Inrush Current Limiter Power NTC Thermistor MF72 5D-13 5Ohm 13mm 5A For Power Supply
III Description Of Power NTC Thermistor
Inrush Current Limiters are used to reduce the inrush current that occurs when an electrical device is switched on. High inrush current is the result of the maximum instantaneous input current drawn by an electrical device during the initial power up. As technology continues to advance, most systems today run efficiently and maintain a low impedance which in turn contributes to high inrush current.
MF72-1.3D13 1.3 7 0.062 13 60 880 220
MF72-1.5D13 1.5 7 0.073 13 60 880 220
MF72-2.5D13 2.5 6 0.088 13 60 880 220
MF72-3D13 3 6 0.092 14 60 880 220
MF72-4D13 4 5 0.120 15 67 880 220
MF72-5D13 5 5 0.125 15 68 880 220
MF72-6D13 6 4 0.170 15 65 880 220
MF72-7D13 7 4 0.188 15 65 1320 330
MF72-8D13 8 4 0.194 15 60 1320 330
MF72-10D13 10 4 0.206 15 65 1320 330
MF72-12D13 12 3 0.316 16 65 1320 330
MF72-15D13 15 3 0.335 16 60 1320 330
MF72-16D13 16 3 0.338 16 60 1320 330
MF72-20D13 20 3 0.372 16 65 1320 330
MF72-30D13 30 2.5 0.517 16 65 1320 330
MF72-47D13 47 2 0.810 17 65 880 220
MF72-120D13 120 1.2 2.124 16 65 880 220
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Power ntc thermistor description Power ntc thermistor can be a cost effective device to limit the amount of inrush current in a switching power supply or other devices when the power is first turned on. Power ntc thermistor limits surge current by functioning as a power resistor which drops from a high cold resistance to a low hot resistance when heated by the current flowing through it. Inrush-current limiters power ntc thermistor protect circuits from undesirably high currents, suppressing high inrush current surges, while its resistance remains negligible low during continuous operation. Thanks to their low resistance in the operating state, power thermistor have a considerably lower power dissipation than the fixed resistors frequently used for this application. Inrush current limiting power ntc thermistor application Limiting surge current, suitable for the protection of switch mode power supply, ups power, transformers, motors, various electric heating utensil, energy saving lights, ballast, various power circuit, amplifiers, colored displayer, monitors, color tv, filament protection, etc. Power thermistor components can also be used for the soft starting of motors, for example in vacuum cleaners with continuous currents of up to 20 a. Inrush current limiting power ntc thermistor advantages Low cost solid state device for inrush current supression. Minimise line current distortion and radio noise. Protect switches, rectifier diodes and smoothing capacitors against premature failures. Prevent fuse from blowing in error. Inrush current limiting power ntc thermistor features Resin coated disk thermistor with uninsulated lead-wires. Suitable for both ac and dc circuits up to a voltage of 265 v(rms). Wide range of resistance, current and dimension. Excellent mechanical strength. Suitable for pcb mounting.
MF75 Super Power NTC Thermistor For Audio Power Amplifier Inrush Current Protection I Description Of The MF75 Super Power NTC Thermistor Inrush current is the momentary surge of current created when power is turned on to motors,transformers,power suppliers and heating elements. The more power required by industrial equipment,the larger the inrush current. It can effectively quench the inrush current by means of in series with power NTC thermistor in return circuit of power supply. The thermistors resistance decreases dramatically following the inrush,allowing the steady state curent to flow with very little resistance.This effect provides inrush current protection, yet allows efficiency during normal operation.The power NTC Thermistor produced by Dongguan Ampfort Electronics Co.,Ltd. with large scale,especially MF73T,MF73,MF74,MF75 serial products with big size,which can be applied in such inrush protection with industrial level as industrial robots and automation. II Application Of The MF75 Super Power NTC Thermistor > Nuclear magnetic resonance equipment > Super power audio power amplifier > High power circle transformer > The solar panel arrays with high capacity power inverter > The industrial robot drived by high voltage power supply IV Specification Of The MF75 Super Power NTC Thermistor Body diameter 40mm P/N R25±20%() Thermal sensitive index B±10%(K) Max steady state current Imax(A) Approx R of Max current Rmax() Max power dissipation Pmax(W) Dissipation factor(mW/C) Thermal time constant (s) Max impulse capacitance (uF)240VAC MF75-0.2/55 0.2 2600 55 0.007 30 55 350 8000 MF75-1/45 1 2600 45 0.01 6800 MF75-2/35 2 2600 35 0.014 6800 MF75-5/27 5 3000 27 0.028 4700 MF75-8/22 8 3200 22 0.034 3300 MF75-10/21 10 3200 21 0.038 3300 Body diameter 45mm P/N R25±20%() Thermal sensitive index B±10%(K) Max steady state current Imax(A) Approx R of Max current Rmax() Max power dissipation Pmax(W) Dissipation factor(mW/C) Thermal time constant (s) Max impulse capacitance (uF)240VAC MF75-0.2/70 0.2 2600 70 0.006 45 70 480 11500 MF75-0.5/55 0.5 2600 55 0.007 8000 MF75-1/52 1 2600 52 0.009 8000 MF75-2/45 2 2600 45 0.012 8000 MF75-5/35 5 3000 35 0.025 6800 MF75-10/28 10 3200 28 0.032 4700 Body diameter 50mm P/N R25±20%() Thermal sensitive index B±10%(K) Max steady state current Imax(A) Approx R of Max current Rmax() Max power dissipation Pmax(W) Dissipation factor(mW/C) Thermal time constant (s) Max impulse capacitance (uF)240VAC MF75-0.2/90 0.2 2600 90 0.004 55 90 650 15000 MF75-1/60 1 2600 60 0.008 11500 MF75-2/50 2 2600 50 0.011 11500 MF75-5/40 5 3000 40 0.022 8000 MF75-8/32 8 3200 32 0.028 6800 MF75-10/30 10 3200 30 0.03 6800
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