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0437SWR

更新时间： 2024-11-27 06:19:43
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力特 - LITTELFUSE /
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Surface Mount Fuses

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0437SWR 数据手册

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Surface Mount Fuses  
Ceramic Fuse > 437 Series  
437 Series – 1206 Fast-Acting Fuse  
Description  
This 100% Lead-free, RoHS compliant and Halogen-free  
fuse series has been designed specifically to provide over  
current protection to circuits that see high working ambient  
temperatures (up to 150ºC).  
The general design ensures excellent temperature stability  
and performance reliability.  
In addition to this, the high I²t values typical of the  
Littelfuse Ceramic Fuse family ensure high inrush current  
withstand capability.  
Features  
Agency Approvals  
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AGENCY  
AGENCY FILE NUMBER  
AMPERE RANGE  
0.250A ~ 8A  
from -55ºC to +150ºC  
and lead-free reflow /  
wave soldering  
E10480  
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RoHS compliant  
LR29862  
0.250A ~ 8A  
Applications  
Electrical Characteristics for Series  
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tꢀ 4FSWFST  
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tꢀ %BUBꢀ.PEFNT  
% of Ampere  
Ampere Rating  
OpeningTime at 25ºC  
Rating  
100%  
250%  
350%  
350%  
250mA - 8A  
750mA - 8A  
4 hours, Minimum  
5 seconds, Maximum  
5 seconds, Maximum  
1 second, Maximum  
250mA -500mA  
750mA - 8A  
Electrical Specifications by Item  
Agency Approvals  
Ampere  
Rating  
(A)  
Max.  
Voltage  
Rating (V)  
Nominal  
Nominal Nominal Voltage Nominal Power  
Amp  
Code  
Interrupting Rating  
Resistance Melting I2t  
Drop At Rated  
Dissipation At  
(Ohms)2  
(A2Sec.)3  
Current (V)4  
Rated Current (W)  
250mA .250  
375mA .375  
500mA .500  
750mA .750  
125  
125  
63  
63  
63  
63  
63  
63  
63  
32  
32  
32  
32  
32  
32  
32  
2.290  
1.330  
0.908  
0.665  
0.360  
0.318  
0.209  
0.0703  
0.058  
0.043  
0.033  
0.027  
0.022  
0.016  
0.010  
0.0084  
0.003  
0.010  
0.018  
0.064  
0.100  
0.256  
0.324  
0.075  
0.144  
0.225  
0.400  
0.576  
1.024  
1.936  
4.900  
6.400  
0.78  
0.60  
0.52  
0.45  
0.41  
0.40  
0.39  
0.27  
0.17  
0.14  
0.15  
0.16  
0.16  
0.09  
0.11  
0.067  
0.195  
0.225  
0.260  
0.335  
0.415  
0.496  
0.579  
0.474  
0.345  
0.363  
0.462  
0.560  
0.618  
0.484  
0.760  
0.539  
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
50 A @ 125 V AC/DC  
1A  
1.25A  
1.5A  
1.75A  
2A  
001.  
1.25  
01.5  
1.75  
002.  
02.5  
003.  
03.5  
004.  
005.  
007.  
008.  
50 A @ 63 V AC/DC  
2.5A  
3A  
3.5A  
4A  
50 A @ 32 V AC/DC  
5A  
7A  
8A  
Notes:  
1. AC Interrupting Rating tested at rated voltage with unity power factor. DC Interrupting  
Devices designed to carry rated current for 4 hours minimum. It is recommended that  
devices be operated continuously at no more than 80% rated current. See “Temperature  
Rerating Curve”for additional rerating information.  
Rating tested at rated voltage with time constant < 0.8 msec.  
2. Nominal Resistance measured with < 10% rated current.  
3. Nominal Melting I²t measured at 1 msecs. opening time.  
Devices designed to be mounted with marking code facing up.  
4. Nominal Voltage Drop measured at rated current after temperature has stabilized.  
© 2009 Littelfuse, Inc.  
437 Series  
17  
Revised: August 3, 2009  
Specifications are subject to change without notice.  
Please refer to www.littelfuse.com/series/437.html for current information.  
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