Ametherm SL322R025 Cross High Power Inrush Current Limiter MF73T-1 2/25 NTC Thermistor 2Ohm 25A 3300uF 5W 35mm Dia
Description
Power NTC Thermistor The MF73T-1 series Power NTC Thermistors provide inrush current suppression for sensitive electronics such as power supplies,UPS,inverters etc. Connecting a MF73T-1 in series with the power source will limit the current surges typically created at turn on.
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Application
• High power switching power supplies, Power conversion, UPS power.
• High power battery charger, electric vehicle battery charger.
• High power LED light, high power electronic energy saving lamps and other lamps.
Specification for MF73T-1 2/25
| Product Name |
High Power Inrush Current Limiter NTC Thermistor |
| Part Number |
MF73T-1 2/25 |
| Dimension |
| D=41mm max |
F: 18±1.5mm |
| L1:min.25mm |
T: 12mm Max. |
| d: 2.0±0.05 |
|
|
| Lead material |
Tin plated copper wire |
| Coating |
Silicone resin |
| Zero Power Resistance at 25C |
2Ω±20% |
| B Value 25/50 |
2600±10% |
| Maximum steady-state current |
25A |
| Max. Capacitance 240Vac |
3300uF |
| Thermal dissipation Coefficient |
45mW/℃ |
| Thermal time constant |
280 Sec |
| Withstand voltage 500V/AC 1min |
No breakdown or flashover |
| Insulation resistance 500V/DC 1min |
≥500MΩ |
| Operating temperature |
-40℃ ～ 200℃ |
| Maximum rated power |
5.0W |
Matters need attention
1 This product USES: Inhibition of surge current;
2 When the soldering iron welding, the welding place at least 2 mm space from coating layer and the welding temperature should be lower than 360 ℃, welding time < 3 ses
3Storage temp:-10℃ ～ 40℃；storage humidity :≤75% RH；
4 Avoid air corrosion or sunlight
5 Remake sealed storage after package opening.
6 Shelf life: 1 year
Characteristics
• Small size, high power, reliable surge current protection.
• High material constant (B value),
• Low residual resistance
• High steady state current, long lasting, high reliability
• Convenient for PCB installation, wide operating range
MF73T-1 Series NTC Thermistor Part numbering
MF73T-1 Series NTC Thermistor Dimension (mm)
| |
D15 |
D20 |
D25 |
D30 |
D35 |
| Chip Dimensions |
ø 15 |
ø 20 |
ø 25 |
ø 30 |
ø 35 |
| (Dmax) |
17.5 |
22.5 |
29 |
36 |
41 |
| Overall Diameter (mm) |
| (Tmax) |
6 |
7 |
8 |
8.5 |
10 |
| Thickness (mm) |
| (F ± 1.5) |
7.5 |
10 |
10 |
10 |
* 18 |
18 |
| Pitch (mm) |
| (d ± 0.05) |
0.8 |
1 |
1 |
1.2 |
* 1.6 |
1.8 |
* 2.0 |
| Dia of Leads (mm) |
| (L) min |
25 |
25 |
25 |
25 |
25 |
| Length of Leads (mm) |
| (L1) min |
17 |
17 |
17 |
|
|
| Length of Leads (mm) |
| Standard Leads |
(I) |
(II) |
(II) |
(II) |
(II) |
| Figure |
Inside kink |
Straight |
Straight |
Straight |
Straight |
| Optional Leads |
(II) |
(III) |
(III) |
|
|
| Figure |
Straight |
Outside kink |
Outside kink |
|
|
| Weight (g). |
3.1 |
6.2 |
8.8 |
20.5 |
28.8 |
| Approx |
Illustration:In general, the long bent lead wire is used, see figure II * Standard
MF73T-1 Series NTC Thermistor Technical Specifications
Working Temperature: -55~200℃
Part NO.
MF73T-1 |
Res +20%
(Ω) |
Max. Steady
State Current
lmax (A) |
Approx. R
of MaxCurrent
Rmax (Ω) |
ø15mm Chip Diameter MF73T-1 Series NTC Thermistor
Max Rated Power Pmax (W): 3.5
Dissipation Coefficient (mW/†C): ≥ 22
Thermal Time Constant (S): ≤ 75 |
| 1.3/10 |
1.3 |
10 |
0.034 |
| 1.5/10 |
1.5 |
10 |
0.036 |
| 2.5/9.5 |
2.5 |
9.5 |
0.044 |
| 5/8 |
5 |
8 |
0.058 |
| 6/7 |
6 |
7 |
0.069 |
| 7/7 |
7 |
7 |
0.078 |
| 8/7 |
8 |
7 |
0.084 |
| 10/7 |
10 |
7 |
0.098 |
| 12/6 |
12 |
6 |
0.116 |
| 15/6 |
16 |
6 |
0.129 |
| 20/6 |
20 |
6 |
0.136 |
| 30/5 |
30 |
5 |
0.165 |
| 47/4 |
47 |
4 |
0.257 |
| 120/2.5 |
120 |
2.5 |
0.652 |
Part NO.
