Data Sheet
Data Sheet
Multilayer ceramic capacitors
Date:
October 2006
EPCOS AG 2006. Reproduction, publication and dissemination of this data sheet and the
information contained therein without EPCOS' prior express consent is prohibited.
Leaded capacitors, X7R
2
10/06
Please read Cautions and warnings and
Important notes at the end of this document.
Ordering code system
B37979N
1
100
K
54
Packaging
51 cardboard tape, reel packing (360-mm reel)
54 Ammo packing (standard)
00
bulk
^
^
^
Capacitance tolerance
J
5% (standard for C0G)
K
10% (standard for X7R)
M
20% (standard for Z5U (Y5U))
^
^
^
Type and size
With radial leads
EIA standard
Lead spacing 2.5 mm
5.5
5.0 2.5
6.5
5.0 2.5
Lead spacing 5.0 mm
5.5
5.0 2.5
6.5
5.0 2.5
9.0
7.5 2.5
Temperature characteristic
C0G
X7R
Z5U (Y5U)
B37979N
B37981M
B37982N
B37986N
B37987M
B37988N
B37979G
B37981F
B37982G
B37986G
B37987F
B37988G
--
B37984M
B37985N
0
Internal coding
Capacitance, coded
(example)
101
10 10
1
pF = 100 pF
222
22 10
2
pF = 2.2 nF
473
47 10
3
pF = 47 nF
^
^
^
Rated voltage
Rated voltage [VDC]
Code
50
100
5
1
Leaded
X7R
Multilayer ceramic capacitors
3
10/06
Please read Cautions and warnings and
Important notes at the end of this document.
Features
High volumetric efficiency
Non-linear capacitance change
High insulation resistance
High pulse strength
To AEC-Q200
Applications
Blocking
Coupling and decoupling
Interference suppression
Termination
Parallel wire leads, iron-nickel, tinned
Crimped leads
Non-standard lead lengths on request
Marking
Rated capacitance, tolerance, manufacturer's logo, ceramic material, voltage
Delivery mode
Cardboard tape in Ammo packing (standard)
Cardboard tape on 360-mm reel or bulk on request
Electrical data
Temperature characteristic
X7R
Max. relative capacitance change
within 55
C to +125 C
DC/C
15
%
Climatic category (IEC 60068-1)
55/125/56
Standard
EIA
Dielectric
Class 2
Rated voltage
1)
V
R
50,
100
VDC
Test voltage
V
test
2.5 V
R
/5 s
VDC
Capacitance range / E series
C
R
470 pF ... 1
mF (E6)
Dissipation factor (limit value)
tan
d
<25 10
3
Insulation resistance
2)
at + 25
C
R
ins
>10
5
M
W
Insulation resistance
2)
at +125
C
R
ins
>10
4
M
W
Time constant
2)
at + 25
C
t >1000
s
Time constant
2)
at +125
C
t >100
s
Operating temperature range
T
op
55 ... +125
C
Ageing
3)
yes
1) Note: No operation on AC line.
2) For C
R
>10 nF the time constant
t = C R
ins
is given.
3) Refer to chapter "General technical information", "Ageing".
Leaded
X7R
Multilayer ceramic capacitors
4
10/06
Please read Cautions and warnings and
Important notes at the end of this document.
X7R
Multilayer ceramic capacitors
Capacitance tolerances
Dimensional drawing
Dimensions (mm)
Termination
Code letter
K
(standard)
M
Tolerance
10%
20%
Lead spacing
= 2.5 +0.6/0.1 mm
Lead spacing
= 5.0 +0.6/0.1 mm
Type
B37981M
B37987M
Type
B37981F
B37987F
B37984M
h
max
w
max
th
max
5.5
5.0
2.5
6.5
5.0
2.5
h
max
w
max
th
max
5.5
5.0
2.5
6.5
5.0
2.5
9.0
7.5
2.5
KKE0456-R-E
w
th
h
30+5
0.500.05
e
*)
*)
Lead length for bulk packaging
**)
Seating plane to IEC 600717
**)
b
h
s
Ceramic dielectric
Encapsulation
Termination
KKE0457-Z-E
Metal layers
X7R
5
10/06
Please read Cautions and warnings and
Important notes at the end of this document.
X7R
Multilayer ceramic capacitors
Product range leaded capacitors, X7R
Lead spacing
2.5 mm
5.0 mm
h
b s (mm) 5.5 5.0 2.5 6.5 5.0 2.5 5.5 5.0 2.5 6.5 5.0 2.5 9.0 7.5 2.5
Type
B37981M
B37987M
B37981F
B37987F
B37984M
50
100
50
100
50
100
50
100
50
470
.
pF
680
.
pF
1.0 nF
1.5 nF
2.2 nF
3.3 nF
4.7 nF
6.8 nF
10
.
nF
15
.
nF
22
.
nF
33
.
nF
47
.
nF
68
.
nF
100
.
nF
150
.
nF
220
.
nF
330
.
nF
470
.
nF
680
.
nF
1.0
mF
V
R
(VDC)
C
R
X7R
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