Electronic Ceramic NTC Type Thermistor For Inrush Current Limiting

Long Life High Reliability NTC Type Thermistor Strong In Inrush Current Limiting
 

Features:

1. Small dimension, powerful, strong in inrush current limiting.
2. Fast feedback.
3. Large material constant, lower residue resistance.
4. Long life, high reliability.
5. Complete part, wide operation range.
6. Operating temperature -55~+200 ­

Applications

Temperature measurement and control of household air-conditioner, refrigerator, icebox,water heater,drinking
machine,radiator,dishwasher, disinfector,washing machine, drying machine,middle-or-low-temperature drying box and constant
temperature box.

Conventional product electrical performance parameters​

 

Part No.Mf72	R25	Max,Steady Stale Current(A)	Approx. R of Maz.Cur.	Dissi.Coef.(MW/℃)	Thermal time Constant(S)	Operating Temp.(℃)
5D5	5	1	0.353	6	20	-55~+200
10D5	10	0.7	0.771	6	20
60D5	60	0.3	1.878	6	18
200D5	200	0.1	18.70	6	18
5D7	5	2	0.283	10	30
8D7	8	1	0.539	9	28
10D7	10	1	0.616	9	27
12D7	12	1	0.816	9	27
16D7	16	0.7	1.003	9	27
22D7	22	0.6	1.108	9	27
33D7	33	0.5	1.485	10	28
200D7	200	0.2	11.65	11	28
3D9	3	4	0.120	11	35
4D9	4	3	0.190	11	35
5D9	5	3	0.210	11	34
6D9	6	2	0.315	11	34
8D9	8	2	0.400	11	32
10D9	10	2	0.458	11	32
12D9	12	1	0.652	11	32
16D9	16	1	0.802	11	31
20D9	20	1	0.864	11	30
22D9	22	1	0.950	11	30
30D9	30	1	1.022	11	30
33D9	33	1	1.124	11	30
50D9	50	1	1.252	11	30
60D9	60	0.8	1.502	11	30
80D9	80	0.8	2.010	11	30
120D9	120	0.8	3.015	11	30
200D9	200	0.5	5.007	11	32
400D9	400	0.2	30.30	11	32
2.5D11	2.5	5	0.095	13	43
3D11	3	5	0.100	13	43
4D11	4	4	0.150	13	44
5D11	5	4	0.156	13	45
6D11	6	3	0.240	13	45
8D11	8	3	0.255	14	47
10D11	10	3	0.275	14	47
12D11	12	2	0.462	14	48
16D11	16	2	0.470	14	50
20D11	20	2	0.512	15	52
22D11	22	2	0.563	15	52
30D11	30	1.5	0.667	15	52
33D11	33	1.5	0.734	15	52
50D11	50	1.5	1.021	15	52
60D11	60	1.5	1.215	15	52
80D11	80	1.2	1.656	15	52
1.3D13	1.3	7	0.062	13	52
1.5D13	1.5	7	0.073	13	60
2.5D13	2.5	6	0.088	13	160
3D13	3	6	0.092	14	60
4D13	4	5	0.120	15	67
5D13	5	5	0.125	15	68
6D13	6	4	0.170	15	65
7D13	7	4	0.188	15	65
8D13	8	4	0.194	15	60
10D13	10	4	0.206	15	65
12D13	12	3	0.316	16	65
15D13	15	3	0.335	16	60
16D13	16	3	0.338	16	60
20D13	20	3	0.372	16	65
30D13	30	2.5	0.517	16	65
47D13	47	2	0.810	17	65
120D13	120	1.2	2.124	16	65
1.3D15	1.3	8	0.048	18	65
1.5D15	1.5	8	0.052	18	68
3D15	3	7	0.075	18	69
5D15	5	6	0.112	18	76
6D15	6	5	0.155	20	76
7D15	7	5	0.173	20	80
8D15	8	5	0.178	20	80
10D15	10	5	0.180	20	80
12D15	12	4	0.250	20	80
15D15	15	4	0.268	21	75
16D15	16	4	0.276	21	75
20D15	20	4	0.288	21	85
30D15	30	3.5	0.438	21	70
47D15	47	3	0.680	21	86
120D15	120	1.8	1.652	22	87
0.7D20	0.7	11	0.018	24	89
1.3D20	1.3	9	0.037	24	88
3D20	3	8	0.055	24	88
5D20	5	7	0.087	24	87
6D20	6	6	0.113	25	103
8D20	8	6	0.142	25	105
10D20	10	6	0.162	25	102
12D20	12	5	0.195	25	100
16D20	16	5	0.212	25	100
0.7D25	0.7	12	0.014	30	120
1.5D25	1.5	10	0.027	30	121
3D25	3	9	0.044	32	124
5D25	5	8	0.070	32	125
8D25	8	7	0.114	33	125
10D25	10	7	0.130	32	125
12D25	12	6	0.156	32	126
16D25	16	6	0.160	35	126

Negative temperature coefficient thermistor, also known as NTC thermistor, is a kind of sensor resistance whose resistance value decreases with the increase of temperature. Widely used in various electronic components, such as temperature sensors, resettable fuses and self-adjusting heaters, etc.

How to identify the thermistor is good or bad:

Thermistors have different temperature response parameters, and the temperature response curve of the thermistor to be tested must be obtained first. Measure the resistance of the thermistor with an ohmmeter at different ambient temperatures:
1. Normal temperature detection (indoor temperature is close to 25°C), use crocodile clips instead of test leads to clamp the two pins of the PTC thermistor to measure the actual resistance value, and compare it with the nominal resistance value, the difference between the two is ±2Ω Inside is normal. If the actual resistance value differs too much from the nominal resistance value, it indicates that its performance is poor or damaged.
2. Heating detection. On the basis of the normal temperature test, the second step of testing - heating detection can be carried out. Put a heat source (such as an electric soldering iron) close to the thermistor to heat it, and observe the multi-purpose indicator. At this time If you see that the multi-purpose reading changes with the increase of temperature.
This indicates that the resistance value is gradually changing (the resistance value of the negative temperature coefficient thermistor NTC will become smaller, and the resistance value of the positive temperature coefficient thermistor PTC will become larger), and when the resistance value changes to a certain value, the displayed data will gradually stabilize , indicating that the thermistor is normal. If the resistance value does not change, it indicates that its performance has deteriorated and cannot continue to be used.