C0805X912J5JAC7800 vs C315C223K5R5TA

Part Number	C0805X912J5JAC7800	C315C223K5R5TA
Category	Ceramic Capacitors	Ceramic Capacitors
Manufacturer	KEMET	KEMET
Description	CAP CER 9100PF 50V U2J 0805	CAP CER 0.022UF 50V X7R RADIAL
Package	Tape & Reel (TR)	Cut Tape (CT)
Series	SMD Comm U2J Flex	GoldMax 300 Comm X7R
Features	Low ESL, Soft Termination, Low Dissipation Factor	-
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C
Mounting Type	Surface Mount, MLCC	Through Hole
Package / Case	0805 (2012 Metric)	Radial
Applications	Boardflex Sensitive	General Purpose
Tolerance	±5%	±10%
Temperature Coefficient	U2J	X7R
Size / Dimension	0.079" L x 0.049" W (2.00mm x 1.25mm)	0.150" L x 0.100" W (3.81mm x 2.54mm)
Voltage - Rated	50V	50V
Lead Spacing	-	0.100\" (2.54mm)
Thickness (Max)	0.034\" (0.87mm)	-
Ratings	-	-
Height - Seated (Max)	-	0.183\" (4.66mm)
Capacitance	9100 pF	0.022 µF
Lead Style	-	Straight
Failure Rate	-	-

1. Why are ceramic capacitors better?

Small size: suitable for high-density circuit board design.
Good temperature resistance: can work over a wide temperature range.
High reliability: no electrolyte, so it is not easy to age.
Good frequency response: suitable for high-frequency applications.
Low ESR: low equivalent series resistance, which helps to improve efficiency.
2. How do I know if my ceramic capacitor is bad?

Visual inspection: Check for cracks, bulges, or other physical damage.
Multimeter test: Measure the capacitance value to see if it is close to the nominal value, and check for shorts or opens.
3. 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.
4. Why are mica capacitors so expensive?

Mica capacitors are expensive because of their excellent electrical properties (such as very low dissipation factor and stable temperature coefficient) and their high production costs.