capacitors in X7R dielectric feature a 125°C maximum operating
temperature. The Electronics Industries Alliance (EIA) characterizes
X7R dielectric as a Class II "temperature stable" material.
Components of this classification are fixed, ceramic dielectric
capacitors suited for bypass and decoupling applications or for
frequency discriminating circuits where Q and stability of capacitance
characteristics are not critical. X7R exhibits a predictable change in
capacitance with respect to time and voltage and boasts a minimal
change in capacitance with reference to ambient temperature.
Capacitance change is limited to ±15% from -55°C to +125°C.
These devices meets the flame test requirements outlined in UL
Standard 94V-0.
Benefits
•
•
•
•
•
•
Radial leaded form factor
Conformally coated
0.100", 0.200", 0.250" and 0.400" lead spacing
-55°C to +125°C operating temperature range
Lead (Pb)-Free, RoHS and REACH compliant
X7R temperature stable dielectric
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Ordering Information
C
Ceramic
315
316
317
318
320
321
322
323
1
2
320
Style/Size
324
325
326
327
328
330
331
333
335
336
340
346
350
356
C
Specification/
Series
C = Standard
106
Capacitance
Code (pF)
K
Capacitance
Tolerance
1
3
R
5
T
Lead
Finish
2
A
Failure
Rate
7301
Packaging
(C-Spec)
3
Blank = Bulk
7301 = 12" Reel
7303 = 12" Reel
7293 = Ammo
Pack
Rated Voltage
Dielectric Design
(VDC)
3 = 25
5 = 50
1 = 100
2 = 200
A = 250
R = X7R
First two digits
J = ±5%
represent
K = ±10%
significant
M = ±20%
figures. Third digit
specifies number
of zeros.
5=
T = 100% A = N/A
Multilayer Matte Sn
H = SnPb
(60/40)
Additional capacitance tolerance offerings may be available. Contact KEMET for details.
Lead materials:
Standard: 100% matte tin (Sn) with nickel (Ni) underplate and steel core ( “T” designation).
Alternative 1: 60% tin (Sn)/40% lead (Pb) finish with copper-clad steel core ( “H” designation).
Alternative 2: 60% tin (Sn)/40% lead (Pb) finish with 100% copper core (available with “H” designation code with C-Spec). Contact KEMET for C-Spec details.
3
Tape and Reel:
C-Spec 7303: 18.0 mm minimum lead length. Not available for Size/Style C321 and C331.
C-Spec 7301: 16.0 ± 0.5 mm lead length. Not available for Size/Style C321 and C331.
Ammo Pack:
C-Spec 7293: Ammo Pack option is not available for Size/Style C321, C331, C350 and C356.
For more information see Tape & Reel Packaging Information
Capacitance Change with Reference to +25°C and 0 VDC Applied (TCC)
Aging Rate (Maximum % Cap Loss/Decade Hour)
Dielectric Withstanding Voltage
Dissipation Factor (DF) Maximum Limit at 25ºC
Insulation Resistance (IR) Limit at 25°C
-55°C to +125°C
±15%
3.0%
250% of rated voltage
(5 ±1 second and charge/discharge not exceeding 50 mA at 25ºC)
See Dissipation Factor Limit Table
See Insulation Resistance Limit Table
(Rated voltage applied for 120 ±5 seconds at 25°C)
Parameters/Characteristics
Regarding Aging Rate: Capacitance measurements (including tolerance) are indexed to a referee time of 48 or 1,000 Hours. Please refer to a part number specific
datasheet for referee time details.
To obtain IR limit, divide MΩ-µF value by the capacitance and compare to GΩ limit. Select the lower of the two limits.
Capacitance and dissipation factor (DF) measured under the following conditions:
1 kHz ±50 Hz and 1.0 ±0.2 V
rms
Note: When measuring capacitance it is important to ensure the set voltage level is held constant. The HP4284 and Agilent E4980 have a feature known as
Automatic Level Control (ALC). The ALC feature should be switched to "ON."