MF73T-1 |
Res +20%
(Ω) |
Max. Steady
State Current
lmax (A) |
Approx. R
of MaxCurrent
Rmax (Ω) |
ø20mm Chip Diameter MF73T-1 Series NTC Thermistor
Max Rated Power Pmax (W): 5.0
Dissipation Coefficient (mW/†C): ≥ 28
Thermal Time Constant (S): ≤ 110 |
| 0.7/16 |
0.7 |
16 |
0.026 |
| 1/16 |
1 |
16 |
0.027 |
| 1.5/15 |
1.5 |
15 |
0.030 |
| 2/14 |
2 |
14 |
0.035 |
| 2.5/13 |
2.5 |
13 |
0.038 |
| 3/12 |
3 |
12 |
0.040 |
| 4/12 |
4 |
12 |
0.043 |
| 4.7/12 |
4.7 |
12 |
0.046 |
| 5/12 |
5 |
12 |
0.047 |
| 6/11 |
6 |
11 |
0.052 |
| 6.8/10 |
6.8 |
10 |
0.055 |
| 7/9 |
7 |
9 |
0.056 |
| 10/8 |
10 |
8 |
0.085 |
| 12/7.5 |
12 |
7.5 |
0.098 |
| 15/7 |
15 |
7 |
0.112 |
| 18/7 |
18 |
7 |
0.123 |
| 20/7 |
20 |
7 |
0.132 |
Part NO.
MF73T-1 |
Res +20%
(Ω) |
Max. Steady
State Current
lmax (A) |
Approx. R
of MaxCurrent
Rmax (Ω) |
ø25mm Chip Diameter MF73T-1 Series NTC Thermistor
Max Rated Power Pmax (W): 7.0
Dissipation Coefficient (mW/†C): ≥ 30
Thermal Time Constant (S): ≤ 130 |
| 0.5/22 |
0.5 |
22 |
0.017 |
| 0.7/22 |
0.7 |
22 |
0.017 |
| 1/20 |
1 |
20 |
0.021 |
| 1.5/19 |
1.5 |
19 |
0.024 |
| 2/18 |
2 |
18 |
0.026 |
| 2.5/16 |
2.5 |
16 |
0.029 |
| 3/15.5 |
3 |
15.5 |
0.032 |
| 4/15 |
4 |
15 |
0.039 |
| 4.7/14 |
4.7 |
14 |
0.044 |
| 5/14 |
5 |
14 |
0.047 |
| 6.8/12 |
6.8 |
12 |
0.061 |
| 7/11 |
7 |
11 |
0.064 |
| 8/10 |
8 |
10 |
0.079 |
| 10/10 |
10 |
10 |
0.084 |
| 12/9 |
12 |
9 |
0.102 |
| 15/8 |
15 |
8 |
0.117 |
| 18/8 |
18 |
8 |
0.132 |
| 20/8 |
20 |
8 |
0.132 |
Part NO.
MF73T-1 |
Res +20%
(Ω) |
Max. Steady
State Current
lmax (A) |
Approx. R
of MaxCurrent
Rmax (Ω) |
ø30mm Chip Diameter MF73T-1 Series NTC Thermistor
Max Rated Power Pmax (W): 8.0
Dissipation Coefficient (mW/†C): ≥ 40
Thermal Time Constant (S): ≤ 190 |
| 0.5/30 |
0.5 |
30 |
0.013 |
| 1/30 |
1 |
30 |
0.014 |
| 1.5/25 |
1.5 |
25 |
0.016 |
| 2/23 |
2 |
23 |
0.019 |
| 2.5/20 |
2.5 |
20 |
0.023 |
| 3/19.5 |
3 |
19.5 |
0.026 |
| 4/19 |
4 |
19 |
0.031 |
| 4.7/18 |
4.7 |
18 |
0.035 |
| 5/17 |
5 |
17 |
0.037 |
| 6.8/16 |
6.8 |
16 |
0.043 |
| 7/15 |
7 |
15 |
0.044 |
| 8/14 |
8 |
14 |
0.049 |
| 10/13 |
10 |
13 |
0.056 |
| 12/12 |
12 |
12 |
0.067 |
| 15/11 |
15 |
11 |
0.078 |
| 18/10 |
18 |
10 |
0.092 |
| 29/9 |
20 |
9 |
0.113 |
Part NO.
MF73T-1 |
Res +20%
(Ω) |
Max. Steady
State Current
lmax (A) |
Approx. R
of MaxCurrent
Rmax (Ω) |
ø35mm Chip Diameter MF73T-1 Series NTC Thermistor
Max Rated Power Pmax (W): 9.0
Dissipation Coefficient (mW/†C): ≥ 55
Thermal Time Constant (S): ≤ 280 |
| 0.5/32 |
0.5 |
32 |
0.01 |
| 1/32 |
1 |
32 |
0.011 |
| 1.5/28 |
1.5 |
28 |
0.013 |
| 2/25 |
2 |
25 |
0.017 |
| 2.5/23 |
2.5 |
23 |
0.020 |
| 3/22 |
3 |
22 |
0.023 |
| 4/21 |
4 |
21 |
0.026 |
| 4.7/20 |
4.7 |
20 |
0.029 |
| 5/19 |
5 |
19 |
0.030 |
| 6.8/18 |
6.8 |
18 |
0.035 |
| 7/17 |
7 |
17 |
0.037 |
| 8/16 |
8 |
16 |
0.041 |
| 10/15 |
10 |
15 |
0.045 |
| 12/14 |
12 |
14 |
0.051 |
| 15/13 |
15 |
13 |
0.060 |
| 18/11 |
18 |
11 |
0.072 |
| 20/10 |
20 |
10 |
0.089 |
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