Class I High Reliability Leaded Chip (COG/NPO)

*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.

Produced according to meticulously defined standards, all parts are then conditioned at elevated temperature and voltage. 100% of all lots are screened for conformance to stated performance criteria. All units are tested to MIL-PRF-49467 however customer required screening can also be accommodated.

Our high reliability line of 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 not usually found in “cots” parts.

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 102 562 153 153 473 393 563 563 104
500V 681 392 682 103 183 153 273 183 473
1000V 152 392 562 123 103 183 123 273
2000V 391 122 122 392 392 562 472 153
3000V 561 122 182 272 222 682
4000V 681 681 102 102 272
5000V 471 391 681 561 182
7000V 821
10000V


SIZE 4040 4540 5440 5550 6560 7565 8840 11050 13060
250V 154 184 184 224 394 474
500V 823 104 104 124 224 274
1000V 473 563 563 823 124 184
2000V 223 273 333 473 683 823
3000V 153 183 123 273 333 473
4000V 562 682 822 103 153 223 682 183 273
5000V 392 472 472 682 103 123 392 822 153
7000V 152 182 182 272 392 472 182 392 482
10000V 681 821 122 182 222 122 182 222

*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 1515 N 222 K D 102  
WC - Standard
WCN - High Reliability
WCR - RoHS
SM - Surface Mount
SMN - Surface Mount with testing
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)
Y = Ni(PbSn)
C = Leads w/ PbSn Coating
Voltage Code
1st two digits significant, 3rd the power of ten
i.e.
102 = 1000V
-A MIL-PRF-49467
-NMNo Marking
-R####Bleed Resistor in MΩ
-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
-A MIL-PRF-49467
-NM No Marking
-NC No Coating
-R ### Bleed Resistor
-X### Special Thickness

Electrical test voltages for DWV and voltage conditioning

Device working voltage (DC) DWV Test Voltage Conditioning Test
< 200 2.5 X Rated 2.0 X Rated
250 500 Volts 400 Volts
300 500 Volts 400 Volts
400 600 Volts 500 Volts
500 750 Volts 600 Volts
600 – 1250 1.5 X Rated 1.0 X Rated
> 1250 1.2 X Rated 1.0 X Rated