FUSE, THERMAL, 72°C, 10A, 250V

G4A01072C

Manufacturer Part NumberG4A01072C
DescriptionFUSE, THERMAL, 72°C, 10A, 250V
ManufacturerTHERMODISC
SeriesG4
G4A01072C datasheet
 


Specifications of G4A01072C

Voltage Rating Vac250VFuse Current10A
Fuse TerminalsFerruleFunctioning Temperature72°C
Holding Temperature47°CFuse Size14.7 X 4.0mm
Current Rating10AVoltage Rating250V
Lead Free Status / RoHS StatusLead free / RoHS Compliant  
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MICROTEMP
®
Thermal Cutoffs:
INTRODUCTION
Upper Limit Temperature Protection
MICROTEMP
®
thermal cutoffs from Therm-O-Disc offer an accurate, reliable solution to the need
for upper limit temperature protection. Known as a thermal fuse, thermal link, or TCO, the
®
MICROTEMP
thermal cutoff provides protection against overheating by interrupting an electrical
circuit when operating temperatures exceed the rated temperature of the cutoff.
MICROTEMP
®
Features:
• One-shot operation cuts off electrical power
• Current interrupt capacity up to 25 amps @ 250VAC
• Low resistance
• Compact size
Operating Principle of the MICROTEMP
The active trigger mechanism of the thermal cutoff is an exclusively formulated, electrically
nonconductive pellet. Under normal operating temperatures, the solid pellet holds spring-loaded
contacts closed.
When a predetermined temperature is reached, the pellet melts, allowing the compression spring
to relax. The trip spring then slides the contact away from the lead and the circuit is opened (see
figures 1 and 2).
®
After a MICROTEMP
thermal cutoff opens a circuit, the TCO needs to be replaced. This
replacement procedure must include correction of the fault condition before the product is
operated again.
®
TCO
135

G4A01072C Summary of contents

  • Page 1

    MICROTEMP ® Thermal Cutoffs: INTRODUCTION Upper Limit Temperature Protection MICROTEMP ® thermal cutoffs from Therm-O-Disc offer an accurate, reliable solution to the need for upper limit temperature protection. Known as a thermal fuse, thermal link, or TCO, the ® MICROTEMP ...

  • Page 2

    MICROTEMP G4, G6 & G7 Series TCO Before Operation THERMAL PELLET COMPRESSION SPRING TRIP SPRING CERAMIC BUSHING EPOXY SEAL Grey area shows current path MICROTEMP ® G5 & G8 Series TCO Before Operation THERMAL PELLET COMPRESSION SPRING TRIP SPRING ...

  • Page 3

    MICROTEMP Thermal Cutoffs: TYPES & SPECIFICATIONS MICROTEMP ® thermal cutoffs are available in a range of temperatures and electrical ratings to meet application requirements (see figure 3). There are five primary types of thermal cutoffs available. Standard dimensions of ...

  • Page 4

    MICROTEMP ® TCO Operating Temperature Summary Max. Holding Open Temp Temp T T ° °C °C G4 Series f 072 47 100 077 52 125 084 59 125 093 68 140 098 73 140 104 79 150 ...

  • Page 5

    Packaged Thermal Cutoffs Therm-O-Disc also offers a variety of packaging options for MICROTEMP Therm-O-Disc offers two standard packages with wide application in the HVAC industry. Primarily designed for heating applications, the GXAM04 and GXAM06 packages mount a standard G4 or ...

  • Page 6

    Lead Configurations The MICROTEMP ® TCO can be furnished with virtually any lead configuration specified for an application. Lead curls are available to match most sizes of screws along with varying lead lengths and lead forms. All types of terminations, ...

  • Page 7

    Lead Cutting Minimum Dimensions Inches (millimeters) ` Dimension A Dimension B 0.95 (24.2) 0.22 (5.6) Tape and Reel Packaging Dimensions – Inches (millimeters) ` Item Dim. A Dim. B GXAA0900TTTC 1.66 (42.1) 2.80 (71.1) G7FA0900TTTC 1.66 (42.1) 2.80 (71.1) 0.031(0.8) ...

  • Page 8

    Product Nomenclature ® MICROTEMP TCO (G – Global, Y – Non Agency, R – Regional) Z – Internal construction ® MICROTEMP TCO Packages G – Rating type (G – Global, Y-Non Agency) Z – Internal construction ( ...

  • Page 9

    MICROTEMP ® Thermal Cutoffs: TECHNICAL DATA MICROTEMP ® thermal cutoffs, available in a variety of standard and custom configurations, pro- vide reliable one-shot, over-temperature protection in a wide range of applications. Performance can be affected by installation method and proper ...

  • Page 10

    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 ...

  • Page 11

    TEMPERATURE OR VOLTAGE MEASURING DEVICE THERMOCOUPLE CONNECTNG CONDUIT WIRE Figure 9 illustrates a typical installation of a thermocoupled cutoff. Note that the body of the thermal cutoff is at the same potential as the connecting circuit; therefore, it must be ...

  • Page 12

    The product and application being tested will determine the ...

  • Page 13

    Substitute actual thermal cutoffs in a sufficient number of finished products and re-run the tests to obtain statistical verification of the results. For multiple TCO applications, test functional thermal cutoffs under fault conditions so that the product overheats and each ...

  • Page 14

    Test samples should be x-rayed before and after the soldering operation. The size of the chemical pellet should be measured with an optical comparator or a toolmaker’s microscope to verify that no shrinkage has occurred during the soldering operation (see ...

  • Page 15

    Splices & Terminals Insecure splices and terminations may produce high resistance junctions which can cause self 2 heating ( power is dissipated across these junctions during product operation. Heat from these hot spots can flow down the thermal ...

  • Page 16

    Thermal Gradients Ideal TCO placement subjects the entire TCO case, leads, epoxy seal and internal components to a uniform temperature environment. Care should be exercised in the placement of the TCO to minimize thermal gradients across the TCO body. In ...

  • Page 17

    CAUTION . . . The thermal cutoff may fail to open the electrical circuit under certain conditions. Distortion of the case, breaking or cracking the seal, exposing the epoxy seal to cleaning solvents, compression of the leads and current surges ...

  • Page 18

    Agency Recognition MICROTEMP ® thermal cutoffs are recognized by the following major agencies: UL BEAB Underwriters British Laboratories Inc. Electrotechnical (USA) Approvals Board MICROTEMP ® thermal cutoffs are recognized by the major approval agencies throughout the world for AC circuit ...