Page 1 of 4
Novacap Safety Certified Datasheet Issue 3 Release Date 15-Nov-2021
www.knowlescapacitors.com
Email Sales: (Europe)
The X2 (LS style) and X1 & Y2/X1 (ES style) Class Compliant chip capacitors specifically designed for use in modem, facsimile, telephone and other
electronic equipment where lightning or overvoltage surges can occur.
Both styles are rated at 250 Vac safety approved with C0G/NP0 and X7R dielectrics available (dependent on style).
Note – This is now a legacy range planned for obsolescence. Not for new designs. Superseded by Syfer brand safety
certified capacitors. See cross reference tables below.
Certification numbers
Dielectric
C0G
X7R
Certificate
number (TUV)
R 60145518
R 60150400
Type
Class
Impulse
Voltage
Size
Range
Type
Class
Impulse
Voltage
Size
Range
ES1808
X1
4kV
1808
4.7pF to
390pF
ES1808
X1
4kV
1808
150pF to
1.5nF
ES2211
Y2 / X1
5kV
2211
4.7pF to
1nF
LS1808
X2
2.5kV
1808
150pF to
4.7nF
ES2215
Y2 / X1
5kV
2215
820pF to
1nF
LS1808
X2
2.5kV
1808
4.7pF to
1.5nF
LS1812
X2
2.5kV
1812
1nF to
2.2nF
Dimensions - inches/mm
Size
LS 1808
LS 1812
ES 1808
ES 2211
ES 2215
L
inches:
mm:
0.178±0.014
4.50±0.35
0.178±0.014
4.50±0.35
0.178±0.014
4.50±0.35
0.224±0.016
5.70±0.40
0.224±0.016
5.70±0.40
W
inches:
mm:
0.079±0.012
2.00±0.30
0.126±0.012
3.20±0.30
0.079±0.012
2.00±0.30
0.110±0.012
2.79±0.30
0.150±0.014
3.81±0.35
T
inches:
mm:
0.079 Max
2.00 Max
0.100 Max
2.54 Max
0.079 Max
2.00 Max
0.100 Max
2.54 Max
0.100 Max
2.54 Max
MB
inches:
mm:
0.010 to 0.032
0.25 to 0.80
0.010 to 0.032
0.25 to 0.80
0.010 to 0.032
0.25 to 0.80
0.010 to 0.032
0.25 to 0.80
0.010 to 0.032
0.25 to 0.80
Creepage
inches:
mm:
0.118 Min
3.00 min
0.118 Min
3.00 min
0.118 Min
3.00 min
0.158 Min
4.00 Min
0.158 Min
4.00 Min
Novacap™ brand Safety Certified capacitors – X2, X1, Y2