equipment with basic airflow, provided junction temperatures stay below the rating to preserve insulation resistance.
  • In high-reliability designs, what features of the 1808J0250474KDT capacitor help mitigate failure risks under vibration and thermal stress? The monolithic ceramic construction of the 1808J0250474KDT capacitor with its X7R dielectric offers mechanical robustness and stable electrical behavior under combined shock and temperature cycling, reducing the chance of microcracking in environments where the component sees repeated stress cycles.
  • Should the 1808J0250474KDT capacitor be considered for general-purpose decoupling in 3.3V logic sections of mixed-voltage boards? The 25V rating of the 1808J0250474KDT capacitor provides substantial margin above typical 3.3V logic swings, making it appropriate for basic decoupling without excessive leakage, though the 0.47 µF value may be oversized for very low-current applications where smaller capacitances would suffice to minimize self-resonance effects.
  • When migrating from standard-grade capacitors, how does the reliability profile of the 1808J0250474KDT capacitor influence selection in automotive-adjacent industrial systems? The high-reliability X7R formulation and controlled tolerance of the 1808J0250474KDT capacitor support consistent behavior in temperature-cycling scenarios common to industrial equipment, offering a pathway to replace less stable parts while maintaining similar footprint without redesigning the board layout.
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