K392M20X7RL5TH5 vs K392K20X7RL5UH5

Part Number	K392M20X7RL5TH5	K392K20X7RL5UH5
Category	Ceramic Capacitors	Ceramic Capacitors
Manufacturer	Vishay Beyschlag/Draloric/BC Components	Vishay Beyschlag/Draloric/BC Components
Description	CAP CER 3900PF 500V X7R RADIAL	CAP CER 3900PF 500V X7R RADIAL
Package	Tape & Reel (TR)	Tape & Box (TB)
Series	Mono-Kap™ K	Mono-Kap™ K
Features	-	-
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C
Mounting Type	Through Hole	Through Hole
Package / Case	Radial	Radial
Applications	General Purpose	General Purpose
Tolerance	±20%	±10%
Temperature Coefficient	X7R	X7R
Size / Dimension	0.197" L x 0.126" W (5.00mm x 3.20mm)	0.197" L x 0.126" W (5.00mm x 3.20mm)
Voltage - Rated	500V	500V
Lead Spacing	0.197\" (5.00mm)	0.197\" (5.00mm)
Thickness (Max)	-	-
Ratings	-	-
Height - Seated (Max)	0.299\" (7.60mm)	0.299\" (7.60mm)
Capacitance	3900 pF	3900 pF
Lead Style	Formed Leads	Formed Leads
Failure Rate	-	-

1. Can ceramic capacitors hold a charge?

Ceramic capacitors can store charge, but they have a higher leakage current than electrolytic capacitors, so they are less able to hold a charge.
2. Does the voltage of ceramic capacitors matter?

Voltage ratings are critical to ensure safe operation. Using a capacitor below the rated voltage may cause premature failure; using a capacitor above the rated voltage may cause immediate damage.
3. Why do ceramic capacitors make noise?

Some types of ceramic capacitors (particularly Class 2 ceramic capacitors) produce micro-vibrations when the voltage changes due to their material properties, which in turn cause faint mechanical noise.
4. What is the difference between Class 1 and Class 2 ceramic capacitors?

Class 1: has high accuracy and stable temperature coefficient, suitable for precision circuits.
Class 2: has higher capacitance value, but larger temperature coefficient and tolerance, suitable for general applications.