Radial Leaded Ultra Big Power NTC Thermistor MF73 For Switching
Power Supply
I Description Of The Ultra Big Power NTC Thermistor MF73
High-Power NTC Thermistors 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.
Additionally, devices that produce alternating current such as
electric motors or transformers can draw several times their steady
state current at switch on. Although this additional draw of inrush
often lasts less than ½ of a normal 60 hertz cycle, that is enough
time to cause possible damage to the equipment.
II Application Of The Ultra Big Power NTC Thermistor MF73
* All kinds of power supply,UPS power supply,Switching power supply
* EV charger,charging pile
* Motor driver,superpower server motor driver,logic controller
* High power plasma electric welder,cutting machine,super power
lightning lamp
* Nuclear managetic resonance equipment,super power audio power
amplifier,high circle transformer
* The solar panel arrays with high capacity power inverter
* The industrial robot drived by high voltage power supply,
intelligent electric cabinet with low voltage.
III Dimension Of The Ultra Big Power NTC Thermistor MF73
| Body size | Φ40 | Φ45 | Φ50 |
| (Dmax)Diameter | 45 | 50 | 55 |
| (Tmax)/Thickness | 18 | 18 | 18 |
| (F±1.5)/Pitch | 22.5 | 22.5 | 22.5 |
| (L±2)/Lead length | 20 | 20 | 20 |
| (W±0.2)/Lead width | 8 | 8 | 8 |
| Lead thickness(H±0.1) | 1.0 | 1.0 | 1.0 |
| Body size | Φ40 | Φ45 | Φ50 |
| (Dmax)/Diameter | 45 | 50 | 55 |
| (Tmax)/Thickness | 18 | 18 | 18 |
| (F±1.5)/Pitch | 22.5 | 22.5 | 22.5 |
| (L±2)/Lead length | 30 | 30 | 30 |
| (W±0.2)/Lead width | 10 | 10 | 10 |
| Lead thickness(H±0.1) | 1.0 | 1.0 | 1.0 |
| Width of lower lead (W1±0.2) | 6 | 6 | 6 |
IV Specification Of The Ultra Big Power NTC Thermistor MF73
Body diameter Φ40mm
| P/N | R25±20%(Ω) | Thermal sensitive index B±10%(K) | Max steady state current Imax(A) | Approx R of Max current Rmax(Ω) | Max power dissipation Pmax(W) | Thermal time constant (mW/C) | Thermal time constant (s) | Max impulse capacitance (uF)240VAC |
| MF73-0.2/50 | 0.2 | 2600 | 50 | 0.007 | 25 | ≥55 | ≤350 | 8000 |
| MF73-0.5/40 | 0.5 | 2600 | 40 | 0.008 | 6800 |
| MF73-3/28 | 3 | 2800 | 28 | 0.02 | 6800 |
| MF73-5/25 | 5 | 3000 | 25 | 0.028 | 4700 |
| MF73-8/20 | 8 | 3200 | 20 | 0.034 | 3300 |
| MF73-10/19 | 10 | 3200 | 19 | 0.038 | 3300 |
Body diameter Φ45mm
| P/N | R25±20%(Ω) | Thermal sensitive index B±10%(K) | Max steady state current Imax(A) | Approx R of Max current Rmax(Ω) | Max power dissipation Pmax(W) | Thermal time constant (mW/C) | Thermal time constant (s) | Max impulse capacitance (uF)240VAC |
| MF73-0.2/65 | 0.2 | 2600 | 65 | 0.006 | 30 | ≥70 | ≤480 | 11500 |
| MF73-0.5/50 | 0.5 | 2600 | 50 | 0.007 | 8000 |
| MF73-2/40 | 2 | 2600 | 40 | 0.012 | 8000 |
| MF73-5/30 | 5 | 3000 | 30 | 0.025 | 6800 |
| MF73-10/24 | 10 | 3200 | 24 | 0.032 | 4700 |
Body diameter Φ50mm
| P/N | R25±20%(Ω) | Thermal sensitive index B±10%(K) | Max steady state current Imax(A) | Approx R of Max current Rmax(Ω) | Max power dissipation Pmax(W) | Thermal time constant (mW/C) | Thermal time constant (s) | Max impulse capacitance (uF)240VAC |
| MF73-0.2/80 | 0.2 | 2600 | 80 | 0.004 | 36 | ≥90 | ≤650 | 15000 |
| MF73-0.5/60 | 0.5 | 2600 | 60 | 0.006 | 11500 |
| MF73-1/56 | 1 | 2600 | 56 | 0.008 | 11500 |
| MF73-3/40 | 3 | 2800 | 40 | 0.015 | 11500 |
| MF73-5/35 | 5 | 3000 | 35 | 0.022 | 8000 |
| MF73-6.8/32 | 6.8 | 3000 | 32 | 0.025 | 8000 |
| MF73-10/27 | 10 | 3200 | 27 | 0.03 | 6800 |
V Characteristics Of The Ultra Big Power NTC Thermistor MF73
◎ Reliable Configuration and convenient installment
◎ Have the strongest capability of surge current protection and
energy absorption
◎ Maximum steady state operating current
◎ Longevity of service,high reliability
VI Ampfort Advantage Of The Ultra Big Power NTC Thermistor MF73
* Product R&D and production Base
* Only direct factory marketing windows
* On behalf of buy ,inspection ,delivery , payment
* Low cost shippment advisor
* Provide technical supoort & advices freely for whole course
VII Key Benefits Of The Ultra Big Power NTC Thermistor MF73
* High Power NTC Thermistor Key Benefits:
* Recognized By Underwriters Laboratories For Ensured Safety
* Designed To Withstand High Steady Sate Current
* Absorbs And Minimizes High Input Energy
* Cost Effective One Component Solution To Inrush Current
* Wide Temperature Range Of Operation
VIII About AMPFORT Of The Ultra Big Power NTC Thermistor MF73
Ampfort Electronics, National Hi-Tech Enterprise and drafting
member of “National Thirteen Five Plan”,specilized in manufacturing
sensitive elements as NTC/PTC thermistor,NTC temperature sensor and
metal oxide varistor. With unique process and advanced technology ,
product produced with high precision,high reliability,high
stability etc outstanding advantages, becoming leading level in the
industry. Based on current standard power type MF72 NTC thermistors
and “The engineer and research technology center of NTC thermistor
ceramic material ” ,applied with new
materials/technology/process/equipment,as well as unremitting
efforts, innovated MF73T,MT73,MF74,MF75 etc. new power type NTC
thermistor and mass production to be realized,key technology has
been got big breakthrough and performances has been increased a
lot.We have our own proprietary intellectual property right and
dozens of patents, it can provide inrush protection in industrial
level application and it is originate in domestic !
A glance at workshop and R&D center
16 years’ experience R&D center and modern factories cover an
areas of 120 mu .
VIIII Package Details Of The Ultra Big Power NTC Thermistor MF73
little box: 18*11.5*8cm
Whole box : 28*19*7cm
Clamshell box: 28.3*19*7.3cm 0.002CBM
Heightening box:28*19.5*11.5cm 0.004CBM
Clamshell box:28.3*19*7.3 0.004CBM
Small box: 30*22*24.5cm 0.004CBM
Big box: 40.5*31*24.5cm 0.031CBM
Braid box: Braid boxcm 0.052CBM
Tags: Spot Welding NTC thermistors | Mini Sensors With Ben|
High-power NTC Thermistor| Surge Current Protection| Thermistor
Protection | Inrush current limiter| NTC Thermistors| NTC| Negative
Temperature Coefficient Thermistor| Negative Temperature
Coefficient
