Thermal Cutoffs 1/2Amp - 7Amp - ThermTROL - #6

The following information describes the correct methods of us­ing thermal cutoffs to insure proper and safe performance. To achieve the full use and capacity of a thermal cutoff, it is nec­essary for the customer to exercise proper storage and ex­ecute appropriate circuit design, proper installation, and ad­equate testing. Thermtrol Corporation does not assume responsibility for problems which occur as a result of improper storage and installation, or inappropriate circuit design, evaluations or tests.

• Do not use thermal cutoffs for purposes other than for what they are intended. Thermal cutoffs operate only when they sense an ambient temperature greater than the factory pre-set temperature. They have no ability to function by current overload and are not current limiting devices.

• Do not use thermal cutoffs in equipment, appliances or devices in­tended to be used in the aerospace industry, aviation, nuclear power generation systems, life support systems, engine control systems, or safety control systems for transportation. Thermal cutoffs are ap­plicable for electrical household devices, appliances and electron­ics. Other applications include: office automation equipment, audio­visual equipment, communication systems, measuring instruments and specific transportation systems.

• Do not use thermal cutoffs in applications exceeding the listed rat­ings in the specification charts.

• Do not use thermal cutoffs in a liquid, in a corrosive atmosphere such as sulfurous gas, or in a high humidity environment.

• Customers shall choose the thermal cutoff appropriate for the application and determine the proper mounting position and/or method. To judge whether the selected thermal cutoff and chosen position and method of mounting is suitable for the final application, we recommend that the customer fully test and evaluate the unit in an environment that duplicates the final application as closely as possible. This includes mounting and securing the thermal cutoff identically to the method that will be used in production.

• When bending a lead, bend at a location 3mm minimum from the body of the thermal cutoff. See below.

• Take caution not to damage either the thermal cutoff body or the lead.

• Keep the thermal cutoff body free from any push, pull or twist force.

Specifications for push, pull and twist test according to UL Standards 1200

Units: Newtons

NOTE: The special sealant joining the lead wires to the case will soften during soldering. Care must be taken to not move the leads or body dur­ing the soldering process as the softened joints could shift and become disconnected. The sealant will resume its initial strength after cooling.

• Minimize the conduction of excessive heat to the thermal cutoff body when soldering.

• Maximum soldering time is shown below.

• During soldering, both the thermal cutoff body and leads should be free of any push, pull or twist force.

• After manual soldering, allow the thermal cutoff to cool for 30 seconds minimum without moving it. Automatic wave soldered units must cool for a minimum of 5 minutes.

Points of soldering

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When using thermal cutoffs, considerable caution should be exer­cised as follows:

• Mount the thermal cutoff in a location where uniform radiation of heat is sustained over the body of the unit.

• Keep the leads as long as possible to maximize the area of expo­sure to heat.

• Place and connect the thermal cutoff in a manner so that no ex­ternal mechanical force will be applied to the body and/or leads of the cutoff.

• Allow adequate space for mounting the thermal cutoff.

Units: Seconds

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