PTC thermistors for overcurrent
protection
Leaded disks, coated, 63 V
Series/Type:
B599*0
Date:
March 2006
EPCOS AG 2006. Reproduction, publication and dissemination of this publication, enclosures hereto and the
information contained therein without EPCOS' prior express consent is prohibited.
Applications
Overcurrent and short-circuit protection
Features
Lead-free terminals
Wide range of rated currents:
30 mA up to 1 A
Manufacturer's logo and type designation
stamped on in black or red for T
ref
= 80
C
and for T
ref
= 120
C and 130
C
stamped on in white
UL approval for T
ref
= 120
C and 130
C to
UL 1434 with V
max
= 65 V and V
R
= 63 V (file
number E69802)
UL approval for T
ref
= 80
C to UL 1434 with
V
max
= 63 V and V
R
= 50 V (file number
E69802)
VDE approval (license number 104843 E)
RoHS-compatible
Options
Leadless disks and leaded disks without
coating available on request
Thermistors with diameter b
11.0 mm are
also available on tape (to IEC 60286-2)
Delivery mode
Cardboard strips (standard)
Cardboard tape reeled or in Ammo pack on
request
Dimensional drawing
Dimensions (mm)
Type
T
ref
C
b
max
h
max
d
C910
130
22.0
25.5
0.8
C930
80
22.0
25.5
0.6
C930
120
22.0
25.5
0.6
C930
130
17.5
21.0
0.8
C940
80
17.5
21.0
0.6
C940
120
17.5
21.0
0.6
C940
130
13.5
17.0
0.6
C950
80
13.5
17.0
0.6
C950
120
13.5
17.0
0.6
C950
130
11.0
14.5
0.6
C960
80
11.0
14.5
0.6
C960
120
11.0
14.5
0.6
C960
130
9.0
12.5
0.6
C970
80
9.0
12.5
0.6
C970
120
9.0
12.5
0.6
C970
130
6.5
10.0
0.6
C980
80
6.5
10.0
0.6
C980
120
6.5
10.0
0.6
C980
130
4.0
7.5
0.6
C990
80
4.0
7.5
0.5
C990
120
4.0
7.5
0.5
Overcurrent protection
Leaded disks, coated, 63 V
C910 ... C990
Page 2 of 13
Please read Important notes and
Cautions and warnings at the end of this document.
General technical data
Max. operating voltage
(T
A
= 60
C)
V
max
80
VDC or VAC
Rated voltage
V
R
63
VDC or VAC
Switching cycles
N
100
Tolerance of R
R
(T
ref
= 80
C or 120
C)
R
R
25
%
Tolerance of R
R
(T
ref
= 130
C)
R
R
20
%
Operating temperature range
(V = 0)
T
op
40/+125
C
Operating temperature range
(V = V
max
, T
ref
= 80
C)
T
op
40/+85
C
Operating temperature range
(V = V
max
, T
ref
= 120
C/130
C) T
op
40/+125
C
Electrical specifications and ordering codes
Type
I
R
mA
I
S
mA
I
Smax
(V = V
max
)
A
I
r
(V = V
max
)
typ.
mA
T
ref
C
R
R
R
min
Ordering code
C910
1000
1500
10.0
60
130
1.2
0.8
B59910C0130A070
C930
700
1400
10.0
50
120
1.65
1.1
B59930C0120A070
C930
700
1100
8.0
50
130
2.2
1.5
B59930C0130A070
C940
450
900
8.0
40
120
2.3
1.5
B59940C0120A070
C940
450
690
5.5
30
130
3.3
2.2
B59940C0130A070
C930
340
700
10.0
35
80
1.65
1.1
B59930C0080A070
C950
320
640
5.5
30
120
3.7
2.4
B59950C0120A070
C950
320
500
4.3
25
130
4.9
3.2
B59950C0130A070
C960
250
500
4.3
25
120
5.6
3.7
B59960C0120A070
C960
250
380
3.0
20
130
8.0
5.2
B59960C0130A070
C940
245
500
8.0
25
80
2.3
1.5
B59940C0080A070
C950
170
350
5.5
20
80
3.7
2.4
B59950C0080A070
C970
150
240
1.0
18
130
20
13.2
B59970C0130A070
C970
150
300
3.0
20
120
9.4
6.2
B59970C0120A070
C960
130
265
4.3
15
80
5.6
3.7
B59960C0080A070
C970
90
190
3.0
11
80
9.4
6.2
B59970C0080A070
C980
85
170
1.0
16
120
25
16.5
B59980C0120A070
C980
85
130
0.7
15
130
62
40.9
B59980C0130A070
C980
50
110
1.0
8
80
25
16.5
B59980C0080A070
C990
50
100
0.7
12
120
55
36.3
B59990C0120A070
C990
30
60
0.7
5
80
55
36.3
B59990C0080A070
Overcurrent protection
Leaded disks, coated, 63 V
C910 ... C990
Page 3 of 13
Please read Important notes and
Cautions and warnings at the end of this document.
Reliability data
Test
Standard
Test conditions
R
25
/R
25
Electrical endurance,
cycling
IEC 60738-1
Room temperature, I
Smax;
V
max
Number of cycles: 100
< 25%
Electrical endurance,
constant
IEC 60738-1
Storage at V
max
/T
op
Test duration : 1000 h
< 25%
Damp heat
IEC 60738-1
Temperature of air: 40
C
Relative humidity of air: 93%
Duration: 56 days
Test according to IEC 60068-2-78
< 10%
Rapid change
of temperature
IEC 60738-1
T = T
LCT
, T = T
UCT
Number of cycles: 5
Test duration: 30 min
Test according to IEC 60068-2-14, Test Na
< 10%
Vibration
IEC 60738-1
Frequency range: 10 to 55 Hz
Displacement amplitude: 0.75 mm
Test duration: 3 2 h
Test according to IEC 60028-2-6, Test Fc
< 5%
Bump
IEC 60738-1
Pulse shape: half-sine
Acceleration: 50 g
Pulse duration: 1 ms; 6 3 pulses
Test according to IEC 60068-2-29
< 5%
Climatic sequence
IEC 60738-1
Dry heat: T = T
UCT
Test duration: 16 h
Damp heat first cycle
Cold: T = T
LCT
Test duration: 2 h
Damp heat 5 cycles
Tests performed according to
IEC 60068-2-30
< 10%
Overcurrent protection
Leaded disks, coated, 63 V
C910 ... C990
Page 4 of 13
Please read Important notes and
Cautions and warnings at the end of this document.
Characteristics (typical) for T
ref
= 80
C
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
R
versus ambient temperature T
A
(measured in still air)
Overcurrent protection
Leaded disks, coated, 63 V
C910 ... C990
Page 5 of 13
Please read Important notes and
Cautions and warnings at the end of this document.
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