440 Datasheet, PDF (1/4 Pages) Littelfuse – Surface Mount Fuses

Surface Mount Fuses
Ceramic Fuse > 440 Series
440 Series, 1206 High I²t Fuse
Agency Approvals
AGENCY
AGENCY FILE NUMBER
E10480
Pending
AMPERE RANGE
1.75A - 8A
1.75A - 8A
Electrical Characteristics for Series
% of Ampere
Rating
100%
350%
Ampere Rating
1.75A - 8A
1.75A - 8A
Opening Time at 25ºC
4 hours, Minimum
5 secs., Maximum
Description
The 440 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 temperatures up to 150ºC and high inrush
currents.
The general design ensures excellent temperature stability
and performance reliability.
This high I²t fuse series is designed to have ultra high
inrush current withstand capability to avoid nuisance fuse
open.
Features
t
0QFSBUJOH
5FNQFSBUVSF

from -55ºC to +150ºC
t

-FBEGSFF
3P)4

compliant and Halogen-
free
t
4VJUBCMF
GPS
CPUI
MFBEFE

and lead-free reflow /
wave soldering
t
6MUSB
IJHI
*²t values
Applications
t
"VUPNPUJWF
&MFDUSPOJDT
t
-$%
%JTQMBZT
t
4FSWFST
t
/PUFCPPL
$PNQVUFST
t
1SJOUFST
t
4DBOOFST
t
%BUB
.PEFNT
t
)BSE
%JTL
%SJWFT
Electrical Specifications by Item
Ampere
Rating
(A)
Amp
Code
Max.
Voltage
Rating (V)
Interrupting Rating
(AC/DC)¹
Nominal
Resistance
(Ohms)²
Nominal Nominal Voltage Nominal Power ^{Agency Approvals}
Melting I²t Drop At Rated Dissipation At
(A²Sec.)³
Current (V)⁴ Rated Current (W)
1.75 1.75
32
0.04121
0.3312
0.07769
0.136
x
x
2
002.
32
0.03582
0.4326
0.07921
0.158
x
x
2.5 02.5
32
0.026706 0.8191
0.0747
0.187
x
x
3
003.
32
0.022
1.232
0.7418
0.223
x
x
3.5 03.5
32
50 A @ 32 V AC/DC 0.01877
1.789
0.07566
0.265
x
x
4
004.
32
0.01515
2.601
0.07088
0.284
x
x
5
005.
32
0.01119
4.761
0.06544
0.327
x
x
7
007.
32
0.00794
8.464
0.06963
0.487
x
x
8
008.
32
0.00646
12.95
0.065526
0.524
x
x
Notes:
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.
2. Nominal Resistance measured with < 10% rated current.
3. Nominal Melting I²t measured at 1 msec. opening time.
4. Nominal Voltage Drop measured at rated current after temperature has stabilized.
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
Derating Curve”for additional derating 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/440.html for current information.
Revised: September 17, 2009
440 Series