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SF240 Datasheet(PDF) 6 Page - NEC

Part No. SF240
Description  ORGANIC THERMAL SENSITIVE PELLET TYPE 10 AMPERES RATED CURRENT
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Maker  NEC [NEC]
Homepage  http://www.nec.com/
Logo NEC - NEC

SF240 Datasheet(HTML) 6 Page - NEC

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6
SF/E SERIES
Cautions
This section describes cautions designed to protect the performance of the thermal cutoff, Be sure to read and
fully understand these cautions.
To obtain full performance from the thermal cutoff, it is necessary for the customer to appropriately store
the thermal cutoff, design appropriate circuits for the application, and perform evaluations, mounting and
testing as necessary. Problems arising from the inappropriate execution of the above are the responsibility
of the customer, and NEC declines any and all responsibility.
Design Cautions
q
Do not use this device for any purpose other than as a thermal cutoff.
The thermal cutoff is designed to detect abnormal rises in temperature and break circuits if needed. It is not
a current fuse that cuts excess current. If used as a current fuse, the SEFUSE may malfunction.
q
Do not use this device in aerospace equipment, aeronautical equipment, nuclear reactor control systems, Iife
support equipment or systems, transportation machinery engine control or safety-related equipment.
This device is designed for use in household electric appliance, office automation equipment, audio and video
equipment, computer communications equipment, test and measurement equipment, personal electronic
equipment and transportation equipment (excluding engine control).
q
The customer should select the proper thermal cutoff device, mounting location, and mounting method as
appropriate for each application.
Verify whether the chosen selections are appropriate by repeatedly testing the final design for thermal cutoff
under normal conditions as well as under predicted maximum abnormal conditions.
q
Make designs so that the temperature of the body of the thermal cutoff does not exceed the temperatures
shown in Table 1.
If, the temperature is exceeded on a regular basis, the thermal cutoff may start operating only at temperatures
lower than the normal operating temperature. Malfunctions may also occur. Even if the thermal cutoff's
operating temperature is exceeded, it may malfunction.
Table 1.
Type
SF 70E
SF 76E
SF 91E
SF 96E
SF109E
SF119E
SF129E
SF139E
SF152E
SF169E
SF188E
SF214E
SF226E
SF240E
Body
Temperature
50˚C
56˚C
71˚C
76˚C
89˚C
99˚C
109˚C
119˚C
132˚C
140˚C
140˚C
140˚C
140˚C
140˚C


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