Overload Protection
Disks
B598*1
C 811 … C 891
265 V, 135
°C
Applications
q
Overcurrent and short-circuit protection
q
For enhanced rated current requirements
b
5 max.
Features
q
Coated thermistor disk
q
Surge-proof
q
Manufacturer’s logo and type designation
35 min.
h
stamped on in white
q
VDE approval (exception: C811)
Options
q
Leadless disks and leaded disks without
5
ø
d
TPT0648-4
Dimensions (mm)
Type
C 811
C 831
C 841
C 851
C 861
C 871
C 881
C 891
coating available upon request
q
Thermistors with diameter
b
≤
11,0 mm
are also available on tape
b
max
26,0
22,0
17,5
13,5
11,0
9,0
6,5
4,0
265
230
100
135
±
25 %
– 40/+ 125
0/60
∅
d
0,8
0,6
0,6
0,6
0,6
0,6
0,6
0,5
V
V
°C
°C
°C
h
max
29,5
25,5
21,0
17,0
14,5
12,5
10,0
7,5
Max. operating voltage (T
A
= 60
°C)
Rated voltage
Switching cycles (typ.)
Reference temperature (typ.)
Resistance tolerance
Operating temperature range (V = 0)
(V =
V
max
)
V
max
V
N
N
T
Ref
∆
R
N
T
op
T
op
Type
I
N
mA
I
S
mA
1450
970
700
445
320
225
120
65
C 811
C 831
C 841
C 851
C 861
C 871
C 881
C 891
730
470
350
215
150
108
60
30
I
Smax
(V=V
max
)
A
10,0
7,0
4,1
2,2
1,5
1,0
0,4
0,2
t
S
(V
max
,
I
Smax
)
s
< 10
< 8
< 8
< 8
< 8
< 8
< 8
< 8
I
r
(typ.)
(V=V
max
)
mA
25
20
15
13
10
9
6
5
R
N
Ω
2,6
3,7
6
10
15
25
70
150
R
min
Ω
1,8
2,6
4,3
7,1
10,6
17,8
49,8
107
Ordering code
B59811-C135-A70
B59831-C135-A70
B59841-C135-A70
B59851-C135-A70
B59861-C135-A70
B59871-C135-A70
B59881-C135-A70
B59891-C135-A70
70
Siemens Matsushita Components
B598*1
C 811 … C 891
Characteristics (typical)
PTC resistance
R
PTC
versus
PTC temperature
T
PTC
(measured at low signal voltage)
PTC current
I
PTC
versus PTC voltage
V
PTC
(measured at 25
°C
in still air)
Switching time
t
S
versus switching current
I
S
(measured at 25
°C
in still air)
Rated current
I
N
versus ambient temperature
T
A
(measured in still air)
Siemens Matsushita Components
71
B598*1
C 811 … C 891
Characteristics (typical)
PTC resistance
R
PTC
versus
PTC temperature
T
PTC
(measured at low signal voltage)
PTC current
I
PTC
versus PTC voltage
V
PTC
(measured at 25
°C
in still air)
Switching time
t
S
versus switching current
I
S
(measured at 25
°C
in still air)
Rated current
I
N
versus ambient temperature
T
A
(measured in still air)
72
Siemens Matsushita Components