TCO Axial Leaded Pallet Thermal Fuse

Product Description

TCO Axial Leaded Pallet Thermal Fuse

TCO Thermal Cutoffs Fuse Axial Leaded BF Pallet Thermal Fuse 10A 250V 73 to 257 Degree

Pallet Thermal Fuse 10A 250V provides protection for your electrical appliances by interrupting the circuit if the operating temperature is exceeded. The fuse features rigid connections and is suitable for surface or panel mounting applications.

Description Of TCO Axial Leaded Pallet Thermal Fuse

Metal thermal fuse (thermal cut off, temperature fuse) which use heat sensitive grain materials (organic chemical) as heat sensitive material.

Function is to cut off the circuit of appliances when temperature exceed specified TF value because of unexpected fault.

Widely used in electric current provider, power switch, computer, telephone, home appliance, communication products, all kinds of instrument and electronic and electric components, motor and all kinds of small home appliance such as electric iron, thermoelectric blower, microwave oven, refrigerator etc as heat protection, etc.

Features Of TCO Axial Leaded Pallet Thermal Fuse

Axial leaded

Body dimensions: 4 x 11mm (Diameter x Length)

Rigid wire connections

Ratings: 10A 250VAC

Globally certified temperatures and electrical loads
One-shot operation cuts off electrical power
Low resistance
Compact size
RoHS compliant

Operating Principle Of TCO Axial Leaded Pallet Thermal Fuse

The active trigger mechanism of the thermal fuse 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. After the thermal fuse opens a circuit, the fuse needs to be replaced. This replacement procedure must include correction of the fault condition before the product is operated again.

Benefits Of TCO Axial Leaded Pallet Thermal Fuse

• The industry standard for over-temperature protection
• Available in a wide range of temperatures to offer design flexibility in your application
• Available in mounted and packaged designs

Applications Of TCO Axial Leaded Pallet Thermal Fuse

• Portable Appliance
• Major Appliance
• HVAC
• Power Supplies
• Water Heater
• Other

Dimensional Drawing Of TCO Axial Leaded Pallet Thermal Fuse (mm)

Specification Of TCO Axial Leaded Pallet Thermal Fuse

Agency Approvals Of TCO Axial Leaded Pallet Thermal Fuse

○   pending

Application of Thermal FusesTCO Axial Leaded Pallet Thermal Fuse

Thermal cutoffs, available in a variety of standard and custom configurations, provide reliable one-shot, over-temperature protection in a wide range of applications. Performance can be affected by installation method and location of the thermal cutoff. Both application and installation is important in the overall performance of the product, and thorough testing is necessary for both AC and DC applications. The following guidelines will answer most questions concerning these two subjects.

General Considerations

Location

Sufficient time and effort must be used to determine the proper and most desirable location for a thermal fuse. The employment of infrared thermography, or a sufficient number of thermocouples to identify the highest temperature areas in the application during normal operation and fault conditions, should be considered. The location that provides the largest differential between these two conditions is generally most desirable.

Calibration Temperature

It is necessary to select a thermal fuse rating above the maximum temperature experienced by the thermal fuse during normal operation, including expected short-term temperature overshoots. The temperatures experienced by the thermal fuse during normal operation will determine the life expectancy of the thermal fuse. If the thermal fuse rating is too close to the temperature experienced during normal operation (including overshoot temperature 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). The design engineer must make the decision 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.

Thermal Gradients

Ideal thermal fuse placement subjects the entire thermal fuse case, leads, epoxy seal and internal components to a uniform temperature environment. Care should be exercised in the placement of the thermal fuse to minimize thermal gradients across the thermal fuse body. In certain applications, the thermal fuse can be mounted in a position where heat is conducted to the body of the thermal fuse through one of the leads, resulting in thermal gradients across the thermal fuse. Over time, the thermal fuse life can be reduced by thermal gradients if the isolated (epoxy) lead is at a consistently lower temperature than the Application of Thermal Fuses 17 case lead. Long term testing is recommended in determining whether these conditions exist in the application. To minimize the effects of thermal gradients and the temperature increase of the TCO body from this heat fl ow, attach the isolated (epoxy) lead, rather than the case lead, to the heat source. Thermocoupled fuses can be supplied with the thermocouples on both ends to facilitate gradient evaluations.

Temperature Limits

The temperatures experienced during normal operation, including expected temperature overshoots, will determine the life expectancy of the thermal fuse. Nuisance trips can results if the thermal fuse rating is too close to the temperatures experienced during normal operation. Thermal fuses of any temperature rating should not be subjected to continuous normal temperatures in excess of 200°C. Additionally, overshoot temperatures after the opening of the thermal fuse should be minimized to avoid possible dielectric breakdown and reconduction of the thermal fuse.

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