043802.5WR [LITTELFUSE]
Surface Mount Fuses Ceramic Fuse > 438 Series; 表面贴装保险丝陶瓷保险丝\u003e 438系列
| 型号： | 043802.5WR |
| 厂家： | 
LITTELFUSE |
| 描述： | Surface Mount Fuses Ceramic Fuse > 438 Series |
| 文件： | 总3页 (文件大小：705K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Surface Mount Fuses
Ceramic Fuse > 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 150ºC.
The general design ensures excellent temperature stability
and performance reliability.
The high I²t values which is typical in the Littelfuse
Ceramic Fuse family ensure high inrush current withstand
capability.
Features
Agency Approvals
•ꢀ OperatingꢀTemperatureꢀ •ꢀ Suitableꢀforꢀbothꢀleadedꢀ
AGENCY
AGENCY FILE NUMBER
AMPERE RANGE
0.250A – 6A
from -55ºC to +150ºC
and lead-free reflow /
wave soldering
E10480
•ꢀ 100%ꢀLead-free,ꢀRoHSꢀ
compliant and Halogen-
free
LR29862
0.250A – 6A
Applications
•ꢀ HandheldꢀElectronics
•ꢀ LCDꢀDisplays
•ꢀ HardꢀDiskꢀDrives
Electrical Characteristics for Series
•ꢀ SDꢀMemoryꢀCards
•ꢀ AutomotiveꢀElectronics
% of Ampere
Ampere Rating
Opening Time at 25ºC
•ꢀ BatteryꢀPacks
Rating
100%
250%
0.250A – 6A
0.250A – 6A
4 Hours, Minimum
5 Seconds, Maximum
Electrical Specifications by Item
Agency Approvals
Ampere
Rating
(A)
Max.
Nominal
Nominal Nominal Voltage Nominal Power
Amp
Code
Voltage
Interrupting Rating Resistance Melting I2t
Drop At Rated
Dissipation At
Rating (V)
(Ohms)2
(A2Sec.)3
Current (V)4
Rated Current (W)
0.25
0.375
0.5
0.75
1
1.25
1.5
1.75
2
2.5
3
3.5
4
.250
.375
.500
.750
001.
1.25
01.5
1.75
002.
02.5
003.
03.5
004.
005.
006.
63
63
63
63
63
63
63
63
32
32
32
32
32
32
24
2.024
1.247
0.829
0.466
0.310
0.200
0.174
0.125
0.051
0.0324
0.0252
0.0203
0.0169
0.0113
0.0087
0.0017
0.0041
0.0100
0.0281
0.0593
0.0510
0.0902
0.1440
0.1490
0.1977
0.2922
0.4752
0.6920
0.7398
1.3838
0.550
0.488
0.486
0.378
0.351
0.365
0.368
0.360
0.107
0.095
0.093
0.082
0.079
0.074
0.072
0.138
0.183
0.243
0.284
0.351
0.456
0.552
0.540
0.214
0.238
0.279
0.287
0.316
0.370
0.432
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
50A @ 63VDC
50A @ 32VAC
50A @ 32VDC/12VAC
50A @ 24VDC/12VAC
5
6
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
Rerating Curve”for additional rerating information.
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.
Devices designed to be mounted with marking code facing up.
3. Nominal Melting I²t measured at 1 msec. opening time.
4. Nominal Voltage Drop measured at rated current after temperature has stabilized.
© 2009 Littelfuse, Inc.
438 Series
1
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/438.html for current information.
Revised: February 15, 2012
Surface Mount Fuses
Ceramic Fuse > 438 Series
Temperature Rerating Curve
Average Time Current Curves
100
10
140
120
100
80
1
60
40
-65 -45
-25
-5
15
35
55
75
95
115 135 155
0.1
TEMPERATURE (°C)
Note:
0.01
1. Rerating depicted in this curve is in addition to the standard rerating of 20% for
continuous operation.
Example:ꢀ
For continuous operation at 75 degrees celsius, the fuse should be rerated as follows:
0.001
I = (0.80)(0.85)IRAT = (0.68)IRAT
0.1
1
10
100
CURRENT IN AMPERES
Soldering Parameters
tP
Reflow Condition
- Temperature Min (T
Pbꢀ–ꢀfreeꢀassembly
TP
Critical Zone
Ramp-up
TL to TP
)
150°C
s(min)
TL
TS(max)
Pre Heat - Temperature Max (T
)
200°C
tL
s(max)
- Time (Min to Max) (ts)
60 – 180 seconds
Ramp-down
Average Ramp-up Rate (Liquidus Temp
(TL) to peak)
Preheat
3°C/second max.
