1-5. Circuit Protection Parts
1-5-1. Thermistor
This unit is equipped with positive-characteristic thermistors (power thermistors) as circuit protection elements.
The positive-characteristic thermistor limits the electric current flowing through the circuit as the internal resistance
increases when an excessive current flows or when the ambient temperature increases.
If the positive-characteristic thermistor works, turn off the main power of the unit and inspect the internal circuit of the
unit. After the cause of the fault is eliminated and the positive-characteristic thermistor is cooled down, turn on the main
power again. The unit works normally. It takes about one minute to cool down the positive-characteristic thermistor
after the main power is turned off.
Board Ref. No. Address Part No. Holding current
AT-196 TH100 C-1
1-802-108-11
1.5 A/20 ℃
TH200 B-5
1-771-845-21
200 mA/20 ℃
DPR-386 THP1 F-6
1-771-845-21
500 mA/25 ℃
THP2 F-6
1-802-243-11
1.75 A/20 ℃
THP20 B-4
1-771-845-21
500 mA/25 ℃
THP100 F-3
1-804-458-21
500 mA/20 ℃
THP102 F-2
1-804-987-21
2.5 A/20 ℃
THP103 F-4
1-804-616-21
1.1 A/20 ℃
THP105 E-5
1-803-615-21
500 mA/20 ℃
THP106 E-4
1-804-458-21
500 mA/20 ℃
THP107 E-4
1-804-616-21
1.1 A/20 ℃
THP108 E-4
1-804-616-21
1.1 A/20 ℃
THP109 F-4
1-803-615-21
500 mA/20 ℃
THP110 F-4
1-803-615-21
500 mA/20 ℃
THP111 E-4
1-804-616-21
1.1 A/20 ℃
THP114 F-2
1-804-987-21
2.5 A/20 ℃
THP115 E-5
1-804-616-21
1.1 A/20 ℃
THP118 F-5
1-804-616-21
1.1 A/20 ℃
THP121 F-5
1-804-616-21
1.1 A/20 ℃
THP122 F-5
1-804-616-21
1.1 A/20 ℃
PS-934 TH201 B-2
1-811-308-21
1.1 A/20 ℃
HXCU-FB80
1-8
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