PTC thermistors are semiconductor ceramic devices that exhibit an ability to switch from a low resistance state to a high resistance state depending on their body temperature. TDA’s PTC ceramic thermistors have been proven reliable and effective over many years of use in a variety of over-current applications; protection for VoIP FXS linecard, VoIP gateway, PBX, Central Office Multi-channel FXS, DLC and PBX FXS, and Analog Trunk FXO application circuits.
Ceramic PTCs, unlike other PTC technologies, return to their same initial R25 after being subjected to a fault condition. Ceramic PTCs can be switched repeatedly; will return to their initial value, and are not subjected to hysteresis. Ceramic PTCs can be sorted into very tight resistance groups for matched pair applications, For over-current applications, the PTC element is normally placed in series with the component that requires over-current protection.
Features of TSF4SS-20RF are matched pairs in one component, significantly reducing the assembly time, it comes with a ceramic case that can endure 1000 degrees C, small footprint that allows the increase of number of lines per PCB, RoHS compliant and suitable for Pb-free reflow soldering, compliant with ITU-T K20,K21.
Ceramic PTCs, unlike other PTC technologies, return to their same initial R25 after being subjected to a fault condition. Ceramic PTCs can be switched repeatedly; will return to their initial value, and are not subjected to hysteresis. Ceramic PTCs can be sorted into very tight resistance groups for matched pair applications, For over-current applications, the PTC element is normally placed in series with the component that requires over-current protection.
Features of TSF4SS-20RF are matched pairs in one component, significantly reducing the assembly time, it comes with a ceramic case that can endure 1000 degrees C, small footprint that allows the increase of number of lines per PCB, RoHS compliant and suitable for Pb-free reflow soldering, compliant with ITU-T K20,K21.
