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9
307C Motorstart Thermistors
Vishay Cera-Mite
Document Number: 23087
Revision 14-May-02
ceramite.support@vishay.com
PTCR Motor Start Pellets
APPLICATION DATA
• Complete range of size/resistance combinations for 120 and 240 volt
compressor motors.
• Rugged silver electrodes well suited for long life pressure contact
mounting.
• Withstand voltage is 2 times Voltage Max. rating.
• Application engineering assistance provided for custom
pellet designs.
RESISTANCE
VOLTAGE CURRENT DIAMETER (D) x
MAX. MAX. THICKNESS (T) PART
R
25
(OHMS) R
DYN
(OHMS)
(V
RMS
)(A
RMS
) (mm) NUMBER
5 4 200 10 16 x 2.5 307C1674*
5.5 4.2 180 12 16 x 2.5 307C1670
6.8 5 200 10 16 x 2.5 307C1700*
8 5.8 150 10 16 x 2.5 307C1280
10 7.2 200 10 16 x 2.5 307C1711*
10 7.2 200 10 16 x 2.5 307C1713
20 13.5 250 7.5 16 x 2.5 307C1490
47 30 300 6.5 16 x 2.5 307C1136
68 42 300 5.5 16 x 2.5 307C1043
4 3.2 180 15 17.5 x 2.5 307C1614
5 4 180 12 17.5 x 2.5 307C1668
6.8 5 200 10 17.5 x 2.5 307C1644
10 7.2 200 10 17.5 x 2.5 307C1651
15 10.5 265 6 17.5 x 2.5 307C1190
20 13 320 8 17.5 x 2.5 307C1720
25 17 300 7.5 17.5 x 2.5 307C1066
33 22 300 6.5 17.5 x 2.5 307C1040
47 30 350 4 17.5 x 2.5 307C1284
68 42 400 4 17.5 x 2.5 307C1283
3.3 2.6 160 12 20 x 2.5 307C1411
4.7 3.5 180 12 20 x 2.5 307C1484
5.6 4.1 180 12 20 x 2.5 307C1544
6.8 5 200 10 20 x 2.5 307C1399
10 7.2 230 9 20 x 2.5 307C1489
12 8.5 250 8.5 20 x 2.5 307C1476
15 10.5 300 8 20 x 2.5 307C1530
22 15 400 8 20 x 2.5 307C1531
33 22 355 6 20 x 2.5 307C1282
47 30 400 5 20 x 2.5 307C1533
68 42 430 4 20 x 2.5 307C1292
3.9 3 (@ 50V) 175 16 20 x 3.2 307C1487
12 10.3 (@ 100V) 350 8 20 x 3.2 307C1529
14 12 (@ 100V) 350 8 20 x 3.2 307C1545
30 15.9 (@ 240V) 380 12 20 x 3.2 307C1640
25 18 (@ 240V) 400 9 20 x 5.0 307C1518
38 25 (@ 240V) 400 9 20 x 5.0 307C1024
50 35 (@ 240V) 400 7.5 20 x 5.0 307C1409
75 50 (@ 240V) 400 5.5 20 x 5.0 307C1410
R25

= zero power resistance ± 30% at 25°C; other tolerances available.
RDYN = nominal dynamic (effective) resistance, 120V applied unless otherwise noted.
*High performance ceramic formulation, lower transition temperature provides reduced
power consumption for energy concious applications.
Note: All motor start pellets receive 100% resistance and 100% voltage pulse burn-in
simulating actual motor start-up.
Note: Selected pellets carry UL recognition per File E107611.
Note: Usage requires packaging materials appropriate for maximum pellet surface
temperature of 180°C.
Motor Start Relays
Combination Assemblies
Vishay Cera-Mite offers a complete line of PTCR
motor start pellets designed for OEM pressure
contact mounting. Compressor and refrigerator
manufacturers, as well as selected HVAC after-
market distributors have chosen to design and
build their own proprietary motor start devices.
Such cost effective units allow for unique mounting
styles, special terminal arrangements, and
combination devices including start capacitors or
overload protectors.
PTCR MOTOR START PELLETS
FOR USE IN:
SOLID CERAMIC
DISC
BASE
ELECTRODE
SILVER
ELECTRODE
T
D