PTC307C Series
Vishay Cera-Mite
PTC Thermistors Motor Start Pellets
FEATURES
•
Rugged silver electrodes well suited for long life
OEM pressure contact mounting
•
Various pellet sizes for optimum inrush current
and switching time
•
Withstanding voltage is 2 times the maximum voltage
rating
•
UL approved pellets
•
Compliant to RoHS directive 2002/95/EC
APPLICATIONS
•
Single Phase motorstart assist in
- Refrigerator systems
- Airconditioning systems
PARAMETER
VALUE
UNIT
Ω
QUICK REFERENCE DATA
- Heat-pumps
- Small compressors
•
Inrush current generation
Resistance value at 25 °C
3.3 to 75
Tolerance on resistance value
± 30
%
DESCRIPTION
These directly heated thermistors have a positive
temperature coefficient and are primarily intended for inrush
current generation. They consist of a high grade ceramic disk
with two rugged pattern silver electrodes for contact pressure
mounting. These ceramic pellets can be build into proprietary
motor start devices for compressor, refrigerator and HVAC
OEMs.
Current ratings
4 to 16
A
RMS
Switching times (typical)
0.25 to 1.0
s
Maximum voltage rating
160 to 450
V
RMS
Operating temperature range
- 10 to + 85
°C
MOUNTING
The PTC thermistor pellets are suitable for pressure contact
mounting in application specific housing assemblies.
Examples of such assemblies can be found in the PTC305C
series. Assembly housing must be appropriate for usage up
to 180 °C surface temperature of the PTC pellets.
The pellets are not solderable.
Storage temperature range
- 25 to + 105
°C
MARKING
The pellets are not marked. Marking is available on request
for customized parts.
SAFETY AGENCY RECOGNITION
Vishay Cera-Mite motor start PTC pellet thermistors are
recognized by Underwriter Laboratories file E148885 in
accordance with Standard for Thermistor Type Devices
UL 1434; and Canadian Standards C22.2 No. 0-1991.
www.vishay.com
1
For technical questions, contact:
ceramitesupport@vishay.com
Document Number: 22998
Revision: 11-Aug-10
PTC307C Series
PTC Thermistors Motor Start Pellets
Vishay Cera-Mite
ELECTRICAL DATA AND ORDERING INFORMATION
PART NUMBER
PTC307C1674P
PTC307C1700P
PTC307C1711P
PTC307C1668P
PTC307C1644P
PTC307C1651P
PTC307C1720P
PTC307C1411P
PTC307C1484P
PTC307C1544P
PTC307C1399P
PTC307C1489P
PTC307C1476P
PTC307C1530P
PTC307C1531P
PTC307C1282P
PTC307C1533P
PTC307C1292P
PTC307C1487P
PTC307C1529P
PTC307C1545P
PTC307C1640P
PTC307C1740P
PTC307C1024P
PTC307C1409P
PTC307C1410P
R
25 (1)
± 30 %
(Ω)
5.0
6.8
10
5.0
6.8
10
20
3.3
4.7
5.6
6.8
10
12
15
22
33
47
68
3.9
12
14
30
30
38
50
75
R
DYN (2)
(Ω)
4.0
5.0
7.2
4.0
5.0
7.2
13
2.6
3.5
4.1
5.0
7.2
8.5
10.5
15
22
30
42
3.0
10.3
12
15.9
15.9
25
35
50
V
meas.
R
DYN
(V
RMS
)
120
120
120
120
120
120
120
120
120
120
120
120
120
120
120
120
120
120
50
100
100
240
240
240
240
240
MAX.
VOLTAGE
(3)
(V
RMS
)
200
200
200
180
200
200
320
160
180
180
200
230
250
300
400
355
400
430
175
350
320
380
450
400
400
400
MAX.
CURRENT
(A
RMS
)
10
10
10
12
10
10
8
12
12
12
10
9
8.5
8
8
6
5
4
16
8
8
12
7
9
7.5
5.5
SIZE
ØxT
(mm)
16 + 0.2/- 0.4
x 2.5 ± 0.25
UL
(4)
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
T
switch
(°C)
105
105
105
120
120
120
120
120
120
120
120
120
120
120
120
120
120
120
120
120
120
120
120
120
120
120
17.5 ± 0.3
x 2.5 ± 0.25
20 + 0.2/- 0.8
x 2.5 ± 0.25
20 + 0.2/- 0.8
x 3.2 ± 0.25
20 + 0.2/- 0.8
x 5.0 ± 0.25
Notes
(1)
R
= zero power resistance measured at < 0.5 V , standard tolerance ± 30 %, other tolerances and values on request.
25
DC
(2)
R
DYN
= nominal dynamic resistance during inrush, measured with V
meas.
applied, for information only.
(3)
The maximum voltage is the voltage that appears across the PTC in a motor start application. This is not the applied line voltage.
Withstanding voltage of all UL approved types is minimum twice the specified maximum operating voltage.
(4)
UL recoginition following XGPU2 category of standard UL1434, file E148885.
TYPICAL PTC CURRENT VS. TIME SHOWING DEFINITION OF
R
DYN
AND SWITCH TIME (t)
Peak current
V
meas.
I
PTC
max.
Switch time t
≈
R
DYN
=
h x V x (T
switch
- T
0
)
PTC Resistance (Ω)
I
2PTC
x
R
DYN
10 000
Current
10.0
I
PTC
(A
RMS
)
(Normalized)
h = Specific heatcapacity = 2.3 J/Kcm
3
T
0
= PTC temp. at time 0
V = PTC volume in cm
3
(D/2)
2
Tπ
1000
1.0
100
Switch time (t)
Resistance
0.1
20 % peak current
0
0.1
Motor contactor
closes
Switch time (t)
0.2
0.3 0.4 0.5 0.6 0.7 0.8
Time to Switch (s)
PTC switchout
Solid ceramic disc
10
50
100
PTC Temperature °C
150
0.01
Base electrode
D
Silver electrode
T
Document Number: 22998
Revision: 11-Aug-10
for technical questions, contact:
ceramitesupport@vishay.com
www.vishay.com
2
PTC Current (A
RMS
)
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
applications or for any other application in which the failure of the Vishay product could result in personal injury or death.
Customers using or selling Vishay products not expressly indicated for use in such applications do so at their own risk and agree
to fully indemnify and hold Vishay and its distributors harmless from and against any and all claims, liabilities, expenses and
damages arising or resulting in connection with such use or sale, including attorneys fees, even if such claim alleges that Vishay
or its distributor was negligent regarding the design or manufacture of the part. Please contact authorized Vishay personnel to
obtain written terms and conditions regarding products designed for such applications.
No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document or by
any conduct of Vishay. Product names and markings noted herein may be trademarks of their respective owners.
Material Category Policy
Vishay Intertechnology, Inc. hereby certifies that all its products that are identified as RoHS-Compliant fulfill the
definitions and restrictions defined under Directive 2011/65/EU of The European Parliament and of the Council
of June 8, 2011 on the restriction of the use of certain hazardous substances in electrical and electronic equipment
(EEE) - recast, unless otherwise specified as non-compliant.
Please note that some Vishay documentation may still make reference to RoHS Directive 2002/95/EC. We confirm that
all the products identified as being compliant to Directive 2002/95/EC conform to Directive 2011/65/EU.
Revision: 12-Mar-12
1
Document Number: 91000
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