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30 Amp Fast Acting 437 Cross SM 125V Thin Film Surface Mount Fuses 1206

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    Buy cheap 30 Amp Fast Acting 437 Cross SM 125V Thin Film Surface Mount Fuses 1206 from wholesalers
     
    Buy cheap 30 Amp Fast Acting 437 Cross SM 125V Thin Film Surface Mount Fuses 1206 from wholesalers
    • Buy cheap 30 Amp Fast Acting 437 Cross SM 125V Thin Film Surface Mount Fuses 1206 from wholesalers
    • Buy cheap 30 Amp Fast Acting 437 Cross SM 125V Thin Film Surface Mount Fuses 1206 from wholesalers
    • Buy cheap 30 Amp Fast Acting 437 Cross SM 125V Thin Film Surface Mount Fuses 1206 from wholesalers
    • Buy cheap 30 Amp Fast Acting 437 Cross SM 125V Thin Film Surface Mount Fuses 1206 from wholesalers

    30 Amp Fast Acting 437 Cross SM 125V Thin Film Surface Mount Fuses 1206

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    Brand Name : AMPFORT
    Model Number : R12.000
    Certification : UL,REACH
    Price : Negotiable
    Payment Terms : T/T, Western Union, MoneyGram
    Supply Ability : 100,000,000 Pieces Per Month
    Delivery Time : 7-10 Workdays
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    30 Amp Fast Acting 437 Cross SM 125V Thin Film Surface Mount Fuses 1206


    437 Cross SMT 1206 Fast Blow Thin Film SMD Fuse 125V 72V 63V 32V 0.25A-30A


    Description Of The SMT 1206 Fast Blow Thin Film SMD Fuse 125V 72V 63V 32V 0.25A-30A


    1206 Fast blow smd fuse designed for overcurrent protection on PCB where will bring high

    working ambient temperature and high inrush current withstand capability with high I²t values typical.

    A precise melting time offers ultimate protection for sensitive electronic components, while a reflow

    soldering process allows surface mount fuses to be directly attached to printed circuit boards.

    The SMD fuse is compatible with a wide range of circuit designs, making this fuse the best choice

    for all types of consumer electronic applications.


    Features Of The SMT 1206 Fast Blow Thin Film SMD Fuse 125V 72V 63V 32V 0.25A-30A


    • Operating Temperature from -55ºC to +125ºC
    • 100% Lead-free, HalogenFree and RoHS compliant
    • Suitable for both leaded and lead-free reflow / wave soldering
    • UL Recognized to UL/cUL

    • Wide current range 0.25A-30A

    • High voltage up to 125V

    • High inrush current withstand capability

    • High I²t values

    • Fast blow


    Fuse Cutoff Time Standard Of The SMT 1206 Fast Blow Thin Film SMD Fuse 125V 72V 63V 32V 0.25A-30A


    Rated Current% of Amp Rating
    Opening Time
    250mA~30A100%4hours, min
    1A~3A200%1.0s - 60 s
    1A~5A250%5.0s max
    1A~5A300%0.1s - 3.0 s
    250mA~750mA350%5.0s max
    6A~30A350%5.0s max
    250mA~30A1000%0.2ms - 20.0 ms

    Application Of The SMT 1206 Fast Blow Thin Film SMD Fuse 125V 72V 63V 32V 0.25A-30A


    • LCD Displays

    • Servers

    • Printers

    • Scanners

    • Data Modems

    • Power supplies

    • LED driver

    • UPS

    • EMS

    • BMS


    Specification Of The SMT 1206 Fast Blow Thin Film SMD Fuse 125V 72V 63V 32V 0.25A-30A


    Specification

    Part

    No.

    Rated

    Voltage

    DC

    Rated Current

    (A)

    Breaking

    Capacity 1

    Typical

    Cold. Resistance (mOhms) 2

    Typical Voltage Drop (mV)

    Typical Pre-Arcing

    I2t

    (A2Sec) 3DC

    Aplha Marking
    72V63V32V24V
    R12.000 0.2572V63V32V24V250mA100A100A100A300A360814070.0004.25
    R12.000 0.375375mA18827180.0008E
    R12.000 0.5500mA10286500.00220.5
    R12.000 0.75750mA6016160.0057.75
    R12.000 11A4905100.10H
    R12.000 1.251.25A1651840.021
    R12.000 1.51.5A2403670.15K
    R12.000 22A1443160.41N
    R12.000 2.52.5A832400.65O
    R12.000 33A531871.39P
    R12.000 3.53.5A401801.68R
    R12.000 44A351731.73S
    R12.000 4.5/4.5A-271642.62X
    R12.000 55A221412.89T
    R12.000 6.56.5A161403.46.5
    R12.000 77A121405.687
    R12.000 10/10A-4.4592.1610
    R12.000 1212A3.8677.1112
    R12.000 1515A2.96623.8915
    R12.000 2020A1.66047.1720
    R12.000 2525A1.4573225
    R12.000 3030A1684330

    Does a fuse resistor work the same as a fuse?


    A resistor is available for a certain load. If the current flowing through the resistor goes beyond the limit, it will be burned and the circuit will be open. At this point, a resistor is similar to a fuse, i.e., the current can be interrupted upon overcurrent. This seems like a fuse function. In this way, some manufacturers change the fuse in its original design to cheap fuse resistors to keep cost down, presenting customers with superficial security.

    However, is a fuse resistor able to substitute a fuse to have the same function? The answer is obviously no.

    As we know, a good fuse must possess three essential functions: protection, load bearing and safety, while a fuse resistor may not be able to work well in all three aspects.

    The protection function covers overload protection and short circuit protection. Specifically, a fuse must operate within the specified time when an unexpected overcurrent, even an extremely short overcurrent, occurs in the circuit, so as to protect the circuit and parts. A fuse resistor may not be as accurate as the fuse in terms of technical parameters like starting time and operation duration, and thus cannot ensure overcurrent protection. It only works to some extent for short current.

    The load bearing function of a fuse is ensured by the I2t value, which enables a fuse to withstand pulse shocks of a certain energy from switching operations. We should calculate and evaluate this value before fuse selection. Nevertheless, a fuse resistor has no similar technical indexes, so it may be blown by a pulse if the value is small or fail to protect the circuit if it is large.

    As for safety, a fuse can be assured through rated voltage, interrupting capacity and other indexes, especially safety compliance certification by an authorized third party. A fuse resistor is not a safety component, so it does not need certification. Its safety is therefore questionable. Furthermore, it has insufficient protection, and it's hard to ensure no hazards occur during the breaking process.

    In conclusion, a fuse resistor may blow upon overcurrent, but it cannot work the same as a fuse. In most applications, it will not be appropriate to replace a fuse with a fuse resistor to cut cost.
    Quality 30 Amp Fast Acting 437 Cross SM 125V Thin Film Surface Mount Fuses 1206 for sale
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