PTCLL
www.vishay.com
Vishay BCcomponents
PTC Thermistors, Time Delay for Lighting
FEATURES
• Reliable lamp starting, due to well defined
inrush-current generated time delay
• Accurate resistance for ease of circuit design
• Small size and durable
• Available bulk-packed or taped-on-reel
• Long life: More than 20 000 starts for a 20 W
CFL lamp
QUICK REFERENCE DATA
PARAMETER
Rated voltage (RMS)
Nominal switching current
Resistance at 25 °C (R
25
)
Tolerance on
R
25
value
Maximum overload current I
ol
Tripping time
Operating temperature range
at rated voltage
VALUE
80 to 200
150 to 500
100 to 625
20 to 30
0.5 to 1.0
0.3 to 1
-20 to 105
UNIT
V
RMS
mA
Ω
%
A
s
°C
• Material categorization: for definitions of compliance
please see
www.vishay.com/doc?99912
APPLICATIONS
Fluorescent lighting and lighting ballasts for:
• CFL 5 to 25 W range
• TL HF-ballasts
DESCRIPTION
Positive temperature coefficient (PTC) thermistors for
overload protection have proved to be the ideal electronic
ballast component for increased lamp life-time.
When the rectified mains is first applied, the PTC thermistor
is cold, so its resistance is low. The lamp voltage will be
below the necessary ignition value, so the current will flow
through the cathodes, heating them to their emission
temperature. At the same time, the PTC thermistor will heat
up to its switch temperature, whereupon its resistance will
rise rapidly, allowing the lamp voltage to reach its ignition
value and light the lamp.
Once the lamp is lit, the cathodes are fed by a
high-frequency lamp supply, to avoid flicker and improve
efficiency. The PTC thermistor plays no further part until the
lamp is switched off, whereupon it is ready to resume its
smooth-starting function.
We supply a range of lighting PTC thermistors for this
application offering a wide choice of voltage and switch
times.
MOUNTING
The leads are suitable for soldering in any position. The
lacquer may cover the leads up to 1.0 mm from the seating
plane.
ELECTRICAL DATA AND ORDERING INFORMATION
R
25
(Ω)
MIN.
500
185
75
225
75
MAX.
750
300
125
375
125
SWITCH
TEMPERATURE
(°C)
≈
110
≈
120
≈
80
≈
105
≈
105
MAXIMUM
PEAK VOLTAGE
(4)
(V
peak
)
700
700
700
900
1 000
TYPICAL
(1)
TRIP TIME at 25 °C
t
trip
at I
t
(s)
(mA)
0.4
200
0.5
300
0.7
300
0.75
300
0.85
500
CATALOG NUMBER
SAP CODING
PTCLL05P131TBE
(2)
PTCLL05P211TTE
(2)
PTCLL05P251TTE
(2)
PTCLL07P261VTE
(3)
PTCLL07P421WTE
(3)
Notes
(1)
Ignition time of the lamp approximately equals the tripping time.
(2)
Specific for CFL lamp electronic starter.
(3)
Specific for HF-TL ballast.
(4)
Highest lamp ignition voltage should be smaller than the maximum allowable peak voltage.
Revision: 30-Nov-15
Document Number: 29071
1
For technical questions, contact:
nlr@vishay.com
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT
www.vishay.com/doc?91000
PTCLL
www.vishay.com
Vishay BCcomponents
TYPICAL ELECTRONIC BALLAST CIRCUIT
C
Rectified mains
(310 V
DC
for
230 V
AC
mains)
C
Fluorescent
lamp
Cathode Cathode
FET
switch
L
36 kHz
lamp
supply
C
FET
switch
PTC Thermistor
DIMENSIONS
in millimeters
D
T
D
P
P
P
h
T
h
H
3
H
3
H
2
L
d
W
2
W
0
W
1
W
H
0
H
1
H
2
F
L
1
d
P
0
P
1
F
T
D
0
t
D
max.
5.4
5.4
5.4
7.0
7.0
T
max.
4.5
4.5
4.5
5.0
5.0
H
3
10
9
10
12
12
L
1
3.5 ± 0.5
-
-
-
-
WEIGHT
(g)
≈
0.33
≈
0.45
≈
0.45
≈
0.66
≈
0.66
FIGURES
Fig. 1
Fig. 2
Fig. 2
Fig. 2
Fig. 2
PACKAGING
Bulk
On tape
On tape
On tape
On tape
SPQ
500
1500
1500
1500
1500
MATERIAL ORDERING
NUMBER
PTCLL05P131TBE
PTCLL05P211TTE
PTCLL05P251TTE
PTCLL07P261VTE
PTCLL07P421WTE
TAPE AND OTHER DEVICE DIMENSIONS
in millimeters according IEC 60286 for tape on reel
SYMBOL
d
P
F
H
2
H
0
PARAMETER
Lead diameter
Pitch between thermistors
Lead to lead distance guaranteed between component and tape
Component body to seating plane
Lead-wire clinch height
DIMENSIONS
0.6
12.7
5
4
16
TOLERANCE
± 0.05
±1
+0.5 / -0.2
±
1
±
0.5
Revision: 30-Nov-15
Document Number: 29071
2
For technical questions, contact:
nlr@vishay.com
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT
www.vishay.com/doc?91000
Legal Disclaimer Notice
www.vishay.com
Vishay
Disclaimer
ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE TO IMPROVE
RELIABILITY, FUNCTION OR DESIGN OR OTHERWISE.
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“Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained in any datasheet or in any other
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statements about the suitability of products for a particular application. It is the customer’s responsibility to validate that a
particular product with the properties described in the product specification is suitable for use in a particular application.
Parameters provided in datasheets and / or specifications may vary in different applications and performance may vary over
time. All operating parameters, including typical parameters, must be validated for each customer application by the customer’s
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including but not limited to the warranty expressed therein.
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© 2017 VISHAY INTERTECHNOLOGY, INC. ALL RIGHTS RESERVED
Revision: 08-Feb-17
1
Document Number: 91000
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