|
 NTC
Thermistors
|
| MF72
Power
NTC Thermistor
The MF72 series Power NTC
Thermistors provide inrush current suppression for
sensitive electronics. Connecting a MF72 in series
with the power source will limit the current surges
typically created at turn on. Once the circuit is
energized the resistance of the MF72 will decrease
rapidly to a very low value, power consumption can
be ignored and there will be no effect on normal operating
current. Using the MF72 Power NTC Thermistor is a
most cost-effective way to curb surge current and
protect sensitive electronics from damage.
|
MF72 >
PDF Tech Info, Schematics and More
|
|
Application
Can be installed into the power circuits of:
• Power supplies and inverters
• Uninterruptible Power Supplies
• Energy saving lamps
• Electronic Ballasts
• Filament Protection of various types of lamps
• Some types of heaters
• For higher power circuits ask about the MF73
and MF74 series surge suppressors.
|
Characteristics
• Small Size and fast response
• High Power handling capability
• Fast response to surge current
• High material constant (B value)
• Low residual resistance
• Wide operating temperature range -55 to +200C
• R25 allowable tolerance is ±20%
• Long-term Stability and Reliability
• UL 1434 File# E241319
• CQC File# 04001010556
 |
Specification
 |
Dimensions
| Part
No./Dim (mm)/Sym |
D
+2
-1 |
Tmax |
+/-
0.05 |
F1
+/-1 |
F2
+/- 1.5 |
Straight
Lead Wire |
Curved
Lead Wire |
| Lmin |
b
L1min |
L2+/-2 |
| MF72-
D5 |
6.5 |
5 |
0.6/0.45 |
5/2.5 |
3 |
25 |
17/5 |
8 |
| MF72-
D7 |
8.5 |
5 |
0.6 |
5 |
3 |
25 |
17/5 |
8 |
| MF72-
D9 |
10.5 |
5.5 |
0.8/0.6 |
7.5/5 |
5/3 |
25 |
17/5 |
8 |
| MF72-
D11 |
12.5 |
5.5 |
0.8/0.6 |
7.5/5 |
5/3 |
25 |
17/5 |
8 |
| MF72-
D13 |
14.5 |
6 |
0.8 |
7.5 |
5 |
25 |
17/5 |
8 |
| MF72-
D15 |
16.5 |
6 |
0.8 |
10/7.5 |
5 |
25 |
17/5 |
8 |
| MF72-
D20 |
21.5 |
7 |
1.0 |
10/7.5 |
/ |
25 |
/ |
/ |
| MF72-
D25 |
26.5 |
8 |
1.0 |
10 |
/ |
25 |
/ |
/ |
| Remark |
a, rated zero-power resistance
b, 17/5 17 indicates the long bent
lead wire, 5 indicates the short bent lead wire
(Fig. III) |
Illustration:In
general, the long bent lead wire is used, see figure
II
|
Main Techno Parameter
| Part
NO. |
R25
(Ω) |
Max.
Steady State Current
(A) |
Approx.R
of Max.Cur
(Ω) |
Dissi,Coef.
(mW/°C) |
Thermal
time Constant
(S) |
UL
Recognized |
Operating
Temp.
