Surface Mount Fuses
Ceramic Fuse > 469 Series
469 Series – 1206 Slo-Blo
®
Fuse
Description
The 469 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 are typical in the Littelfuse
Ceramic fuse family, ensure high inrush current withstand
capability.
Agency Approvals
AGENCY
AGENCY FILE NUMBER
E10480
LR29862 (Pending)
AMPERE RANGE
1A – 8A
1A – 8A
Features
from -55ºC to +150ºC
compliant and Halogen-
free
Applications
and lead-free reflow /
wave soldering
Electrical Characteristics for Series
% of Ampere
Rating
100%
200%
300%
800%
Ampere
Rating
1A – 8A
1A – 8A
1A – 8A
1A – 8A
Opening Time at 25ºC
4 hours, Minimum
1 sec., Min.; 120 secs., Max.
0.1 sec., Min.; 3 secs., Max.
0.002 sec., Min.; 0.05 sec., Max.
Electrical Specifications by Item
Ampere
Amp
Rating
Code
(A)
1
1.25
1.5
2
2.5
3
3.5
4
5
6
7
8
001.
1.25
01.5
002.
02.5
003.
03.5
004.
005.
006.
007
.
008.
Max.
Voltage
Rating (V)
63
63
63
63
32
32
32
32
32
24
24
24
Nominal Nominal Voltage Nominal Power Agency Approvals
Nominal
Drop At Rated
Dissipation At
Interrupting Rating Resistance Melting I
2
t
(A
2
Sec.)
3
Current (V)
4
Rated Current (W)
(Ohms)
2
50 A @ 63 V DC
pending
pending
pending
pending
pending
pending
pending
pending
pending
pending
pending
pending
pending
pending
pending
pending
pending
pending
pending
pending
pending
pending
pending
pending
50 A @ 32 V DC
60 A @ 32 V DC
60 A @ 24 V DC
0.052
0.035
0.028
0.021
0.017
3.560
5.620
9.410
14.400
23.720
0.236
0.216
0.274
0.216
0.233
0.944
1.080
1.640
1.510
1.860
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.
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.
Devices designed to be mounted with marking code facing up.
© 2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/469.html for current information.
Revised: September 1, 2009
469 Series
469 Series
Surface Mount Fuses
Introduction to Circuit Protection
Transientology
Ceramic Fuse > 469 Series
Temperature Rerating Curve
Average Time Current Curves
100
4A
5A
6A
7A
8A
140
PERCENT OF RATING
120
10
100
TIME IN SECONDS
80
1
60
40
-65
-45
-25
-5
15
35
55
75
95
115
135
155
TEMPERATURE (°C)
0.1
1. Rerating depicted in this curve is in addition to the standard rerating of 20% for
continuous operation.
0.01
I = (0.80)(0.85)I
RAT
= (0.68)I
RAT
0.001
1
10
100
1000
CURRENT IN AMPERES
Soldering Parameters
Reflow Condition
- Temperature Min (T
s(min)
)
Pre Heat
- Temperature Max (T
s(max)
)
- Time (Min to Max) (t
s
)
Average Ramp-up Rate (Liquidus Temp
(T
L
) to peak)
T
S(max)
to T
L
- Ramp-up Rate
Reflow
- Temperature (T
L
) (Liquidus)
- Temperature (t
L
)
150°C
60 – 180 seconds
3°C/second max.
5°C/second max.
217°C
60 – 150 seconds
260
+0/-5
T
P
Ramp-up
t
P
Critical Zone
T
L
to T
P
Temperature
200°C
T
L
T
S(max)
Preheat
t
L
Ramp-down
T
S(min)
t
S
25
time to peak temperature
(t 25ºC to peak)
Time
Peak Temperature (T
P
)
Time within 5°C of actual peak
Temperature (t
p
)
Ramp-down Rate
Time 25°C to peak Temperature (T
P
)
Do not exceed
°C
10 – 30 seconds
6°C/second max.
8 minutes max.
260°C
Wave Soldering
260°C, 10 seconds max.
469 Series
© 2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/469.html for current information.
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