参数资料
型号: 0449005.MR
元件分类: 保险丝
英文描述: SLOW BLOW ELECTRIC FUSE, 5A, 125VAC, 125VDC, 50A (IR), SURFACE MOUNT
封装: HALOGEN FREE AND ROHS COMPLIANT
文件页数: 2/4页
文件大小: 165K
代理商: 0449005.MR
Introduction to Circuit Protection
Introduction to Circuit Protection
Transientology
54
2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Surface Mount Fuses
449 Series
NANO2 > Slo-Blo > 449 Series
Please refer to www.littelfuse.com/series/449.html for current information.
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 – 120 secs
Average ramp up rate (LiquidusTemp
(T
L) to peak
3°C/second max.
T
S(max) to TL - Ramp-up Rate
3°C/second max.
Reflow
-Temperature (T
L) (Liquidus)
217°C
-Temperature (t
L)
60 – 90 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
Average Time Current Curves
Temperature Rerating Curve
TIME
IN
SECONDS
CURRENT IN AMPERES
0.01
0.1
1
10
100
1000
0
1
10
100
3A
4A 5A
1.
5A
1A
.750A
.500A
.375A
2.
5A
2A
3.
5A
Note:
1. Derating depicted in this curve is in addition to the standard derating of 25% for
continuous operation.
Wave Soldering Parameters
Temperature,
3 seconds max.
Time
T
emperature
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
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