04401.25WR Littelfuse Inc, 04401.25WR Datasheet - Page 2

• Manufacturer Part Number: 04401.25WR
• Description: FUSE 63V HIGH I2T 1206 1.25A
• Manufacturer: Littelfuse Inc
• Series: 440r

Specifications of 04401.25WR

• Fuse Type: Slow Blow, Time Lag
• Voltage - Rated: 50VAC, 50VDC
• Current: 1.25A
• Package / Case: 1206 (3216 Metric)
• Size / Dimension: 0.126" L x 0.063" W x 0.032" H (3.20mm x 1.60mm x 0.82mm)
• Mounting Type: Surface Mount
• Operating Temperature: -55°C ~ 150°C
• Dc Cold Resistance: 0.227 Ohm
• Melting I²t: 0.402
• Color: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 4401.25WR

Note:
1. Derating depicted in this curve is in addition to the standard derating of 20% for
440 Series
Temperature Derating Curve
Soldering Parameters
Reflow Condition
Pre Heat
Average Ramp-Up Rate (Liquidus Temp
(T
T
Reflow
Peak Temperature (T
Time within 5°C of actual peak
Temperature (t
Ramp-down Rate
Time 25°C to peak Temperature (T
Do not exceed
Wave Soldering
continuous operation.
For continuous operation at 75 degrees celsius, the fuse should be derated as follows:
I = (0.80)(0.85)I
S(max)
L
140
120
100
) to peak)
80
60
40
-65
to T
L
-45
RAT
- Ramp-up Rate
- Temperature Min (T
- Temperature Max (T
- Time (Min to Max) (t
- Temperature (T
- Temperature (t
= (0.68)I
-25
p
)
RAT
-5
P
)
TEMPERATURE (°C)
15
L
L
)
) (Liquidus)
Introduction to Circuit Protection
260°C, 10 seconds max.
Introduction to Circuit Protection
35
s(min)
s(max)
s
)
P
55
)
)
)
75
150°C
200°C
60 – 180 seconds
3°C/second max.
5°C/second max.
217°C
60 – 150 seconds
260
10 – 30 seconds
6°C/second max.
8 minutes max.
260°C
95
+0/-5
115
Surface Mount Fuses
°C
Ceramic Fuse > 440 Series
135
155
2
Transientology
Average Time Current Curves
0.001
T
T
0.01
100
S(max)
0.1
10
S(min)
1
25
0.1
T
T
P
L
time to peak temperature
Please refer to www.littelfuse.com/series/440.html for current information.
(t 25ºC to peak)
1.0
t
Preheat
S
CURRENT IN AMPERES
Specifications are subject to change without notice.
Ramp-up
10.0
t
100.0
t
P
L
Time
© 2009 Littelfuse, Inc.
Critical Zone
Ramp-down
T
L
to T
1000.
P