Class I Dielectric (Commercial Chip COG)

*RoHS Compliant if requested

The following table represents our standard listing of MLC’s produced from our ultra-stable EIA Class I COG 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.

COG capacitors are very well suited to applications requiring extremely stable electrical properties given time, temperature and voltage. 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 0.080 0.120 0.150 0.180 0.180 0.200 0.220 0.250 0.350
WIDTH-NOM 0.050 0.100 0.150 0.120 0.250 0.200 0.250 0.200 0.300
THICK-MAX 0.100 0.100 0.150 0.200 0.200 0.200 0.250 0.250 0.250


SIZE 4040 4540 5440 5550 6560 7565 8840 11050 13060
LENGTH-NOM 0.400 0.450 0.540 0.550 0.650 0.750 0.880 1.100 1.300
WIDTH-NOM 0.400 0.400 0.400 0.500 0.600 0.650 0.400 0.500 0.600
THICK-MAX 0.300 0.300 0.300 0.300 0.300 0.300 0.300 0.300 0.300

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 152 822 223 223 563 473 683 563 124
500V 821 392 822 123 273 273 333 393 683
1000V 471 222 562 822 153 103 223 123 273
2000V 272 272 562 472 822 562 153
3000V 122 122 222 222 332 272 103
4000V 681 821 122 122 182 152 562
5000V 821 821 122 102 332
7000V 122
10000V 681


SIZE 4040 4540 5440 5550 6560 7565 8840 11050 13060
250V 184 204 224 224 394 474
500V 104 124 154 184 274 334
1000V 563 563 683 104 154 184
2000V 273 333 333 473 683 104
3000V 183 223 223 333 473 683
4000V 123 123 123 183 273 393
5000V 682 822 822 123 183 223
7000V 272 272 332 472 682 822
10000V 122 152 152 222 332 392

*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

COG/NPO (N)

Material: COG/NPO
Operation Temperature Range: -55°C to 125°C.
Temperature Coefficient: ± 30ppm/°C.
Dissipation Factor: 0.1% 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: 0% per decade.
Testing Parameters: 1kHz, 1.0 ± 0.2VRMS, 25°C.
1mHz for capacitance ≤ 100pF.
Temperature Coefficient, Percent Vs. Degrees C

COG/NPO (M) RoHs Compliance Up to 250°C

Material: COG/NPO RoHs Compliance Up to 250°C
Operation Temperature Range: -55°C to 250°C.
Temperature Coefficient: ± 30ppm/°C.
Dissipation Factor: 0.1% 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 250°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: 0% per decade.
Testing Parameters: 1kHz, 1.0 ± 0.2VRMS, 25°C.
1mHz for capacitance ≤ 100pF.
Temperature Coefficient, Percent Vs. Degrees C

C0G/NP0 (P) Stable High Temperature (300°C)

Material: C0G/NP0 Stable High Temperature (300°C)
Operation Temperature Range: -55°C to 300°C.
Temperature Coefficient: ± 30ppm/°C.
Dissipation Factor: 0.1% 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 300°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: 0% 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 Dielectric Capacitance Tolerance Termination Voltage Suffix
WCN 2520 X 102 K D 502  
WC - Standard
WCN - Non Standard
WCR - RoHS
Chip Size 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
N = Ni(Sn)
Voltage Code
1st two digits significant, 3rd the power of ten
i.e.
102 = 1000V
-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
-X### Special Thickness