04371.25WR Datasheet, PDF (1/3 Pages) Littelfuse – Surface Mount Fuses Ceramic Fuse > 437 Series

Surface Mount Fuses
Ceramic Fuse > 437 Series
437 Series – 1206 Fast-Acting Fuse
Description
This 100% Lead-free, RoHS compliant and Halogen-free
fuse series has been designed specifically to provide over
current protection to circuits that see high working ambient
temperatures (up to 150ºC).
The general design ensures excellent temperature stability
and performance reliability.
In addition to this, the high I²t values typical of the
Littelfuse Ceramic Fuse family ensure high inrush current
withstand capability.
Agency Approvals
Agency
Agency File Number
E10480
LR29862
Ampere Range
0.250A ~ 8A
0.250A ~ 8A
Electrical Characteristics for Series
% of Ampere
Rating
100%
250%
350%
350%
Ampere Rating
250mA - 8A
750mA - 8A
250mA -500mA
750mA - 8A
Opening Time at 25ºC
4 hours, Minimum
5 seconds, Maximum
5 seconds, Maximum
1 second, Maximum
Features
• Operating Temperature
from -55ºC to +150ºC
• 100% Lead-free and
RoHS compliant
• Suitable for both leaded
and lead-free reflow /
wave soldering
Applications
• Automotive Electronics
• LCD Displays
• Servers
• Printers
• Scanners
• Data Modems
Electrical Specifications by Item
Ampere
Rating
(A)
Amp
Code
Max.
Voltage
Rating (V)
Interrupting Rating
Nominal Nominal Nominal Voltage Nominal Power ^{Agency Approvals}
Resistance Melting I²t Drop At Rated Dissipation At
(Ohms)² (A²Sec.)³ Current (V)⁴ Rated Current (W)
250mA .250 125
375mA .375 125
50 A @ 125 V AC/DC
2.290
1.330
500mA .500
63
0.908
750mA .750
63
0.665
1A 001.
63
0.360
1.25A 1.25
63
50 A @ 63 V AC/DC
0.318
1.5A 01.5
63
0.209
1.75A 1.75
63
0.0703
2A 002.
63
0.058
2.5A 02.5
32
0.043
3A 003.
32
0.033
3.5A 03.5
32
0.027
4A 004.
32
50 A @ 32 V AC/35 V DC 0.022
5A 005.
32
0.016
7A 007.
32
0.010
8A 008.
32
0.0084
0.003
0.010
0.018
0.064
0.100
0.256
0.324
0.075
0.144
0.225
0.400
0.576
1.024
1.936
4.900
6.400
0.78
0.60
0.52
0.45
0.41
0.40
0.39
0.27
0.17
0.14
0.15
0.16
0.16
0.09
0.11
0.067
0.195
0.225
0.260
0.335
0.415
0.496
0.579
0.474
0.345
0.363
0.462
0.560
0.618
0.484
0.760
0.539
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
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 msecs. 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
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/437.html for current information.
17
Revised: June 23, 2011
437 Series