(°C) |
| MF72-5D5 |
5 |
1 |
0.353 |
6 |
20 |
|
-55
to +200 |
| MF72-10D5 |
10 |
0.7 |
0.771 |
6 |
20 |
|
| MF72-60D5 |
60 |
0.5 |
1.878 |
6 |
18 |
|
| MF72-200D5 |
200 |
0.1 |
6.259 |
6 |
18 |
|
| MF72-5D7 |
5 |
2 |
0.283 |
10 |
30 |
|
| MF72-8D7 |
8 |
1 |
0.539 |
9 |
28 |
|
| MF72-10D7 |
10 |
1 |
0.616 |
9 |
27 |
|
| MF72-12D7 |
12 |
1 |
0.816 |
9 |
27 |
|
| MF72-16D7 |
16 |
0.7 |
1.003 |
9 |
27 |
|
| MF72-22D7 |
22 |
0.6 |
1.108 |
9 |
27 |
|
| MF72-33D7 |
33 |
0.5 |
1.485 |
10 |
28 |
|
| MF72-200D7 |
200 |
0.2 |
6.233 |
11 |
28 |
|
| MF72-3D9 |
3 |
4 |
0.120 |
11 |
35 |
√ |
| MF72-4D9 |
4 |
3 |
0.190 |
11 |
35 |
√ |
| MF72-5D9 |
5 |
3 |
0.210 |
11 |
34 |
√ |
| MF72-6D9 |
6 |
2 |
0.315 |
11 |
34 |
√ |
| MF72-8D9 |
8 |
2 |
0.400 |
11 |
32 |
√ |
| MF72-10D9 |
10 |
2 |
0.458 |
11 |
32 |
√ |
| MF72-12D9 |
12 |
1 |
0.652 |
11 |
32 |
√ |
| MF72-16D9 |
16 |
1 |
0.802 |
11 |
31 |
√ |
| MF72-20D9 |
20 |
1 |
0.864 |
11 |
30 |
√ |
| MF72-22D9 |
22 |
1 |
0.950 |
11 |
30 |
√ |
| MF72-30D9 |
30 |
1 |
1.022 |
11 |
30 |
√ |
| MF72-33D9 |
33 |
1 |
1.124 |
11 |
30 |
√ |
| MF72-50D9 |
50 |
1 |
1.252 |
11 |
30 |
√ |
| MF72-60D9 |
60 |
0.8 |
1.502 |
11 |
30 |
√ |
| MF72-80D9 |
80 |
0.8 |
2.010 |
11 |
30 |
√ |
| MF72-120D9 |
120 |
0.8 |
3.015 |
11 |
30 |
√ |
| MF72-200D9 |
200 |
0.5 |
5.007 |
11 |
32 |
√ |
| MF72-400D9 |
400 |
0.2 |
9.852 |
11 |
32 |
√ |
| MF72-2.5D11 |
2.5 |
5 |
0.095 |
13 |
43 |
|
| MF72-3D11 |
3 |
5 |
0.100 |
13 |
43 |
|
| MF72-4D11 |
4 |
4 |
0.150 |
13 |
44 |
|
| MF72-5D11 |
5 |
4 |
0.156 |
13 |
45 |
|
| MF72-6D11 |
6 |
3 |
0.240 |
13 |
45 |
|
| MF72-8D11 |
8 |
3 |
0.255 |
14 |
47 |
|
| MF72-10D11 |
10 |
3 |
0.275 |
14 |
47 |
|
| MF72-12D11 |
12 |
2 |
0.462 |
14 |
48 |
|
| MF72-16D11 |
16 |
2 |
0.470 |
14 |
50 |
|
| MF72-20D11 |
20 |
2 |
0.512 |
15 |
52 |
|
| MF72-22D11 |
22 |
2 |
0.563 |
15 |
52 |
|
| MF72-30D11 |
30 |
1.5 |
0.667 |
15 |
52 |
|
| MF72-33D11 |
33 |
1.5 |
0.734 |
15 |
52 |
|
| MF72-50D11 |
50 |
1.5 |
1.021 |
15 |
52 |
|
| MF72-60D11 |
60 |
1.5 |
1.215 |
15 |
52 |
|
| MF72-80D11 |
80 |
1.2 |
1.656 |
15 |
52 |
√ |
| MF72-1.3D13 |
1.3 |
7 |
0.062 |
13 |
60 |
√ |
| MF72-1.5D13 |
1.5 |
7 |
0.073 |
13 |
60 |
√ |
| MF72-2.5D13 |
2.5 |
6 |
0.088 |
13 |
60 |
√ |
