Class II Radial High Reliability Leaded 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.

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 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 not usually found in “cots” parts.

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 183 823 224 124 684 684 684 684 225
500V 472 273 333 683 274 224 334 274 684
1000V 122 562 183 153 563 563 823 683 184
2000V 102 392 332 123 123 153 153 473
3000V 102 152 332 272 392 472 223
4000V 681 182 182 222 272 123
5000V 102 102 122 182 822
7000V 392
10000V 152


SIZE 4040 4540 5440 5550 6560 7565 8840 11050 13060
250V 475 475 565 685 825 106
500V 125 155 155 185 275 395
1000V 394 474 474 684 105 125
2000V 104 104 124 184 224 334
3000V 333 473 473 683 104 154
4000V 183 223 273 393 563 823 183 473 563
5000V 103 153 183 273 393 473 822 223 223
7000V 472 682 822 123 183 273 562 153 183
10000V 222 332 392 562 822 123 332 562 822

*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 (B)

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 (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 X7R (U) Class II (200°C)

Material: High Temp X7R 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

Ordering Information

Prefix Case Size Encapsulation Dielectric Capacitance Tolerance Termination Voltage Suffix
SMN 3840 TH R 124 K D 102 -R300
WC - Standard
WCN - High Reliability
WCR - RoHS
Chip Size C = Conformal Coating
L = Lead Only
H = High Temp Coating
N = NPO
R = N2200
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
C = Leads w/ SnPb Coating
Voltage Code
1st two digits significant, 3rd the power of ten
i.e.
102 = 1000V
-A MIL-PRF-49467
-NM No 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