Class II High Reliability Chip (X7R)

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	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	473	104	104	224	154	274	154
500V	223	563	563	154	104	184	124	394
1000V	562	183	183	563	473	823	563	184
2000V	102	392	392	153	123	183	153	473
3000V		152	152	392	332	472	392	183
4000V							152	562
5000V							102	472
7000V								182
10000V

SIZE	4040	4540	5550	6560	7565	8840	11050	13060
250V
500V	474	564
1000V	274	334	474	105	105
2000V	683	823	154	224	274
3000V	223	223	473	823	104
4000V	822	103	223	333	393	183	473	563
5000V	392	562	822	153	183	822	223	223
7000V	122	472	562	103	682	562	153	183
10000V	102	122	222	392	392	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 (X)

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.

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.

X8R (U) High Temperature

Material:	X8R High Temperature
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.

High Temp X7R (X) 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.

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