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Series X7R

Series X7R

     Universal X7R Series MLCC, the class 2 multi-layer ceramic chip capacitor with a non-linear temperature coefficient, using ferroelectric dielectric material, is relatively stable with relatively high capacitance per volume. It is applied for bypass, coupling, filtering and frequency discrimination circuit with less demanding on stable capacitance. In the filtering circuit of DC-DC (AC) converter and switching power supply, it is used to gradually replace tantalum and aluminum electrolytic capacitors. 

I. Product Dielectric Property Type

Dielectric Property Type

Operating Temperature Range

Temperature Coefficient

General Standard

Reference Temperature

X7R

-55℃~+125℃

±15%

EIA

25℃

 

II. Basic Electrical Properties

 

Capacitance

 Within Nominal Capacitance Tolerance Range:

 K: ±10%, L: ±15%, M: ±20%

J: ±5% (Please consult our Sales Representatives or    Technical Service Engineers for Custom-made)

 Testing Conditions of   Capacitance/Loss Tangent:

 Temperature: 15℃~35℃;

 Relative Humidity: 25%~80%;

 Testing Frequency:

 C≤100pF, f=1MHz;

 C>100pF, f=1KHz;

 C≥10μF, f=120Hz or 1KHz.

 Testing Voltage: 1.0±0.2V (Effective  Value)

 

Loss Tangent

 

 UR≥50V  tgδ≤350×10-4

 UR=25V  tgδ≤350×10-4

 UR=16V  tgδ≤500×10-4

 UR≤10V  tgδ≤700×10-4

 

Insulation Resistance

 

 C ≤ 0.025μF     Ri ≥ 4000MΩ;

 C > 0.025μF     Ri ×C≥ 100MΩ·μF

 Rated Voltage:

 Temperature: 15℃~35℃;

 Relative Humidity: 25%~80%;

 1 minute ± 5 seconds

 

   Voltage Resistance

 

 2.5×UR, 1min, no breakdown or flashover

Apply 2.5 times rated voltage to the two ends of the product for 1 minute 

 

III. Capacitance- Temperature Characteristic

 

 

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