PTCSL20 Series
www.vishay.com
Vishay BCcomponents
PTC Thermistors, Mini Radial Leaded
for Over-Temperature Protection
FEATURES
Well-defined protection temperature levels
Fast reaction time (< 15 s in still air)
Accurate resistance for ease of circuit design
Excellent long term behavior (< 1 °C or 5 % after
1000 h at T
n
+15 °C)
• Wide range of protection temperatures
(70 °C to 150 °C)
• Small size and rugged
• Material categorization: for definitions of compliance
please see
www.vishay.com/doc?99912
•
•
•
•
Non preferred type
(replaced by PTCSL03)
QUICK REFERENCE DATA
PARAMETER
VALUE
UNIT
20 to 100
Ω
Resistance at 25 °C (R
25
)
Nominal working temperature
70 to 150
°C
(T
n
)
Tolerance on T
n
±5
°C
Maximum voltage (AC or DC)
30
V
(1)
-20 to 165
°C
Operating temperature range
Dissipation factor
5
mW/K
Storage temperature
-25 to +155
°C
Note
(1)
Max operating temperature range is T +15 °C, indicated value
n
is for T
n
= 150 °C.
APPLICATIONS
Over-temperature protection and control in:
• Industrial electronics
• Power supplies
• Motor protection
DESCRIPTION
These PTC sensing thermistors consist of a medium
resistivity doped BaTiO3 ceramic chip lead (Pb)-free
soldered with nickel wires and coated with a high
temperature silicone lacquer and color coding band.
PACKAGING
PTC thermistors are available in 500 pieces bulk packed.
COMPONENT OUTLINES DIMENSIONS
in millimeters
3.5 max.
3.0 max.
0.5 min.
7.0 max.
L
2.5
Ø 0.4
PTCSL20T..., L = 20 ± 2
PTCSL40T..., L = 40 min.
NOMINAL WORKING TEMPERATURES AND ORDERING INFORMATION
RESISTANCE
NOMINAL
RESISTANCE
RESISTANCE
from -20 °C to
WORKING TEMP.
at T
n
+5 °C
at T
n
-5 °C
T
n
-20 °C
T
n
(Ω)
(kΩ)
(Ω)
(°C)
70
20 to 250
50 to 570
0.570 to 50
80
20 to 250
50 to 550
1.33 to 50
90
20 to 250
50 to 550
1.33 to 50
100
20 to 250
50 to 550
1.33 to 50
110
20 to 250
50 to 550
1.33 to 50
120
20 to 250
50 to 550
1.33 to 50
130
20 to 250
50 to 550
1.33 to 50
140
20 to 250
50 to 550
1.33 to 50
150
20 to 250
50 to 550
1.33 to 50
Note
(2)
Parts with total length of 40 mm available as PTCSL40T...DBE catalog numbers.
Revision: 04-Dec-15
MIN.
RESISTANCE
at T
n
+15 °C
(kΩ)
4
4
4
4
4
4
4
4
4
COLOR
CODE
Black
Brown
Red
Orange
Yellow
Green
Blue
Violet
Grey
ORDERING PART
NUMBERS
(2)
PTCSL20T071DBE
PTCSL20T081DBE
PTCSL20T091DBE
PTCSL20T101DBE
PTCSL20T111DBE
PTCSL20T121DBE
PTCSL20T131DBE
PTCSL20T141DBE
PTCSL20T151DBE
Document Number: 29012
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
PTCSL20 Series
www.vishay.com
TYPICAL RESISTANCE/TEMPERATURE
CHARACTERISTIC
for T
n
100 °C to 120 °C
10
6
1.5 V (DC) max.
Vishay BCcomponents
TYPICAL RESISTANCE/TEMPERATURE
CHARACTERISTIC
for T
n
70 °C to 90 °C
10
6
1.5 V (DC) max.
10
5
Tn = 100 °C
10
5
Tn = 110 °C
Tn = 120 °C
Resistance ()
10
4
Resistance ()
10
4
10
3
10
3
10
2
10
2
T
n
= 90
°C
T
n
= 80
°C
T
n
= 70
°C
10
0
50
100
150
200
250
Temperature (°C)
10
0
50
100
150
Temperature (°C)
200
250
TYPICAL RESISTANCE/TEMPERATURE
CHARACTERISTIC
for T
n
130 °C
10
6
1.5
V
(DC) max.
