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thermal switch Founded in 1996, China ELE Electric Products Co., Ltd is professional thermal switch manufacturer and supplier specializing in developing and producing all kinds of electrical products and accessories. As an enterprise certified by ISO9001 system strictly, we have also got many safety certificates, such as CB, SEMKO, FIMKO, ESC, CCC, VED, UL, CE etc. We have great capacity to develop new thermal switches products, plastics and mental products according to our clients. |
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thermal switches show |
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Thermodisc #36TV21 L57-8.5C. Auto-reset bimetal thermal cut-off switch. Normally-closed. Opens at 57C degrees (approx 134F). Resets when temp falls 8.5C deg. 0.70" diameter x 0.74" high including terminals. Mounting holes on 0.9" centers. 0.25 qc/solder terminals. Where it is not possible to screw the switch to the item (such as a transformer), a high temperature epoxy can be used. Do not use Super-Glue or similar, as it is unsuited to the task.Likewise, don't use the 5-Minute "epoxies".They are not true epoxies, and cannot tolerate the sustained heat. True epoxy adhesives take about 24 hours to cure properly, and once cured are extremely robust. |
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The simplest of all is the thermal switch. These are used in washing machines, dish washers, microwave ovens, and many other appliances, and can be obtained from an appliance repairer for less than $10 .The switches need to be screwed down to heatsinks using thermal compound, but should be glued to transformers using a suitable adhesive (see below). Make certain that the tags are properly insulated to prevent electrocution - this is VITALLY important. Figure 1 shows the connections for the type of unit I refer to. These switches are available in a variety of temperatures, normally open, normally closed, etc. For amplifier protection, you need up to three normally closed thermal switches (TS1 to TS3), rated at no more than 80 degrees Celcius. |
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