448 Series Datasheet by Littelfuse Inc.

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© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 12/14/17
Surface Mount Fuses
NANO Fuse > Very Fast-Acting > 448 Series
448 Series Fuse
Description
The lead-free Nano SMF Fuse is a very small, square
surface mount fuse that 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.
Agency Approvals
Features
RoHS
Pb
PS
E
Electrical Characteristics for Series
% of Ampere
Rating Ampere Rating Opening Time
100% 1/16 –15 4 hours, Minimum
200%
1/16 –10 5 sec., Maximum
1215 20 sec., Maximum
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
RoHS compliant, Lead-
free and Halogen Free
Very fast-acting
Small size
Wide range of current
rating available (0.062A
to 15A)
Wide operating
temperature range
Low temperature
de-rating
AGENCY AGENCY FILE NUMBER AMPERE RANGE
E10480 0.062A - 15A
29862 0.062A - 15A
PS
E
NBK030205-E10480A
NBK030205-E10480B
1A - 1.6A
2A - 5A
Application testing is strongly recommended.
Additional Information
Datasheet Samples
Resources
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© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 12/14/17
Surface Mount Fuses
NANO Fuse > Very Fast-Acting > 448 Series
Ampere
Rating
(A)
Amp Code
Max
Voltage
Rating
(V)
Interrupting
Rating
Nominal Cold
Resistance
(Ohms)
Nominal
Melting
I2t (A2sec)
Agency Approvals
PS
E
0.062 .062 125
50A @125VAC/VDC
300A @32 VDC
PSE: 100A @100VAC
5.50 0.00023 x x
0.080 .080 125 4.42 0.00043 x x
0.100 .100 125 2.90 0.00082 x x
0.125 .125 125 2.58 0.00130 x x
0.160 .160 125 1. 76 0.00280 x x
0.200 .200 125 1.65 0.00380 x x
0.250 .250 125 0.95 0.01520 x x
0.315 .315 125 0.7015 0.02650 x x
0.375 .375 125 0.6155 0.02400 x x
0.400 .400 125 0.4895 0.04160 x x
0.500 .500 125 0.3800 0.10000 x x
0.630 .630 125 0.3125 0.121 x x
0.750 .750 125 0.2290 0.206 x x
0.800 .800 125 0.1907 0.272 x x
1. 0 0 0 01. 125 0.08630 0.441 x x x
1.25 1.25 125 0.06619 0.900 x x x
1.50 01. 5 125 0.06514 0.900 x x x
1.60 01. 6 125 0.06261 1.122 x x x
2.00 002. 125 0.03529 0.812 x x x
2.50 02.5 125 0.02934 1.156 x x x
3.00 003. 125 0.02445 1.720 x x x
3.15 3.15 125 0.02300 1.810 x x x
3.50 03.5 125 0.02100 2.300 x x x
4.00 004. 125 0.01577 3.970 x x x
5.00 005. 125 0.01531 4.490 x x x
6.30 06.3 125 0.01044 12.10 x x x
7. 0 0 0 0 7. 125 0.00900 13.92 x x x
8.00 008. 125 0.00780 18.33 x x x
10.00 010. 125
35A @125 VAC
50A @125 VDC
300A @32 VDC
PSE: 100A @100VAC
0.00700 28.00 x x x
12.00 012. 85
50A @65 VAC/VDC
300A @24 VDC
200A @85 VDC
0.00533 47.59 x x
15.00 015. 85 0.00394 78.4 x x
Electrical Specifications by Item
Notes:
- l2t calculated at 8ms.
- Resistance is measured at 10% of rated current, 25ºC
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© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 12/14/17
Surface Mount Fuses
NANO Fuse > Very Fast-Acting > 448 Series
Average Time Current Curves
Reflow Condition Pb – Free assembly
Pre Heat
- 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 5°C/second max.
TS(max) to TL - Ramp-up Rate 5°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, 10
seconds max.
Soldering Parameters
Temperature Re-rating Curve
448 SERIES NANO LEAD FREE VERY FAST ACTING FUSE
0.001
0.01
0.1
1
10
100
00010010111.0
CURRENT IN AMPS
TIME IN SECONDS
.062 A
.080 A
.100 A
.125 A
.160 A
.200 A
.250 A
.315 A
.375 A
.40 A
.50 A
.63 A
.75 A
.80 A
1.00 A
1.25 A
1.50 A
1.60 A
2.00 A
2.50 A
3.00 A
3.15 A
3.50 A
4.00 A
5.00 A
6.30 A
7 A
8 A
10 A
12 A
15 A
Note:
1. Rerating depicted in this curve is in addition to the standard derating of 25% for
continuous operation.
Time
Temperature
TP
TL
TS(max)
TS(min)
25
tP
tL
tS
time to peak temperature
(t 25ºC to peak)
Ramp-down
Ramp-up
Preheat
Critical Zone
TL to TP
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© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 12/14/17
Surface Mount Fuses
NANO Fuse > Very Fast-Acting > 448 Series
Materials Body: Ceramic
Terminations: Gold-plated Caps
Product Marking Brand, Amperage Rating
Operating
Temperature -55oC to 125oC
Moisture Sensitivity
Level Level 1, J-STD-020
Solderability MIL-STD-202, Method 208
Insulation
Resistance (after
Opening)
MIL-STD-202, Method 302, Test Condition
A (10,000 ohms minimum)
Thermal Shock
MIL-STD-202, Method 107, Test
Condition B, 5 cycles, -65oC to
125oC, 15 minutes @ each extreme
Mechanical Shock
MIL-STD-202, Method 213, Test I:
Deenergized. 100G’s pk amplitude,
sawtooth wave 6ms duration, 3
cycles XYZ+xyz = 18 shocks
Vibration
MIL-STD-202, Method 201: 0.03”
amplitude, 10-55 Hz in 1 min. 2hrs
each XYZ=6hrs
Moisture Resistance MIL-STD-202, Method 106, 10 cycles
Salt Spray MIL-STD-202, Method 101, Test
Condition B (48hrs)
Resistance to Soldering
Heat
MIL-STD-202, Method 210, Test
condition B (10 sec at 260oC)
Product Characteristics
F
7 A
6.86
(.270")
3.15
(.124")
2.95
(.116")
1.96
(.077")
2.69 ± .25
(.106")
2.69 ± .25
(.106")
1.45
(.057")
6.10 ± .20
(.240")
Recommended pad layout
Dimensions
Packaging
Part Numbering System
Packaging Option Packaging Specification Quantity Quantity &
Packaging Code
12mm Tape and Reel EIA RS-481-1 (IEC 286, part 3) 1000 MR
0448 001. M R
SERIES
AMP Code*
QUANTITY Code
PACKAGING Code
Refer to Electrical
Characteristics table
M = 1000 pcs
R = Tape and Reel
*Example:
1.5 amp product is 044801. 5 MR
(1 amp product shown above).
Disclaimer Notice - Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military,
aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other
application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those
expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any
purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products
used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is
subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. Information furnished is believed to be accurate and reliable.
However, users should independently evaluate the suitability of and test each product selected for their own applications. Littelfuse products are not
designed for, and may not be used in, all applications. Read complete Disclaimer Notice at www.littelfuse.com/disclaimer-electronics.

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