1. No category

Overload Protection
Disks
B598*1
C 811 … C 891
265 V, 135 °C
5 max.
b
Applications
h
● Overcurrent and short-circuit protection
● For enhanced rated current requirements
35 min.
Features
● Coated thermistor disk
● Surge-proof
● Manufacturer’s logo and type designation
ød
5
stamped on in white
● VDE approval (exception: C811)
TPT0648-4
Options
Dimensions (mm)
● Leadless disks and leaded disks without
are also available on tape
Max. operating voltage (TA = 60 °C)
Rated voltage
Switching cycles (typ.)
Reference temperature (typ.)
Resistance tolerance
Operating temperature range (V = 0)
(V = Vmax)
Type
IN
IS
C 811
C 831
C 841
C 851
C 861
C 871
C 881
C 891
mA
730
470
350
215
150
108
60
30
mA
1450
970
700
445
320
225
120
65
70
ISmax
(V=Vmax)
A
10,0
7,0
4,1
2,2
1,5
1,0
0,4
0,2
bmax
26,0
22,0
17,5
13,5
11,0
9,0
6,5
4,0
Type
C 811
C 831
C 841
C 851
C 861
C 871
C 881
C 891
coating available upon request
● Thermistors with diameter b ≤ 11,0 mm
Vmax
VN
N
TRef
∆R N
Top
Top
tS
(Vmax, ISmax)
s
< 10
< 8
< 8
< 8
< 8
< 8
< 8
< 8
Ir (typ.)
(V=Vmax)
mA
25
20
15
13
10
9
6
5
265
230
100
135
± 25 %
– 40/+ 125
0/60
RN
Rmin
Ω
Ω
2,6
3,7
6
10
15
25
70
150
1,8
2,6
4,3
7,1
10,6
17,8
49,8
107
∅d
0,8
0,6
0,6
0,6
0,6
0,6
0,6
0,5
hmax
29,5
25,5
21,0
17,0
14,5
12,5
10,0
7,5
V
V
°C
°C
°C
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
Siemens Matsushita Components
B598*1
C 811 … C 891
Characteristics (typical)
PTC resistance RPTC versus
PTC temperature TPTC
(measured at low signal voltage)
PTC current IPTC versus PTC voltage VPTC
(measured at 25 °C in still air)
Switching time tS versus switching current IS
(measured at 25 °C in still air)
Rated current IN versus ambient temperature TA
(measured in still air)
Siemens Matsushita Components
71
B598*1
C 811 … C 891
Characteristics (typical)
PTC resistance RPTC versus
PTC temperature TPTC
(measured at low signal voltage)
PTC current IPTC versus PTC voltage VPTC
(measured at 25 °C in still air)
Switching time tS versus switching current IS
(measured at 25 °C in still air)
Rated current IN versus ambient temperature TA
(measured in still air)
72
Siemens Matsushita Components