Datasheet

Surface Mount Fuses
NANO2® > Slo-Blo® Fuse > 449 Series
449 Series Fuse
RoHS
PS
E
Pb
Description
The lead free NANO2® 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 NANO2® 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.
Features
Agency Approvals
AGENCY
AGENCY FILE NUMBER
AMPERE RANGE
E10480
0.375A - 5A
NBK030205-E10480B
1A - 5A
PS
E
% 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.
Additional Information
Resources
• Wide operating
temperature range
• Low temperature
rerating
Applications
Electrical Characteristics for Series
Datasheet
• Lead-free and Halogen
Free
• Small size
• Wide range of current
ratings available
Secondary protection for space constrained applications:
• Storage system
• Notebook PC
• Telecom system
• LCD/PDP TV
• Wireless basestation
• LCD monitor
• White goods
• LCD/PDP panel
• Game console
• LCD backlight inverter
• Office Automation
• Portable DVD player
equipment
• Power supply
•
Battery charging circuit
•Networking
protection
• PC server
• Industrial equipment
• Cooling fan system
Samples
Electrical Specifications by Item
Ampere
Rating
(A)
Amp Code
Max
Voltage
Rating
(V)
Interrupting
Rating
Nominal Cold
Resistance
(Ohms)
Nominal
Melting
I2t (A2sec)
Agency Approvals
PS
E
0.375
.375
125
1.5130
0.088
x
0.500
.500
125
0.7633
0.258
x
0.750
.750
125
0.4080
0.847
x
1.00
001.
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
50A @125 VAC/VDC
PSE: 100A @100 VAC
Notes: - l2t calculated at 8ms. Resistance is measured at 10% of rated current, 25ºC
© 2015 Littelfuse, Inc.
Specifications are subject to change without notice. Application testing is strongly recommended.
Revised: 06/21/15
Surface Mount Fuses
NANO2® > Slo-Blo® Fuse > 449 Series
.750A
1A
1.5A
2A
2.5A
3A
3.5A
4A
5A
Average Time Current Curves
.375A
.500A
Temperature Re-rating Curve
1000
TIME IN SECONDS
100
10
1
Note:
1. Rerating depicted in this curve is in addition to the standard derating of 25% for
continuous operation.
0.1
0.01
0
1
10
100
CURRENT IN AMPERES
Soldering Parameters
Pre Heat
Pb – Free assembly
- Temperature Min (Ts(min))
150°C
- Temperature Max (Ts(max))
200°C
- Time (Min to Max) (ts)
60 – 120 secs
Average ramp up rate (Liquidus Temp
(TL) to peak
3°C/second max.
TS(max) to TL - Ramp-up Rate
3°C/second max.
Reflow
- Temperature (TL) (Liquidus)
217°C
- Temperature (tL)
60 – 90 seconds
Peak Temperature (TP)
260+0/–5 °C
Time within 5°C of actual peak
Temperature (tp)
20 – 40 seconds
Ramp-down Rate
5°C/second max.
Time 25°C to peak Temperature (TP)
8 minutes max.
Do not exceed
260°C
Wave Soldering Parameters
260°C Peak
Temperature,
3 seconds max.
tP
TP
Temperature
Reflow Condition
Critical Zone
TL to TP
Ramp-up
TL
TS(max)
tL
Ramp-down
TS(min)
Preheat
tS
25
time to peak temperature
(t 25ºC to peak)
Time
© 2015 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 06/21/15
Surface Mount Fuses
NANO2® > Slo-Blo® Fuse > 449 Series
Product Characteristics
Materials
Body: Ceramic
Terminations: Gold-plated Caps
Product Marking
Brand, Amperage Rating
Operating
Temperature
Moisture
Sensitivity Level
MIL-STD-202, Method 107, Test
Condition B, 5 cycles, -65°C to
125°C, 15 minutes @ each extreme
MIL-STD-202, Method 213, Test I:
Deenergized. 100G’s pk amplitude,
sawtooth wave 6ms duration, 3
cycles XYZ+xyz = 18 shocks
MIL-STD-202, Method 201: 0.03"
amplitude, 10-55 Hz in 1 min. 2hrs
each XYZ=6hrs
Thermal Shock
Mechanical Shock
-55°C to 125°C
Level 1, J-STD-020
Vibration
Solderability
MIL-STD-202, Method 208
Insulation
Resistance (after
Opening)
MIL-STD-202, Method 302, Test Condition
A (10,000 ohms minimum)
MIL-STD-202, Method 106, 10 cycles
Moisture Resistance
Salt Spray
Resistance to Soldering
Heat
Dimensions
Part Numbering System
3.15
(.124")
1.96
(.077")
Recommended pad layout
0449 001. M R
6.10 ± .20
(.240")
6.86
(.270")
2.95
(.116")
MIL-STD-202, Method 101, Test
Condition B (48hrs)
MIL-STD-202, Method 210, Test
condition B (10 sec at 260°C)
F
SERIES
1A
T
AMP Code*
Refer to Electrical characteristics table
1.45
(.057")
2.69 ± .25
(.106")
QUANTITY Code
M = 1000 pcs
PACKAGING Code
R = Tape and Reel
2.69 ± .25
(.106")
*Example:
0.375 Amp product is 0449.375MR
(1 amp product shown above).
Packaging
Packaging Option
Packaging Specification
Quantity
Quantity &
Packaging Code
12mm Tape and Reel
EIA RS-481-2 (IEC 286, part 3)
1000
MR
© 2015 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 06/21/15