C0805C912J8JAC7800 vs C0805C822J3JAC7800

Part Number	C0805C912J8JAC7800	C0805C822J3JAC7800
Category	Ceramic Capacitors	Ceramic Capacitors
Manufacturer	KEMET	KEMET
Description	CAP CER 9100PF 10V U2J 0805	CAP CER 8200PF 25V U2J 0805
Package	Tape & Reel (TR)	Tape & Reel (TR)
Series	SMD Comm U2J	SMD Comm U2J
Features	Low ESL, Low Dissipation Factor	Low ESL, Low Dissipation Factor
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C
Mounting Type	Surface Mount, MLCC	Surface Mount, MLCC
Package / Case	0805 (2012 Metric)	0805 (2012 Metric)
Applications	General Purpose	General Purpose
Tolerance	±5%	±5%
Temperature Coefficient	U2J	U2J
Size / Dimension	0.079" L x 0.049" W (2.00mm x 1.25mm)	0.079" L x 0.049" W (2.00mm x 1.25mm)
Voltage - Rated	10V	25V
Lead Spacing	-	-
Thickness (Max)	0.035\" (0.88mm)	0.035\" (0.88mm)
Ratings	-	-
Height - Seated (Max)	-	-
Capacitance	9100 pF	8200 pF
Lead Style	-	-
Failure Rate	-	-

1. What are ceramic capacitors used for?

Ceramic capacitors are widely used in various electronic devices, mainly for:

Coupling and decoupling: used in circuits to isolate DC signals while transmitting AC signals.
Filtering: remove noise from the power supply or smooth the output voltage.
Resonant circuit: such as oscillators in radio frequency (RF) circuits.
Temperature compensation: some types of ceramic capacitors have temperature coefficients that can be used to stabilize circuit performance.
Bypass: provide a low impedance path for high-frequency signals, thereby reducing the impact on other parts.
2. Does the orientation of ceramic capacitors matter?

Ceramic capacitors are non-polar, so the mounting orientation does not affect their function.
3. 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.
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.