G4A01216C THERMODISC, G4A01216C Datasheet - Page 10

• Manufacturer Part Number: G4A01216C
• Description: Thermal Fuse
• Manufacturer: THERMODISC
• Series: MICROTEMPr

Specifications of G4A01216C

• Voltage Rating Vac: 250V
• Fuse Current: 10A
• Fuse Terminals: Axial Leaded
• Functioning Temperature: 216°C
• Holding Temperature: 200°C
• Length/height, External: 14.7mm
• Voltage Ac: 250V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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”).
®
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 tempera-
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tures 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 Thermocoupled TCO Test Sample (TTTS) 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 TTTS 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 TTTS is not a
functional TCO and therefore will not open the circuit in the test setup.
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