Class I High Reliability Chip (COG/NPO)

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 (up to 200°C) 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	1210	1515	1812	1825	2020	2225	2520	3530
LENGTH-NOM	0.120	0.150	0.180	0.180	0.200	0.220	0.250	0.350
WIDTH-NOM	0.100	0.150	0.120	0.250	0.200	0.250	0.200	0.300
THICK-MAX	0.100	0.150	0.200	0.200	0.200	0.250	0.250	0.250

Max Capacitance Table*

SIZE	1210	1515	1812	1825	2020	2225	2520	3530
250V	562	153	153	473	393	563	563	104
500V	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	5550	6560	7565	8840	11050	13060
250V	154	184	224	394	474
500V	823	104	124	224	274
1000V	473	563	823	124	184
2000V	223	273	473	683	823
3000V	153	183	273	333	473
4000V	562	682	103	153	223	682	183	273
5000V	392	472	682	103	123	392	822	153
7000V	152	182	272	392	472	182	392	482
10000V		681	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.

COG/NPO (N) Up to 250°C

Material:	COG/NPO 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.

Ordering Information

Prefix	Case Size	Dielectric	Capacitance	Tolerance	Termination	Voltage	Suffix
WCN	1515	N	222	K	D	102
WC - Standard WCN - High Reliability 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	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

Dielectric Code	Material	Temperature Coefficient Please see Dielectric Characteristics for more information
N	COG/NPO	-55°/+125°C
N	COG/NPO	Hi Temp -55°/+250°C
R	N2T	-55°/+125°C/ ±500pm
R	N2T	Hi Temp -55°/+250°C
X	X7R/BR	BR -55°/+125°C
X	X7R/BR	Hi Temp -55°/+250°C
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
SMS	Special Solder required (Sn95Sb05)

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