ZY22 high voltage cutout fuses 2a 10a 15a 250v micro type k fuser link electrical safety fuse fast cutoff fuse

This specification refers to the RY series thermal cutoff. It is one-shot non-resettable electrical component, designed for thermal protection as electrical cutoff. If used for other purpose, or the instruction and cautions are not allowed, the product specification is not in effect.

The trigger part is a thermal pellet with special formula. The pellet presses Spring B and makes the contact connected under common temperature condition. When the working temperature of thermal link reaches the rated function temperature, the thermal pellet would melt and the spring B is released. Then, Spring A will push Star Contact and make it disconnected to lead. The circuit would be cut off permanently.

Mounting location: It needsrepeatedly verification to get a propermounting location. Infrared detector or thermocouple can be used for temperature detection so as to find out the protective temperature under malfunction. The designer should pay attention that the thermal link can only sense the intended heat source. For instance, when using the thermal link to heater, thermal link can not be connected to heating element directly, but through an non-heating wire to isolate from heating element to thermal link, so that the heat generated by heating element can not be transmitted to thermal link through lead. The thermal link is intended to mount the most sensitive location. If it is used in coil, it is better recess the thermal link inside of coil to improve the temperature sensitivity.

Each thermal cut off has its own electrical and temperature ratings. It should be intended to work in the range of rated parameters, including Tf, Th or Tc, rated voltage and current. The details refer to table 2. The normal continuous working temperature should not exceed the holding temperature Th. In addition, the current flow through the thermal link would generate some heat, which would cause body temperature higher thank ambient temperature. Different mounting method and location would cause different temperature increase.

Production Capability, Precise Equipment

When mounting,be careful of the short circuit of epoxy resin,for example,to avoid the contact between lead wireA and the case,otherwise,the current will flow from the lead wire on the epoxy resin seal side to the opposite lead wire so that the thermal-link can not break the circuit.Organic temperatuer-sensing thermal-link is live device,be sure that the case will have no contact with other metal mounting parts and insulation protection is provided on its surface.​