MF73T-1

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High Power Inrush Current Limiter

Inrush Current Limiters

Power NTC Thermistor The MF73T-1 series Power NTC Thermistors provide inrush current suppression for sensitive electronics. Connecting a MF73T-1 in series with the power source will limit the current surges typically created at turn on.

MF73T-1

Applications

• 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.

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

Specification

Dimensions

D15D20D25D30D35
Chip Dimensionsø 15ø 20ø 25ø 30ø 35
(Dmax)
Overall Diameter (mm)
17.522.5293641
(Tmax)
Thickness (mm)
6788.510
(F ± 1.5)
Pitch (mm)
7.510.010.010.0* 1818> Add suffix
“Pxx” to specify the Pitch (F) or> “Dxx” for Diameter of the leads (d)
(d ± 0.05)
Dia of Leads (mm)
0.81.01.01.2* 1.61.8* 2.0
(L) min
Length of Leads (mm)
2525252525
(L1) min
Length of Leads (mm)
171717
Standard Leads
Figure
(I)
Inside kink
(II)
Straight
(II)
Straight
(II)
Straight
(II)
Straight
> Add suffix “L” + figure # to
part number to specify optional leads
Optional Leads
Figure
(II)
Straight
(III)
Outside kink
(III)
Outside kink
Weight (g).
Approx
3.16.28.820.528.8

Illustration:In general, the long bent lead wire is used, see figure II * Standard

Technical Specifications

Working Temperature: -55~200†C

Part NO.
MF73T-1
Res +20%
(Ω)
Max. Steady
State Current
lmax (A)
Approx. R
of MaxCurrent
Rmax (Ω)
ø15mm Chip Diameter
Max Rated Power Pmax (W): 3.5
Dissipation Coefficient (mW/†C): ≥ 22
Thermal Time Constant (S): ≤ 75
1.3/101.3100.034
1.5/101.5100.036
2.5/9.52.59.50.044
5/8580.058
6/7670.069
7/7770.078
8/7870.084
10/71070.098
12/61260.116
15/61660.129
20/62060.136
30/53050.165
47/44740.257
120/2.51202.50.652
Part NO.
MF73T-1
Res +20%
(Ω)
Max. Steady
State Current
lmax (A)
Approx. R
of MaxCurrent
Rmax (Ω)
ø20mm Chip Diameter
Max Rated Power Pmax (W): 5.0
Dissipation Coefficient (mW/†C): ≥ 28
Thermal Time Constant (S): ≤ 110
0.7/160.7160.026
1/161160.027
1.5/151.5150.030
2/142140.035
2.5/132.5130.038
3/123120.040
4/124120.043
4.7/124.7120.046
5/125120.047
6/116110.052
6.8/106.8100.055
7/9790.056
10/81080.085
12/7.5127.50.098
15/71570.112
18/71870.123
20/72070.132
Part NO.
MF73T-1
Res +20%
(Ω)
Max. Steady
State Current
lmax (A)
Approx. R
of MaxCurrent
Rmax (Ω)
ø25mm Chip Diameter
Max Rated Power Pmax (W): 7.0
Dissipation Coefficient (mW/†C): ≥ 30
Thermal Time Constant (S): ≤ 130
0.5/220.5220.017
0.7/220.7220.017
1/201200.021
1.5/191.5190.024
2/182180.026
2.5/162.5160.029
3/15.5315.50.032
4/154150.039
4.7/144.7140.044
5/145140.047
6.8/126.8120.061
7/117110.064
8/108100.079
10/1010100.084
12/91290.102
15/81580.117
18/81880.132
20/82080.132
Part NO.
MF73T-1
Res +20%
(Ω)
Max. Steady
State Current
lmax (A)
Approx. R
of MaxCurrent
Rmax (Ω)
ø30mm Chip Diameter
Max Rated Power Pmax (W): 8.0
Dissipation Coefficient (mW/†C): ≥ 40
Thermal Time Constant (S): ≤ 190
0.5/300.5300.013
1/301300.014
1.5/251.5250.016
2/232230.019
2.5/202.5200.023
3/19.5319.50.026
4/194190.031
4.7/184.7180.035
5/175170.037
6.8/166.8160.043
7/157150.044
8/148140.049
10/1310130.056
12/1212120.067
15/1115110.078
18/1018100.092
29/92090.113
Part NO.
MF73T-1
Res +20%
(Ω)
Max. Steady
State Current
lmax (A)
Approx. R
of MaxCurrent
Rmax (Ω)
ø35mm Chip Diameter
Max Rated Power Pmax (W): 9.0
Dissipation Coefficient (mW/†C): ≥ 55
Thermal Time Constant (S): ≤ 280
0.5/320.5320.01
1/321320.011
1.5/281.5280.013
2/252250.017
2.5/232.5230.020
3/223220.023
4/214210.026
4.7/204.7200.029
5/195190.030
6.8/186.8180.035
7/177170.037
8/168160.041
10/1510150.045
12/1412140.051
15/1315130.060
18/1118110.072
20/1020100.089