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參數(shù)資料
| 型號： | 04381.25WR |
| 元件分類： | 保險絲 |
| 英文描述： | FAST BLOW ELECTRIC FUSE, 1.25A, 32VDC, 50A (IR), SURFACE MOUNT |
| 封裝： | HALOGEN FREE AND ROHS COMPLIANT |
| 文件頁數(shù)： | 1/3頁 |
| 文件大小： | 532K |
| 代理商： | 04381.25WR |
21
2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Surface Mount Fuses
438 Series
Ceramic Fuse > 438 Series
Please refer to www.littelfuse.com/series/438.html for current information.
438
Series
438 Series – 0603 Fast-Acting Fuse
Description
The 438 Series is a 100% Lead-free, RoHS compliant and
Halogen-free fuse series designed specifically to provide
over-current protection to circuits that operate under high
working ambient temperature up to 150C.
The general design ensures excellent temperature stability
and performance reliability.
The high It values which is typical in the Littelfuse Ceramic
Fuse family ensure high inrush current withstand capability.
Agency Approvals
Agency
Agency File number
Ampere rAnge
e10480
0.250A – 6A
lr29862
0.250A – 6A
Features
Electrical Characteristics for Series
OperatingTemperature
from -55C to +150C
100%Lead-free,RoHS
compliant and Halogen-
free
Suitableforbothleaded
and lead-free reflow /
wave soldering
% of Ampere
rating
Ampere rating
OpeningTime at 25c
100%
0.250A – 6A
4 Hours, Minimum
250%
0.250A – 6A
5 Seconds, Maximum
Applications
Ampere
rating
(A)
Amp
code
max.
Voltage
rating (V)
interrupting rating
nominal
resistance
(Ohms)2
nominal
melting i2t
(A2Sec.)3
nominal Voltage
Drop At rated
current (V)4
nominal power
Dissipation At
rated current (W)
Agency Approvals
0.25
.250
32
50A @ 32VDC
2.024
0.0017
0.550
0.138
x
0.375
.375
32
1.247
0.0041
0.488
0.183
x
0.5
.500
32
0.829
0.0100
0.486
0.243
x
0.75
.750
32
0.466
0.0281
0.378
0.284
x
1
001.
32
0.310
0.0593
0.351
x
1.25
32
0.200
0.0510
0.365
0.456
x
1.5
01.5
32
0.174
0.0902
0.368
0.552
x
1.75
32
0.125
0.1440
0.360
0.540
x
2
002.
32
50A @ 32VDC/12VAC
0.051
0.1490
0.107
0.214
x
2.5
02.5
32
0.0324
0.1977
0.095
0.238
x
3
003.
32
0.0252
0.2922
0.093
0.279
x
3.5
03.5
32
0.0203
0.4752
0.082
0.287
x
4
004.
32
0.0169
0.6920
0.079
0.316
x
5
005.
32
0.0113
0.7398
0.074
0.370
x
6
006.
24
50A @ 24VDC/12VAC
0.0087
1.3838
0.072
0.432
x
Electrical Specifications by Item
Notes:
1. AC Interrupting Rating tested at rated voltage with unity power factor. DC Interrupting
Rating tested at rated voltage with time constant < 0.8 msec.
2. Nominal Resistance measured with < 10% rated current.
3. Nominal Melting It measured at 1 msec. opening time.
4. Nominal Voltage Drop measured at rated current after temperature has stabilized.
HandheldElectronics
LCDDisplays
BatteryPacks
HardDiskDrives
SDMemoryCards
AutomotiveElectronics
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.
Devices designed to be mounted with marking code facing up.
Revised: June 23, 2011
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