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250V 5A Square Ceramic Body Fast Acting Fuses Surface Mount 1808 6125 2410
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Model Number:SEF1500
Certification:CQC,UL,CUL,ROHS,REACH
Price:0.028~0.3USD/PC
Payment Terms:T/T, Western Union
Supply Ability:100000000PCS Per Month
Delivery Time:5-7 Days
Company Data
Verified Supplier
Contact Person
Anna
Business Type:
Manufacturer Exporter
Officials:
Room 810, Unit 2, Building 5, Huixing Commercial Center, Dongsheng Road No.1, Zhongshan Dong, Shilong Town Dongguan, GUANGDONG, 523326 CN
Quality:
Quality Certifitation Available
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Product Details
Company Profile
Product Details
Brand New 250V 5A Square Ceramic Body Fast Acting Surface Mount Fuses 1808 6125 2410
Advantages
Fast-acting Type (Fast blow-F)
Small size(6.1mm*2.5mm)
Wide range of current rating available
Wide operating temperature range
Low temperature de-rating
RoHS compliant/REACH
Tape and Reel for automatic placement
Conflict free metals
Application
| • LED lighting | • Notebook PC | • Battery devices | • LCD/PDP devices |
| • LCD backlight inverter | • Portable Devices | • Power supply | • Networking devices |
| • PC server | • Cooling fan system | • Storage system | • Telecom system |
| • Wireless base station | • White goods | • Game console | • Office equipment |
| • Digital camera | • Industrial equipment | • Medical equipment | • Automotive devices |
Certification
| Agency | Ampere Range | Agency File Number |
| UL | 50mA ~ 7A | E340427(JDYX2) |
| CUL | 50mA ~ 7A | E340427(JDYX8) |
| CQC | 500mA/1A/2A | CQC18012206754 |
| ROHS | 6125 Series | SZC18111684512 |
| REACH | 6125 Series | SZC18030584513-3 |
Melting Features
| % of Ampere Rating(In) | Blowing Time |
| 100% * In | 4 hours Min |
| 200% * In | 120 sec Max |
| 1000% * In | 10ms Min |
Specification
| Catalog | Ampere | Voltage | Breaking | Nominal Cold | I2TMelting |
| No. | Rating | Rating | Capacity | Resistance(Ohms) | Integral(A2.S) |
| SEF0200 | 200mA | 250VAC | 50A@300VAC 50A@250VAC 200A@125VAC | 0.96 | 0.148 |
| SEF0250 | 250mA | 0.86 | 0.145 | ||
| SEF0300 | 300mA | 0.62 | 0.162 | ||
| SEF0315 | 315mA | 0.55 | 0.189 | ||
| SEF0375 | 375mA | 0.47 | 0.2 | ||
| SEF0400 | 400mA | 0.38 | 0.238 | ||
| SEF0500 | 500mA | 0.32 | 0.275 | ||
| SEF0600 | 600mA | 0.285 | 0.47 | ||
| SEF0630 | 630mA | 0.256 | 0.566 | ||
| SEF0700 | 700mA | 0.208 | 0.805 | ||
| SEF0750 | 750mA | 0.175 | 1.24 | ||
| SEF0800 | 800mA | 0.155 | 1.88 | ||
| SEF1100 | 1A | 0.148 | 3.5 | ||
| SEF1125 | 1.25A | 0.102 | 4.76 | ||
| SEF1150 | 1.5A | 0.085 | 6.305 | ||
| SEF1200 | 2A | 0.044 | 8.95 | ||
| SEF1250 | 2.5A | 0.043 | 16.025 | ||
| SEF1300 | 3A | 0.033 | 21.56 | ||
| SEF1315 | 3.15A | 0.029 | 22.75 | ||
| SEF1350 | 3.5A | 0.027 | 27.05 | ||
| SEF1400 | 4A | 0.025 | 31.808 | ||
| SEF1500 | 5A | 0.019 | 40.25 | ||
| SEF1600 | 6A | 0.018 | 67.245 | ||
| SEF1630 | 6.3A | 0.017 | 73.55 | ||
| SEF1700 | 7A | 0.015 | 76.28 |
Dimension (mm)
What's the difference between the slow blow and fast acting fuse in
terms of performance and application?
