Brochure

© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 03/03/17
Surface Mount Fuses
NANO
2®
> Slo-Blo
®
Fuse > 449 Series
449 Series Fuse
Description
The lead free NANO
2®
Slo-Blo
®
fuse is RoHS compliant,
Halogen Free and 100% lead-free. This product is fully
compatible with lead-free solder alloys and higher
temperature profiles associated with lead-free assembly.
The Slo-Blo
®
fuse design has enhanced inrush withstand
characteristics over the NANO
2®
Fast-Acting Fuse. The
unique time delay feature of this fuse design helps solve the
problem of nuisance “opening” by accommodating inrush
currents that normally cause a fast-acting fuse to open.
Agency Approvals
AGENCY AGENCY FILE NUMBER AMPERE RANGE
E10480 0.375A - 5A
PS
E
NBK030205-E10480B 1A - 5A
Electrical Characteristics for Series
Features
RoHS
Pb
% of Ampere
Rating
Opening Time
100% 4 hours, Minimum
200% 1 sec., Min.; 60 sec., Max.
300% 0.2 sec., Min.; 3 sec., Max
800% 0.02 sec., Min.; 0.1 sec., Max.
Electrical Specifications by Item
Ampere
Rating
(A)
Amp Code
Max
Voltage
Rating
(V)
Interrupting
Rating
Nominal Cold
Resistance
(Ohms)
Nominal
Melting
I
2
t (A
2
sec)
Agency Approvals
PS
E
0.375 .375 125
50A @125 VAC/VDC
PSE: 100A @100 VAC
1.5130 0.088 x
0.500 .500 125 0.7633 0.258
x
0.750 .750 125 0.4080 0.847
x
1. 0 0 0 01. 125 0.2516 1. 76
x
x
1.50 01. 5 125 0.1186 4.70
x
x
2.00 002. 125 0.0708 6.76
x
x
2.50 02.5 125 0.0400 13.18
x
x
3.00 003. 125 0.0352 19.55
x
x
3.50 03.5 125 0.0261 32.70
x
x
4.00 004. 125 0.0227 40.80
x
x
5.00 005. 125 0.0171 59.59 x x
Applications
• Notebook PC
• LCD/PDP TV
• LCD monitor
• LCD/PDP panel
• LCD backlight inverter
• Portable DVD player
• Power supply
• Networking
• PC server
• Cooling fan system
• Storage system
• Telecom system
• Wireless basestation
• White goods
• Game console
• Office Automation
equipment
• Battery charging circuit
protection
• Industrial equipment
Secondary protection for space constrained applications:
• Lead-free, Halogen free
and RoHS compliant
• Small size
• Wide range of current
ratings available
• Wide operating
temperature range
• Low temperature
rerating
PS
E
Notes: - l
2
t calculated at 8ms. Resistance is measured at 10% of rated current, 25ºC
Additional Information
Datasheet
Samples
Resources
Application testing is strongly recommended.