>Capacitor Selection
The choice of dielectric is largely determined by the temperature stability required:
1. NPO(COG)
Ultra stable Class I dielectric, with predictable change of electrical properties on temperature, voltage, frequency and time. Used in circuits requiring stable performance.
2. X7R
Stable Class II dielectric, with predictable change of properties with temperature, voltage, frequency and time. Used as blocking, coupling, by-passing and frequency discriminating elements. This dielectric is ferroelectric and offers higher capacitance ranges than class I.
3. Y5V(Z5U)
General purpose Class II dielectric with highest dielectric constant and greater variation of properties with temperature and test conditions. Very high capacitance per unit volume and suited for application as well as filtering, transient suppression blocking, and charge storage application.
>General Specification
NPO
Capacitance Range: 0R5 - 104
Temperature Coefficient: 0+-30PPm/'C; C<=10nF R>=10000MQ
0+-60PPm/'C. (-55'C to +125'C)
Insulation Resistance: C<=10nF R>=10000MQC>=10nF C. R>=100S
With Standing Voltage: 2.5 times of working voltage
Dissipation Factor: 0.15%max(20'C, 1MHz, 1VDC)
Rated Voltage: 25, 50, 63, 100VDC
Capacitance Tolerance: B=+-0.1PF C=+-0.25PF D=+-0.5PF
F=+-1%G=+-2% J=+-5%K=+-10% M=+-20%
Life Test: 200% rated voltage at +125'C 1000h
Solderability: SJ/10211-91 4.11
Resistance to Soldering Heat: SJ/T10211-91 4.10
Mechanical Test: SJ/ T10211-91 4.9
Temperature Cycling: SJ/ T10211-91 4.12
Moisture Resistance: SJ/ T10211-91 4.14
Termination Adhesion Strength: SJ/ T10211-91 4.9
Company information
manufacturer of capacitors
Established in 1998, Shenzhen Topmay Electronic Co. Ltd is engaged in manufacturing, researching and developing a wide variety of capacitors.
Wide product range
Multilayer ceramic capacitors (radial, axial, and SMD)
Ceramic disc capacitors (low and high voltage)
Aluminum electrolytic capacitors (radial, axial and SMD)
Film capacitors (polyester, polypropylene and metallized)
Tantalum capacitors (radial, SMD, axial) and others)
Mica capacitors
Super capacitors
Monthly output of 1 million units
Prompt delivery
In-stock items: three- to five-day lead time
Regular orders: seven- to 10-day lead time
OEM orders: 15-day lead time
Audited Supplier 
){kind=link}