Feed-Through
Capacitors
B85121/B85122 (10 25 A)
Feed-Through Capacitors
10 ... 25 A
Rated current up to 25 A
Rated voltage up to 600 Vdc/440 Vac (50/60 Hz)
Construction
B85121
B85122
3
3
3
3
3
3
3
3
FK technology
Dielectric: oil-impregnated paper (free of PCB)
Electrodes: metal foils
MP technology (self-healing)
Dielectric: oil-impregnated paper (free of PCB)
Electrodes: metallized paper
Metal case
Glass or ceramic feed-throughs
Hermetically soldered
Features
For central screw fixing
High contact reliability
Applications
Broadband interference suppression
for ac/dc supply and control lines
up to 25 A
Terminals
3
Axial leads, tinned
Marking
Manufacturer, ordering code,
rated capacitance, EMI suppression class,
rated voltage, rated current,
climatic category, date of manufacture (MM.YY)
Standards
Capacitors marked with EMI suppression class
comply with VDE 0565-1
Safety information
If high-capacitance feed-through capacitors are used,
protective measures (e.g. protective earthing) in accordance
with equipment/system regulations are required.
2
02/01
Feed-Through Capacitors
10 ... 25 A
Dimensional drawings
B85121-A, B85122-A
B85121
B85122
Slotted nut and spring washer included in deleivery
Type
B85122-A-B2
B85121-A-B3
B85121-A-B9, -B15
B85121-A-B4
B85121-A-C37
B85121-D
Dimensions (mm)
Thread
Mounting
hole
Creep-
age dis-
tance/
clear-
ance
t
4 mm
d
1
16
16
20
20
l
1
24
34
l
2
l
3
m
d
2
1
1
2
2
42,5 16,5 16
52,5 16,5 16
18
18
19
17
17
M10
u
0,75 10,5 +0,3
M10
u
0,75 10,5 +0,3
M12
u
0,75 12,5 +0,5
M12
u
0,75 12,5 +0,5
M12
u
0,75 12,5 +0,5
26,5 46
38,5 58
32
52
B85121-A-B5, -B6, -B39 20
18,5 2
Mounting hole:
Type
B85121-D-B1... -B4
B85121-D-B5, -B6
l
1
(mm)
l
2
(mm) Accessories
25
30
41
46
Slotted nut and spring washer
included in delivery
Creep. dist./clearance
t
2 mm
1) max.
2) B85121-A-C37: length 45
H
5
3)B85121-A-C37: length 65
H
5
3
02/01
Feed-Through Capacitors
10 ... 25 A
Technical data
Test voltage
V
P
Insulation resistance
R
is
or time constant
W
=
C
R
R
is
Capacitance tolerance
Climatic category
Terminal/case (layer/layer)
B85121
B85122
C
N
d
0,33
P
F
t
12000 M
:
C
N
!
0,33
P
F
t
4000 s
r
20 %
In accordance with IEC 68-1
FK technology: 40/100/56 (–40
q
C/+100
q
C/56 days damp heat test)
MP technology: 40/085/56 (–40
q
C/+85
q
C/56 days damp heat test)
Characteristics and ordering codes
I
R
A
10
10
10
10
10
10
16
16
16
16
25
25
25
25
25
V
R
Vdc/Vac
50/60 Hz
350/250
1)
160/110
80/42
250/100
250/42
600/250
3)
440/250
3)
350/250
160/75
440/250
3)
440/250
3)
600/440
160/75
V
P
Vac
400 Hz Vdc, 2 s
1500
1500
750
900
400
1075
3950
3750
1600
300
3750
3750
3750
3950
450
C
R
Class
2)
5000 pF
0,01
P
F
0,025
P
F
0,05
P
F
0,1
P
F
0,05
P
F
2500 pF
5000 pF
0,05
P
F
1,0
P
F
0,01
P
F
0,035
P
F
0,05
P
F
0,035
P
F
1
P
F
Y
Y
Y
X1
Y
Y
X2
Tech-
nology
FK
FK
FK
FK
MP
FK
FK
FK
FK
MP
FK
FK
FK
FK
MP
Approx. Ordering code
weight
g
13
13
13
13
15
15
30
23
28
30
36
51
51
55
55
B85121-D-B1
B85121-D-B2
B85121-D-B3
B85121-D-B4
B85121-D-B5
B85121-D-B6
B85122-A-B2
B85121-A-B3
B85121-A-B9
B85121-A-B15
B85121-A-B4
B85121-A-B5
B85121-A-B6
B85121-A-B39
B85121-A-C37
350/250
1)
115
115
60
–
60
–
220
115
115
40
115
115
220
–
440/250
3)
115
1) Not for power line operation!
2) In accordance with VDE 0565-1
3) If the capacitors are not used as Y capacitors, but e.g. for connection to anode voltage lines, the max. permissible
operating voltage is 350 Vrms, 60 Hz/750 Vdc
4
02/01
Feed-Through Capacitors
10 ... 25 A
B85121
B85122
Published by EPCOS AG
Marketing Communications, P.O. Box 80 17 09, 81617 Munich, GERMANY
¤
EPCOS AG 2001. All Rights Reserved. Reproduction, publication and dissemination of this bro-
chure and the information contained therein without EPCOS’ prior express consent is prohibited.
The information contained in this brochure describes the type of component and shall not be con-
sidered as guaranteed characteristics. Purchase orders are subject to the General Conditions for
the Supply of Products and Services of the Electrical and Electronics Industry recommended by the
ZVEI (German Electrical and Electronic Manufacturers’ Association), unless otherwise agreed.
This brochure replaces the previous edition.
For questions on technology, prices and delivery please contact the Sales Offices of EPCOS AG or
the international Representatives.
Due to technical requirements components may contain dangerous substances. For information on
the type in question please also contact one of our Sales Offices.
5
02/01