What should be paid attention to in the use of NTC thermistors?
The matters needing attention in the use of NTC thermistors are as follows:
1.Be sure to add a suitable series resistance, otherwise the NTC will thermally collapse when it is used, because the current flowing through the NTC will generate heat. If the heat cannot be dissipated in time, the temperature of the NTC will increase, and then the resistance value will decrease, and the current will Significantly increase, the NTC will get hotter, and such a cycle can eventually cause the NTC to burn out, or even catch fire.
2.The end electrodes of NTCs are usually composed of Ag, which migrates when improperly used, causing the NTC to short-circuit. Avoid contact of NTC with water during use.
3.The high temperature during soldering will cause the irreversible resistance drift of the NTC, which may cause a 5% drift in some cases, so try to avoid high temperature soldering.
4.NTC SMDs are constructed of ceramic and may break during installation.
