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參數(shù)資料
型號(hào): 0429007.WRMLHF
元件分類: 保險(xiǎn)絲
英文描述: VERY FAST BLOW ELECTRIC FUSE, 7A, 24VAC, 24VDC, 35A (IR), SURFACE MOUNT
封裝: ROHS COMPLIANT
文件頁數(shù): 2/3頁
文件大小: 588K
代理商: 0429007.WRMLHF
Introduction to Circuit Protection
Introduction to Circuit Protection
Transientology
34
2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Surface Mount Fuses
429 Series
Thin Film > 1206 Size > Very Fast-Acting > 429 Series
Please refer to www.littelfuse.com/series/429.html for current information.
Average Time Current Curves
7A
TI
M
E
IN
SE
CO
ND
S
CURRENT IN AM PERES
0.01
0.1
1
10
100
10
100
0.001
reflow condition
Pb – Free assembly
pre Heat
-Temperature min (T
s(min))
150°C
-Temperature max (T
s(max))
200°C
-Time (min to max) (t
s)
60 – 180 secs
Average ramp up rate (liquidusTemp
(T
l) to peak
5°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)
250+0/-5 °C
Time within 5°c of actual peak
Temperature (t
p)
20 – 40 seconds
ramp-down rate
5°C/second max
Time 25°c to peakTemperature (T
p)
8 minutes Max.
Do not exceed
260°C
Soldering Parameters
Temperature Rerating Curve
Wave Soldering
260°C, 10 seconds max.
Note:
1. Derating depicted in this curve is in addition to the standard derating of 25% for
continuous operation.
Example:
For continuous operation at 70 degrees celsius, the fuse should be deratedas follows:
I = (0.75)(0.80)I
RAT = (0.60)IRAT
2. The temperature derating curve represents the nominal conditions. For questions
about temperature derating curve, please consult Littelfuse technical support
for assistance.
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(guān)PDF資料
PDF描述
0429007.WRML VERY FAST BLOW ELECTRIC FUSE, 7A, 24VAC, 24VDC, 35A (IR), SURFACE MOUNT
0429007.RL VERY FAST BLOW ELECTRIC FUSE, 7A, 24VAC, 24VDC, 35A (IR), SURFACE MOUNT
043.101 DATA LINE FILTER
043.102 DATA LINE FILTER
043.103 DATA LINE FILTER
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