Class II Dielectric (Radial Commercial Chip X7R)

*RoHS Compliant if requested

The following table represents our standard listing of MLC’s produced from our stable EIA Class II X7R dielectric. In addition to the below listed standard case sizes, WCI is ideally situated to custom fabricate alternative size, thickness and/or voltage ratings per individual requirements. Should you not find what you are looking for please call the factory.

Class II X7R capacitors are very well suited to applications allowing for predictable changes in electrical properties given time, temperature and voltage. A temperature coefficient of ±15% is standard and typical results are detailed below. Common applications include aerospace, defense, pulse energy detonation and higher end consumer needs requiring a greater degree of safety/reliability.

Case Sizes (in inches)

SIZE 0805 1210 1515 1812 1825 2020 2225 2520 3530
LENGTH-NOM 0.160 0.200 0.270 0.300 0.300 0.320 0.350 0.400 0.470
WIDTH-NOM 0.150 0.200 0.250 0.220 0.350 0.300 0.350 0.300 0.400
THICK-MAX 0.200 0.200 0.250 0.300 0.300 0.350 0.350 0.350 0.350
LEAD SPACING 0.100 0.170 0.200 0.200 0.220 0.245 0.275 0.375


SIZE 4040 4540 5440 5550 6560 7565 8840 11050 13060
LENGTH-NOM 0.520 0.570 0.660 0.670 0.770 0.870 1.000 1.220 1.420
WIDTH-NOM 0.500 0.500 0.500 0.600 0.720 0.770 0.500 0.600 0.720
THICK-MAX 0.400 0.400 0.400 0.400 0.400 0.400 0.400 0.400 0.400
LEAD SPACING 0.425 0.475 0.565 0.575 0.675 0.775 0.900 1.125 1.325

Dimensions are ±5% length and width or .015;, whichever is greater.
MB=.005/.040

Note: These are standard sizes. We can manufacture any size required. Please consult factory for special builds.


Max Capacitance Table*

SIZE 0805 1210 1515 1812 1825 2020 2225 2520 3530
250V 273 124 394 394 125 105 155 185 275
500V 123 563 154 154 474 474 564 684 105
1000V 272 153 563 473 154 154 224 184 334
2000V 222 822 682 273 273 333 273 683
3000V 152 222 472 472 682 822 273
4000V 122 122 272 272 332 472 153
5000V 182 152 222 272 103
7000V 472
10000V 182


SIZE 4040 4540 5440 5550 6560 7565 8840 11050 13060
250V 475 565 685 685 825 126
500V 185 185 185 225 335 475
1000V 564 684 684 105 155 185
2000V 154 184 184 274 394 474
3000V 473 563 683 823 124 184
4000V 223 333 393 473 823 104
5000V 123 183 223 333 473 563
7000V 562 822 103 153 223 273
10000V 272 392 472 682 103 123

*Note: Maximum capacitance values are shown above as 3 digit code: 2 significant figures followed by the no. of zeros e.g. 153 = 15,000pF. R denotes decimal e.g. 1R5 = 1.5pF

Temperature Coefficient

X7R (Z)

Material: X7R (BR)
Operation Temperature Range: -55°C to 125°C.
Temperature Coefficient: ±15%
Dissipation Factor: 2.5% max at 25°C.
Insulation Resistance: at 25°C > 100GΩ or 1000MΩμF or whichever is less.
at 125°C > 10GΩ or 100MΩμF or whichever is less.
Dielectric withstanding Voltage: 250% for parts ≤250V.
150% for parts 250V-1KV.
120% for parts >1KV.
Aging Rate: <2% per decade.
Testing Parameters: 1kHz, 1.0 ± 0.2VRMS, 25°C.
1mHz for capacitance ≤ 100pF.
Temperature Coefficient, Percent Vs. Degrees C

X7R (B) - RoHs Compliance

Material: X7R (BR) RoHs Compliance
Temperature Coefficient: ±15%
Operation Temperature Range: -55°C to 125°C.
Dissipation Factor: 2.5% max at 25°C.
Insulation Resistance: at 25°C > 100GΩ or 1000MΩμF or whichever is less.
at 125°C > 10GΩ or 100MΩμF or whichever is less.
Dielectric withstanding Voltage: ≤500V is 250% rated voltage.
>500V - 1KV is 150% rated voltage.
>1KV is 120% rated voltage.
Aging Rate: <2% per decade.
Testing Parameters: 1kHz, 1.0 ± 0.2VRMS, 25°C.
1mHz for capacitance ≤ 100pF.
Temperature Coefficient, Percent Vs. Degrees C

X7R (X)

Material: X7R (BX)
Temperature Coefficient: ±15%
Voltage Coefficient: -25% Max.
Operation Temperature Range: -55°C to 125°C.
Dissipation Factor: 2.5% max at 25°C.
Insulation Resistance: at 25°C > 100GΩ or 1000MΩμF or whichever is less.
at 125°C > 10GΩ or 100MΩμF or whichever is less.
Dielectric withstanding Voltage: 250% for parts ≤250V.
150% for parts 250V-1KV.
120% for parts >1KV.
Aging Rate: <2% per decade.
Testing Parameters: 1kHz, 1.0 ± 0.2VRMS, 25°C.
1mHz for capacitance ≤ 100pF.
Temperature Coefficient, Percent Vs. Degrees C