| MF72-3D13 |
3 |
6 |
0.092 |
14 |
60 |
√ |
| MF72-4D13 |
4 |
5 |
0.120 |
15 |
67 |
√ |
| MF72-5D13 |
5 |
5 |
0.125 |
15 |
68 |
√ |
| MF72-6D13 |
6 |
4 |
0.170 |
15 |
65 |
√ |
| MF72-7D13 |
7 |
4 |
0.188 |
15 |
65 |
√ |
| MF72-8D13 |
8 |
4 |
0.194 |
15 |
60 |
√ |
| MF72-10D13 |
10 |
4 |
0.206 |
15 |
65 |
√ |
| MF72-12D13 |
12 |
3 |
0.316 |
16 |
65 |
√ |
| MF72-15D13 |
15 |
3 |
0.335 |
16 |
60 |
√ |
| MF72-16D13 |
16 |
3 |
0.338 |
16 |
60 |
√ |
| MF72-20D13 |
20 |
3 |
0.372 |
16 |
65 |
√ |
| MF72-30D13 |
30 |
2.5 |
0.517 |
16 |
65 |
√ |
| MF72-47D13 |
47 |
2 |
0.810 |
17 |
65 |
√ |
| MF72-120D13 |
120 |
1.5 |
2.124 |
16 |
65 |
√ |
| MF72-1.3D15 |
1.3 |
8 |
0.048 |
18 |
68 |
√ |
| MF72-1.5D15 |
1.5 |
8 |
0.052 |
19 |
69 |
√ |
| MF72-3D15 |
3 |
7 |
0.075 |
18 |
76 |
|
| MF72-5D15 |
5 |
6 |
0.112 |
20 |
76 |
|
| MF72-6D15 |
6 |
5 |
0.155 |
20 |
80 |
|
| MF72-7D15 |
7 |
5 |
0.173 |
20 |
80 |
|
| MF72-8D15 |
9 |
5 |
0.178 |
20 |
80 |
|
| MF72-10D15 |
10 |
5 |
0.180 |
20 |
75 |
|
| MF72-12D15 |
12 |
4 |
0.250 |
20 |
75 |
|
| MF72-15D15 |
15 |
4 |
0.268 |
21 |
85 |
|
| MF72-16D15 |
16 |
4 |
0.276 |
21 |
70 |
|
| MF72-20D15 |
20 |
4 |
0.288 |
17 |
86 |
|
| MF72-30D15 |
30 |
3.5 |
0.438 |
18 |
75 |
|
| MF72-47D15 |
47 |
3 |
0.680 |
21 |
86 |
|
| MF72-120D15 |
120 |
2.5 |
1.652 |
22 |
87 |
√ |
| MF72-0.7D20 |
0.7 |
12 |
0.018 |
25 |
89 |
√ |
| MF72-1.3D20 |
1.3 |
9 |
0.037 |
24 |
88 |
|
| MF72-3D20 |
3 |
8 |
0.055 |
24 |
88 |
|
| MF72-5D20 |
5 |
7 |
0.087 |
23 |
87 |
|
| MF72-6D20 |
6 |
6 |
0.113 |
25 |
103 |
|
| MF72-8D20 |
8 |
6 |
0.142 |
25 |
105 |
|
| MF72-10D20 |
10 |
6 |
0.162 |
24 |
102 |
|
| MF72-12D20 |
12 |
5 |
0.195 |
24 |
100 |
|
| MF72-16D20 |
16 |
5 |
0.212 |
25 |
100 |
√ |
| MF72-0.7D25 |
0.7 |
13 |
0.014 |
30 |
120 |
|
| MF72-1.5D25 |
1.5 |
10 |
0.027 |
30 |
121 |
|
| MF72-3D25 |
3 |
9 |
0.044 |
32 |
124 |
|
| MF72-5D25 |
5 |
8 |
0.070 |
32 |
125 |
|
| MF72-8D25 |
8 |
7 |
0.114 |
33 |
125 |
|
| MF72-10D25 |
10 |
7 |
0.130 |
32 |
127 |
|
| MF72-12D25 |
12 |
6 |
0.156 |
32 |
126 |
|
| MF72-16D25 |
16 |
6 |
0.160 |
35 |
126 |
|
Note:
Unless otherwise specified, the allowable tolerance
of R25 is +/- 20%
|
8415
Mountain
Sights Avenue, Montreal (Quebec), H4P 2B8 Canada