TYPICAL RESISTANCE/TEMPERATURE
CHARACTERISTIC
for T
n
140 °C and 150 °C
10
6
1.5
V
(DC) max.
10
5
10
5
Resistance (Ω)
10
3
Resistance (Ω)
10
4
10
4
10
3
10
2
10
2
Tn = 150 °C
Tn = 130 °C
Tn = 140 °C
10
10
0
50
100
150
200
250
Temperature (°C)
0
50
100
150
200
250
Temperature (°C)
Revision: 04-Dec-15
Document Number: 29012
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
PTCSL20 Series
www.vishay.com
APPLICATION SPECIFIC DATA
Negative Temperature Coefficient (NTC) thermistors are well known for temperature sensing. What is not well known, however,
is that Positive Temperature Coefficient (PTC) thermistors can be used for thermal protection. Although their operating
principles are similar, the applications are very different; whereas NTC thermistors sense and measure temperature over a
defined range, PTC thermistors switch at one particular temperature.
Just like thermostats they protect such equipment and components as motors, transformers, power transistors and thyristors
against over temperature. A PTC thermistor is less expensive than a thermostat, and its switch temperature can be more
accurately specified. It is also smaller and easier to design-in to electronic circuitry.
So how does it work? The PTC thermistor is mounted in thermal contact with the equipment to be protected, and connected
into the bridge arm of a comparator circuit, such as shown in Fig. 1. At normal temperature, the PTC thermistor resistance (R
p
)
is lower than R
s
(see Fig. 2), so the comparator’s output voltage V
O
will be low. If an equipment over temperature occurs, the
PTC thermistor will quickly heat up to its trigger or nominal reference temperature T
n
, whereupon its resistance will increase to
a value much higher than R
s
, causing V
O
to switch to a high level sufficient to activate an alarm, relay or power shutdown circuit.
Vishay BCcomponents
APPLICATION EXAMPLES
V
O
R1
R
s
R
L
R
p
> R
s
(R1 = R2)
V
O
R
f
R2
+
PTC
thermistor
R
p
R
p
< R
s
(R1 = R2)
Trigger
temperature
T
n
T (°C)
Fig. 1 - Typical Comparator Circuit
Fig. 2 - Typical Switch Characteristic
+
θ
+
θ
+
θ
As
soon
as one or more of the windings becomes too hot, the
motor is
switched
off.
Fig. 3 - Temperature Protection of 3-phase electric motor
Revision: 04-Dec-15
Document Number: 29012
3
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.
Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively,
“Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained in any datasheet or in any other
disclosure relating to any product.
Vishay makes no warranty, representation or guarantee regarding the suitability of the products for any particular purpose or
the continuing production of any product. To the maximum extent permitted by applicable law, Vishay disclaims (i) any and all
liability arising out of the application or use of any product, (ii) any and all liability, including without limitation special,
consequential or incidental damages, and (iii) any and all implied warranties, including warranties of fitness for particular
purpose, non-infringement and merchantability.
Statements regarding the suitability of products for certain types of applications are based on Vishay’s knowledge of
typical requirements that are often placed on Vishay products in generic applications. Such statements are not binding
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
technical experts. Product specifications do not expand or otherwise modify Vishay’s terms and conditions of purchase,
including but not limited to the warranty expressed therein.
Except as expressly indicated in writing, Vishay products are not designed for use in medical, life-saving, or life-sustaining
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Customers using or selling Vishay products not expressly indicated for use in such applications do so at their own risk.
Please contact authorized Vishay personnel to obtain written terms and conditions regarding products designed for
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© 2017 VISHAY INTERTECHNOLOGY, INC. ALL RIGHTS RESERVED
Revision: 08-Feb-17
1
Document Number: 91000
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