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