A slow blow fuse is different from a fast acting fuse in its capability to withstand transient pulse currents, i.e., it can withstand the surge current upon power-on/off, thus ensuring the equipment works normally. Therefore, slow blow fuses are often called time-delay fuses. Technically, a slow blow fuse features a higher I2t value, and it requires more energy to blow, so it is more capable of withstanding pulses compared with a fast acting fuse of same rated current.
When an overcurrent occurs in a circuit, the breaking time of a slow blow fuse takes longer than that of a fast acting fuse because of the larger I2t. Is it less protected this way as some people are worried? The answer is no. Once the circuit fails, the overcurrent will last and corresponding energy released will go beyond the I2t of the fuse until it blows out. The timing difference of slow blowing and fast acting is not significant to their protection. Slow blowing will affect the protection performance only when sensitive components existing in the protected circuit need to be protected.
Due to the previous difference, slow blow and fast acting fuses are applied to different circuits. Fast acting fuses must be used in purely resistive circuits (no or fewer surges) or the circuits where IC and other sensitive components need to be protected, while slow blow fuses are preferably used in capacitive or sensitive circuits where surges occur upon power-on/off and power input/output. Apart from circuits for IC protection, most applications with fast acting fuses can be replaced with slow blow ones to enhance anti-surge capability. Contrarily, replacement of applications with slow blow fuses to fast acting ones may cause the fuse to break as soon as the equipment is switched on and fails to work.
Furthermore, economic consideration is also an indirect factor for selection because a slow blow fuse is much expensive than a fast acting one.
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 is 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.
Company Profile
Guangdong Uchi Electronics Co.,Ltd
Uchi was established in 2006 in Dongguan, China.
After years of development, Uchi has become a large scale hi-tech
enterprise that specialized in development and production of
complete series of MOV,PTC, NTC series, PPTC series, Fuse(ALL
TYPE),Resistor、integrated circuit 、 Capacitor, surge protector and
protective devices of lightning protection products. It ranks front
in the industry and has heartquarter in Hong Kong. With its
excellent technology and quality products, Uchi has won wide
recognition of overseas customers. Saini Impex PVT.LTD is our
authorized sole distributor in india .
China's leading enterprise of circuit protection components
Our strength ：
A large number of product series in our factory have passed the
certification of various international standards
Factory Tour ：
Advanced equipment, lean production
Uchi boasts with a production base that covers an area of nearly
15000 square meters.
We successively imported high-tech fully automated production
equipments and high precision testing instruments and have put into
production to realize the automation, large scale and
standardization.
Uchi has a galaxy of hi-tech talent teams headed up by national
class experts to engage in the work of product development, product
quality control, sales andservice technical support, etc., and has
successively obtained tens of certificates of appearance patents,
utility patents and inventions.
To guarantee the quality, we successfully passed the certification
of ISO9001:2008 quality management system, scientific and efficient
managing mode to carry out lean production and form scientific and
efficient quality control system. The products are certified with
UL, CUL, TUV, VDE, CSA and SGS, RACH 73 environmentally friendly
testing certifications.
Exquisite quality at customers' favor
Uchi is an export membership of Alibaba with free import and export rights. It is appraised as Guangdong Famous Star Enterprise and Dongguan Private Enterprise. Our products have doubled and redoubled to provide more kinds and high quality and reliable products and service. Our products mainly consist of:
Metal Oxide Varistor
DIP Varistor & SMD Varistor
Thermally Protected Varistor
DC-Link Capacitor for New energy vehicles supporting the HEVEV
Automotive Fuse Links for EV Plugin HEV FCEV
PTC Thermistor
NTC Thermistor
PPTC Resettable Fuse
Thermal Fuse
Auto Blade Fuse
Glass Fuses
Metal Film Resistor
Carbon Film Resistor
Cement Resistor
NTC Temperature Sensor
CDS Photoconductive Cell
Our products are widely used in New energy vehicles, home appliance, medical equipment, office equipment, communication
equipment, phone battery, electronic calendar, electronic
thermometer and temperature controller to cover military
telecommunications, IT, automobile and consumer electronic fields.
Cooperation with good faiths to win in the market.
Excellent quality sincere service is the key to the success of
Uchi.
In the future Uchi will still stick to the tenets of "Quality
first, customer foremost." "First class quality, first class
service and customersatisfaction" to manufacture the high quality,
technically advanced and reasonable prices products. We hope to
trigger with global partners the revolution in resistor products.
We cordially welcome friends from home and abroad to visit us for
guidance and cooperation.
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