TS(min)
tS
TS(max) to TL - Ramp-up Rate
5°C/second max.
- Temperature (TL) (Liquidus) 217°C
- Temperature (tL) 60 – 150 seconds
25
Reflow
time to peak temperature
(t 25ºC to peak)
Time
Peak Temperature (TP)
260+0/-5 °C
Time within 5°C of actual peak
Temperature (tp)
10 – 30 seconds
Ramp-down Rate
6°C/second max.
8 minutes max.
260°C
Time 25°C to peak Temperature (TP)
Do not exceed
Wave Soldering
260°C, 10 seconds max.
© 2009 Littelfuse, Inc.
438 Series
2
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/438.html for current information.
Surface Mount Fuses
Ceramic Fuse > 438 Series
Product Characteristics
Moisture Resistance
MIL-STD-202, Method 106G
Body: Advanced Ceramic
Terminations: Ag / Ni / Sn (100% Lead-free)
Element Cover Coating: Lead-free Glass
Materials
MIL-STD-202, Method 107G,
ConditionꢀB-3
Thermal Shock
MIL-STD-202,ꢀMethodꢀ213B,ꢀ
Condition A
Mechanical Shock
Vibration
Moisture
Sensitivity Level
IPC/JEDECꢀJ-STD-020C,ꢀLevelꢀ1
MIL-STD-202, Method 201A
Solderability
Humidity
IPC/EIC/JEDECꢀJ-STD-002B,ꢀConditionꢀB
MIL-STD-202,ꢀMethodꢀ103B,ꢀConditionsꢀD
Vibration,
High Frequency
MIL-STD-202, Method 204D,
Condition D
Dissolution of
Metallization
IPC/EIC/JEDECꢀJ-STD-002B,ꢀ
Condition D
Resistance to
Solder Heat
MIL-STD-202,ꢀMethodꢀ210F,ꢀConditionꢀB
Terminal Strength
IECꢀ60127-4
Dimensions
Part Marking System
Amp Code Marking Code
ꢀ.53ꢀ +/- ꢀ.15ꢀ
[ꢀ.ꢀ21 +/- ꢀ.ꢀꢀ6ꢁ
1.54 ꢀ.15ꢀ
[ꢀ.ꢀ61 ꢀ.ꢀꢀ6ꢁ
.250
.375
.500
.750
001.
1.25
01.5
1.75
002.
02.5
003.
03.5
004.
005.
006.
D
E
F
ꢀ.05 ꢀ.15ꢀ
[ꢀ.ꢀ33 ꢀ.ꢀꢀ6ꢁ
G
H
J
K
L
ꢀ.5ꢀ2 ꢀ.ꢀ0ꢀ
[ꢀ.ꢀ2ꢀ ꢀ.ꢀꢀ3ꢁ
N
O
P
R
S
T
ꢀ.432 +/- ꢀ.15ꢀ
[ꢀ.ꢀ17 +/- ꢀ.ꢀꢀ6ꢁ
U
ꢀ.6ꢀ
[ꢀ.ꢀ24ꢁ
ꢀ.74
[ꢀ.ꢀ29ꢁ
Part Numbering System
0438 005. W R
1.ꢀꢀ
[ꢀ.ꢀ39ꢁ
SERIES
PACKING CODE
1.94
[ꢀ.ꢀ76ꢁ
Rꢀ=ꢀReelꢀPack
AMP CODE
QUANTITY CODE
W = 3000 pcs
Packaging
Quantity &
Packaging Code
Packaging Option
Packaging Specification
Quantity
8mm Tape and Reel
EIA-481,ꢀIECꢀ60286,ꢀPartꢀ3ꢀ
3000
WR
© 2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/438.html for current information.
438 Series
3
相关型号：
04381.75WRA
Electric Fuse, Fast Blow, 1.75A, 32VAC, 32VDC, 50A (IR), Surface Mount, 0603,
LITTELFUSE
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