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044003.5

更新时间： 2024-11-06 14:56:31
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力特 - LITTELFUSE 过电流保护
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3页 386K
描述
440系列为100%无铅、符合RoHS标准且无卤素的保险丝产品，专用于工作环境温度极高（最高可达150°C）和励磁涌流很高的电路过电流保护。 通用型设计既可确保产品具有卓越的高温稳定性，又能提供

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044003.5 数据手册

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Fuse Datasheet  
440 Series  
1206 High I2t Fuse  
RoHS Pb  
Description  
The 440 Series is a 100% RoHS Compliant, lead-free and halogen-  
free fuse series designed specifically to provide over-current  
protection to circuits that operate under high working ambient  
temperatures up to 150ºC and high inrush currents. The general  
design ensures excellent temperature stability and performance  
reliability. This high I2t fuse series is designed to have ultra high  
inrush current withstand capability to avoid nuisance fuse open.  
Features and Benefits  
■ OperatingTemperature from  
■ Ultra high I2t values  
-55ºC to +150ºC  
■ Recognized to UL/CSA/NMX  
■ RoHS compliant, lead-free and  
248-1 and UL/CSA/NMX 248-14  
halogen-free  
■ Suitable for both leaded  
and lead-free reflow / wave  
soldering  
Additional Information  
Applications  
■ LCD Displays  
■ Servers  
■ Scanners  
■ Data Modems  
■ Hard Disk Drives  
■ Notebook Computers  
■ Printers  
Resources  
Accessories  
Samples  
Electrical Characteristics for Series  
Agency Approvals  
% of Ampere Rating Ampere Rating  
OpeningTime at 25ºC  
Agency  
Agency File Number  
Ampere Range  
100%  
350%  
0.25A - 8A  
0.25A - 8A  
4 hours, Minimum  
5 secs., Maximum  
E10480  
29862  
0.25A - 8A  
0.25A - 8A  
Electrical Specifications by Item  
Ampere  
Rating  
(A)  
Nominal  
Resistance  
(Ohms)1  
Nominal  
Melting I2t  
(A2Sec.)2  
NominalVoltage  
Drop At Rated  
Current (V)3  
Nominal Power  
Dissipation At Rated  
Current (W)  
Agency Approvals  
Amp Max.Voltage Interrupting Rating  
Code  
Rating (V)  
(AC/DC)  
0.250  
0.375  
0.500  
0.750  
1.00  
1.25  
1.50  
1.75  
2.00  
2.50  
3.00  
3.50  
4.00  
5.00  
7. 0 0  
.250  
.375  
.500  
.750  
001.  
1.25  
01.5  
1.75  
002.  
02.5  
003.  
03.5  
004.  
005.  
0 0 7.  
008.  
125  
125  
63  
63  
50  
50  
50  
32  
32  
32  
32  
32  
32  
32  
32  
32  
2.140  
1.216  
0.00649  
0.01455  
0.02642  
0.09312  
0.21054  
0.379  
0.50652  
0.4000  
0.4700  
0.8200  
1.2470  
2.3800  
3.136  
0.5260  
0.4993  
0.4831  
0.3983  
0.3457  
0.3240  
0.3215  
0.0777  
0.0792  
0.0747  
0.0742  
0.0757  
0.0709  
0.0654  
0.0696  
0.0655  
0.132  
0.187  
0.242  
0.299  
0.346  
0.405  
0.482  
0.136  
0.158  
0.187  
0.223  
0.265  
0.284  
0.327  
0.487  
0.524  
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  
50 A @ 63 V AC/DC  
0.8140  
0.4624  
0.3096  
0.2265  
0.1759  
0.0450  
0.0385  
0.02850  
0.02252  
0.01845  
0.01553  
0.0120  
0.00753  
0.00634  
50 A @ 50 VAC/DC  
50 A @ 32 V AC/DC  
5.949  
10.38  
13.03  
8.00  
Notes:  
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 Derating Curve”for additional derating  
information.  
1. Nominal Resistance measured with < 10% rated current.  
2. Contact Littelfuse if application transient surges are less than 1 ms.  
3. Nominal Voltage Drop measured at rated current after temperature has stabilized.  
Devices designed to be mounted with marking code facing up.  
© 2023 Littelfuse, Inc.  
Specifications are subject to change without notice.  
1
Revised: GD. 02/21/23  
123

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