X8R (U) High Temperature 160°C

Material: X8R High Temperature 160°C
Operation Temperature Range: -55°C to 160°C.
Temperature Coefficient: + 15% -25% Max
Dissipation Factor: 2.5% max at 25°C.
Insulation Resistance: at 25°C > 100GΩ or 1000MΩμF or whichever is less.
at 125°C > 10GΩ or 100MΩμF or whichever is less.
at 160°C > 1GΩ or 10MΩμF or whichever is less.
Dielectric withstanding Voltage: 250% for parts ≤250V.
150% for parts 250V-1KV.
120% for parts >1KV.
Aging Rate: <2% per decade.
Testing Parameters: 1kHz, 1.0 ± 0.2VRMS, 25°C.
1mHz for capacitance ≤ 100pF.
Temperature Coefficient, Percent Vs. Degrees C

High Temp X9R (V) Class II (200°C)

Material: High Temp X9R Class II (200°C)
Operation Temperature Range: -55°C to 200°C.
Temperature Coefficient: +15% -45% Max
Cap Drop at 200°C: -45% Max
Dissipation Factor: 2.5% max at 25°C.
Insulation Resistance: at 25°C > 100GΩ or 1000MΩμF or whichever is less.
at 125°C > 10GΩ or 100MΩμF or whichever is less.
at 200°C >1GΩ or 10MΩμF or whichever is less.
Dielectric withstanding Voltage: 250% for parts ≤250V.
150% for parts 250V-1KV.
120% for parts >1KV.
Aging Rate: <2% per decade.
Testing Parameters: 1kHz, 1.0 ± 0.2VRMS, 25°C.
1mHz for capacitance ≤ 100pF.
Temperature Coefficient, Percent Vs. Degrees C

X7R (W)

Material: X7R (BZ)
Operation Temperature Range: -55°C to 125°C.
Temperature Coefficient: ±15%
Dissipation Factor: 2.5% max at 25°C.
Insulation Resistance: at 25°C > 100GΩ or 1000MΩμF or whichever is less.
at 125°C > 10GΩ or 100MΩμF or whichever is less.
Dielectric withstanding Voltage: 250% for parts ≤250V.
150% for parts 250V-1KV.
120% for parts >1KV.
Aging Rate: <2% per decade.
Testing Parameters: 1kHz, 1.0 ± 0.2VRMS, 25°C.
1mHz for capacitance ≤ 100pF.
Temperature Coefficient, Percent Vs. Degrees C

Ordering Information

Prefix Case Size Encapsulation Dielectric Capacitance Tolerance Termination Voltage Suffix
WC 3530 C X 103 K D 302  
WC - Standard
WCN - Non Standard
WCR - RoHS
Chip Size Blank = Chip
C = Conformal Coating
E = E Lead
G = Gull Lead
J = J Lead
L = L Lead
T = Tab Lead
N = NPO
X = X7R

See Dielectric Characteristics for full list
Capacitance Value Code in pF
1st two digits significant, 3rd the power of ten
i.e.: 102 = 1000pF
F = ±1%
G = ±2%
J = ±5%
K = ±10%
M = ±20%
Z = +80%/-20%
V = +100%
A = Ag
D = PdAg
Voltage Code
1st two digits significant, 3rd the power of ten
i.e.
102 = 1000V
-NM = No Marking
-X### = Special Thickness

Dielectric Codes

Prefix RoHS Dielectric Code Material Temperature Coefficient
Please see Dielectric Characteristics for more information
    N COG/NPO -55°/+125°C
    M COG/NPO Hi Temp -55°/+300°C
 WC"R"  Y P NPO Hi Temp -55°/+250°C
  Y R N2T -55°/+125°C/ ±500pm
  Y S N2T -55°/+125°C/ ±300pm
  Y T N2T Hi Temp -55°/+200°C
    Z X7R/BR BR -55°/+125°C
 WC"R"  Y B X7R/BR BR -55°/+125°C
    X BX/MIL BX -55°/+125°C VC -25% max
    U X8R Hi Temp -55°/+160°C
    V X9R Hi Temp -55°/+200°C
  Y W X7R/BZ BZ -55°/+125°C
  Y Y Y5V Y5V -30°/+85°C

Prefixes

Prefix Description
WC Standard
WCN Non standard Requirements
High Temperature
High Reliability
WCR RoHS Compliant
HT High Temperature (Potted Units)
HTN High Temp w/ High Reliability Testing (Potted Units)
SM Surface Mount
SMN Surface Mount with High Reliability Testing

Capacitance Tolerance Codes

Code Tolerance
F ± 1%
G ± 2%
J ± 5%
K ± 10%
M ± 20%
Z +80%/-20%
V + 100%

Suffixes

Suffix Description
-NM No Marking
-NC No Coating
-X### Special Thickness