Switching applications
for electronic ballast
C1118, S1076
Applications
Switching PTC thermistor for preheating of
the electrodes in electronic ballasts
Features
Coated thermistor disk, kinked leads
Long product life: stable performance
throughout at least 30 000 switching cycles
Marked with manufacturer's logo and type
designation
RoHS-compatible
Delivery mode
C1118 cardboard strips; S1076 taped in
AMMO pack
Dimensional drawing
Dimensions (mm)
Type
C1118
C1118
S1076
General technical data
Switching cycles
Tolerance of R
R
Frequency
Operating temperature range
Operating temperature range
N
∆R
R
f
T
op
T
op
> 30000
±25
≤
70
25/+125
10/+80
T
ref
°C
80
120
120
w
max
6.5
6.5
7.5
h
max
10.0
10.0
14.5
∅d
0.6
0.6
0.6
(V = 0)
(V = V
max
)
%
kHz
°C
°C
Electrical specifications and ordering codes
Type
R
R
Ω
70
70
110
V
max
(t
≤
200 ms)
V
RMS
310
310
310
I
Smax
(V = V
max
)
mA
400
400
600
t
S
@ I
Smax
s
0.9
1.75
0.7
T
ref
(typ.)
°C
80
120
120
Ordering code
C1118
C1118
S1076
B59118C1080A070
B59118C1120A070
B59076S1120B054
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 2 of 9
Switching applications
for electronic ballast
C1118, S1076
Reliability data
Test
Electrical endurance,
cycling
Electrical endurance,
constant
Damp heat
Standard
IEC 60738-1
IEC 60738-1
IEC 60738-1
Test conditions
Room temperature, I
Smax
; V
max
Number of cycles: 30 000
Storage at V
max
/T
op,max
(V
max
)
Test duration: 1000 h
Temperature of air: 40
°C
Relative humidity of air: 93%
Duration: 56 days
Test according to IEC 60068-2-78
T
1
= T
op,min
(0 V), T
2
= T
op,max
(0 V)
Number of cycles: 5
Test duration: 30 min
Test according to IEC 60068-2-14, Test Na
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
Acceleration: 390 m/s
2
Pulse duration: 6 ms; 6
×
4000 pulses
Dry heat: T = T
op,max
(0 V)
Test duration: 16 h
Damp heat first cycle
Cold: T = T
op,min
(0 V)
Test duration: 2 h
Damp heat 5 cycles
Tests performed according to
IEC 60068-2-30
∆R
25
/R
25
< 25%
< 25%
< 10%
Rapid change
of temperature
IEC 60738-1
< 10%
Vibration
IEC 60738-1
< 5%
Shock
Climatic sequence
IEC 60738-1
IEC 60738-1
< 5%
< 10%
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 3 of 9
Switching applications
for electronic ballast
C1118, S1076
Cautions and warnings
General
EPCOS thermistors are designed for specific applications and should not be used for purposes
not identified in our specifications, application notes and data books unless otherwise agreed
with EPCOS during the design-in-phase.
Ensure suitability of thermistor through reliability testing during the design-in phase. The ther-
mistors should be evaluated taking into consideration worst-case conditions.
Storage
Store thermistors only in original packaging. Do not open the package before storage.
Storage conditions in original packaging: storage temperature 25
°C
... +45
°C,
relative hu-
midity
≤75%
annual mean, maximum 95%, dew precipitation is inadmissible.
Avoid contamination of thermistors surface during storage, handling and processing.
Avoid storage of thermistor in harmful environment with effect on function on long-term opera-
tion (examples given under operation precautions).
Use thermistor within the following period after delivery:
Through-hole devices (housed and leaded PTCs): 24 months
Motor protection sensors, glass-encapsulated sensors and probe assemblies: 24 months
Telecom pair and quattro protectors (TPP, TQP): 24 months
Leadless PTC thermistors for pressure contacting: 12 months
Leadless PTC thermistors for soldering: 6 months
SMDs in EIA sizes 3225 and 4032, and for PTCs with metal tags: 24 months
SMDs in EIA sizes 0402, 0603, 0805 and 1210: 12 months
Handling
PTCs must not be dropped. Chip-offs must not be caused during handling of PTCs.
Components must not be touched with bare hands. Gloves are recommended.
Avoid contamination of thermistor surface during handling.
Soldering (where applicable)
Use rosin-type flux or non-activated flux.
Insufficient preheating may cause ceramic cracks.
Rapid cooling by dipping in solvent is not recommended.
Complete removal of flux is recommended.
Standard PTC heaters are not suitable for soldering.
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 5 of 9
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