FUSE, THERMAL, 167°C, 10A, 250V

G4A01167C

Manufacturer Part NumberG4A01167C
DescriptionFUSE, THERMAL, 167°C, 10A, 250V
ManufacturerTHERMODISC
SeriesMICROTEMP
G4A01167C datasheet
 


Specifications of G4A01167C

Voltage Rating Vac250VFuse Current10A
Fuse TerminalsFerruleFunctioning Temperature167°C
Holding Temperature142°CLead Free Status / RoHS StatusLead free / RoHS Compliant
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Calibration Temperature
It is necessary to select a thermal cutoff rating above the maximum temperature experienced during
normal operation, including expected short-term temperature overshoots. The temperatures
experienced by the thermal cutoff during normal operation will determine the life expectancy for
the thermal cutoff. If the thermal cutoff rating is too close to the temperature experienced during
normal operation (including overshoot temperatures after opening of a thermostat, etc.), the
probability of a nuisance trip increases.
Nuisance trips are caused by pellet shrinkage due to repeated operation at temperatures near but
below calibration temperature, or excessive thermal gradients across the case of the TCO and its
leads (see “Thermal Gradients”). More information on nuisance tripping due to pellet aging is
available in U.L. Standard 1020, under the section on Thermal Element Stability Test. Therm-O-Disc
®
has compiled standard life curves by subjecting MICROTEMP
thermal cutoffs to very controlled
temperatures for extended time periods under ideal laboratory conditions. Therefore, these
standard life curves should be used only as a guideline.
Comparison of measured temperatures to MICROTEMP
®
thermal cutoff standard life curves should
not replace customer life testing using functional thermal cutoffs for the particular application.
The design engineer must make the trade-off between response and life of the TCO based on
product requirements. It is important to remember that temperatures experienced in actual
application will vary from unit to unit.
Test Procedure
Install the dummy cutoff in the electrical circuit to be opened in the event of a fault condition.
Position it in the area that has been selected to be protected within the product based on prior
determinations of the maximum permissible temperatures to be allowed. The dummy cutoff
should be installed using the same mounting and electrical connection that will be used for
functional TCOs in production. Connect the thermocouple leads to a digital temperature
measuring device to record temperatures. The product to be protected can now be operated,
and the normal operating temperature monitored. Note that the thermal cutoff dummy is not a
functional TCO and therefore will not open the circuit in the test setup.
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