參數(shù)資料
型號： 0438002.WR
元件分類： 保險絲
英文描述： FAST BLOW ELECTRIC FUSE, 2A, 12VAC, 32VDC, 50A (IR), SURFACE MOUNT
封裝： HALOGEN FREE AND ROHS COMPLIANT
文件頁數(shù)： 2/3頁
文件大?。?/td> 532K
代理商： 0438002.WR
Introduction to Circuit Protection
Introduction to Circuit Protection
Transientology
22
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.
Average Time Current Curves
0.001
0.01
0.1
1
10
100
.2
50
A
4A
3.
5A
3A
2.
5A
2A
1.
75
A
1.
5A
1.
25
A
1A
.5
0
0A
.3
75
A
6A
5A
.7
50
A
T
IM
E
IN
S
E
C
O
N
D
S
0.1
1
10
100
CURRENT IN AMPERES
reflow condition
Pb–freeassembly
pre Heat
-Temperature min (T
s(min))
150°C
-Temperature max (T
s(max))
200°C
-Time (min to max) (t
s)
60 – 180 seconds
Average ramp-up rate (liquidusTemp
(T
l) to peak)
3°C/second max.
T
S(max) to Tl - ramp-up rate
5°C/second max.
reflow
-Temperature (T
l) (liquidus)
217°C
-Temperature (t
l)
60 – 150 seconds
peakTemperature (T
p)
260+0/-5 °C
Time within 5°c of actual peak
Temperature (t
p)
10 – 30 seconds
ramp-down rate
6°C/second max.
Time 25°c to peakTemperature (T
p)
8 minutes max.
Do not exceed
260°C
Soldering Parameters
Temperature Rerating Curve
40
60
80
100
120
140
-65
-45
-25
-5
15
35
55
75
95
115
135 155
TEMPERATURE (°C)
P
E
R
C
E
N
T
O
F
R
A
T
IN
G
Example:
For continuous operation at 75 degrees celsius, the fuse should be rerated as follows:
I = (0.80)(0.85)I
RAT = (0.68)IRAT
Note:
1. Rerating depicted in this curve is in addition to the standard rerating of 20% for
continuous operation.
Wave Soldering
260°C, 10 seconds max.
Time
Te
mperatur
e
TP
TL
TS(max)
TS(min)
25
tP
tL
tS
time to peak temperature
(t 25C to peak)
Ramp-down
Ramp-up
Preheat
Critical Zone
TL to TP
相關PDF資料
PDF描述
0438003.WR FAST BLOW ELECTRIC FUSE, 3A, 12VAC, 32VDC, 50A (IR), SURFACE MOUNT
0438004.WR FAST BLOW ELECTRIC FUSE, 4A, 12VAC, 32VDC, 50A (IR), SURFACE MOUNT
0438005.WR FAST BLOW ELECTRIC FUSE, 5A, 12VAC, 32VDC, 50A (IR), SURFACE MOUNT
043801.5WR FAST BLOW ELECTRIC FUSE, 1.5A, 32VDC, 50A (IR), SURFACE MOUNT
043802.5WR FAST BLOW ELECTRIC FUSE, 2.5A, 12VAC, 32VDC, 50A (IR), SURFACE MOUNT
相關代理商/技術參數(shù)
參數(shù)描述
0438003.WR 功能描述:保險絲 32V FA 0603 3A RoHS:否 制造商:Littelfuse 產(chǎn)品:Surface Mount Fuses 電流額定值:0.5 A 電壓額定值:600 V 保險絲類型:Fast Acting 保險絲大小/組:Nano 尺寸:12.1 mm L x 4.5 mm W 安裝風格: 端接類型:SMD/SMT 系列:485
0438004.WR 功能描述:保險絲 32V FA 0603 4A RoHS:否 制造商:Littelfuse 產(chǎn)品:Surface Mount Fuses 電流額定值:0.5 A 電壓額定值:600 V 保險絲類型:Fast Acting 保險絲大小/組:Nano 尺寸:12.1 mm L x 4.5 mm W 安裝風格: 端接類型:SMD/SMT 系列:485
0438005.WR 功能描述:保險絲 32V FA 0603 5A RoHS:否 制造商:Littelfuse 產(chǎn)品:Surface Mount Fuses 電流額定值:0.5 A 電壓額定值:600 V 保險絲類型:Fast Acting 保險絲大小/組:Nano 尺寸:12.1 mm L x 4.5 mm W 安裝風格: 端接類型:SMD/SMT 系列:485
0438-0050-01 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Logic IC
0438-0050-02 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Logic IC
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