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Surface Mount Fuses  
NANO2® > 458 Series 1206 Size Inrush Withstand Fuse  
RoHS  
458 Series Fuse  
Description  
The 458 Series Nano2® Fuse is an ultra-small, square  
surface mount fuse designed to support a variety of space  
constrained overcurrent protection applications. Offering a  
1206 size footprint, it is the smallest wire-in-air type surface  
mount fuse offered by Littelfuse.  
Features  
• Surface Mount Fuse  
• Available in ratings of  
1 to 10 Amperes  
• Recognized to UL/CSA/  
NMX 248-1 and UL/CSA/  
NMX 248-14  
• Fully compatible with  
lead free soldering  
profiles  
• RoHS Compliant and  
Halogen-Free  
Agency Approvals  
Applications  
• Notebook PC  
• LCD backlight inverter  
• LCD Panel  
• DC/DC converter  
• Battery Pack  
• Car Navigation System  
• Network Equipment  
• Telecom Equipment  
• Electronic Signage  
• Portable Consumer  
Electronics  
Agency  
Agency File Number  
E10480  
Ampere Range  
1A–10A  
Additional Information  
Electrical Characteristics for Series  
% of Ampere Rating  
OpeningTime  
4 hours, Minimum  
5 seconds, Maximum  
100%  
250%  
Datasheet  
Resources  
Samples  
Electrical Specifications by Item  
Agency Approvals  
Max  
Voltage  
Rating (V)  
Ampere Rating  
Amp Code  
(A)  
Interrupting  
Rating  
Nominal Cold  
Resistance (Ohms)  
Nominal Melting  
I2t (A2sec)  
Marking  
1.0  
1.25  
1.5  
1.6  
2
2.5  
3
3.15  
3.5  
4
5
6.3  
7
8
10.0  
001.  
1.25  
01.5  
01.6  
002.  
02.5  
003.  
3.15  
03.5  
004.  
005.  
06.3  
0 0 7.  
008.  
010.  
1
1.25  
1.5  
1.6  
2
2.5  
3
3.15  
3.5  
4
5
6.3  
7
8
10  
0.180  
0.125  
0.099  
0.092  
0.0695  
0.06  
0.049  
0.045  
0.0375  
0.032  
0.027  
0.0192  
0.0175  
0.0058  
0.00465  
.168  
.313  
.548  
.562  
.952  
1.408  
2.289  
2.457  
4.00  
4.832  
7.938  
14.37  
20.48  
13.448  
15.0  
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
50A @ 75VDC  
50A @ 48VAC  
75V  
63V  
50A @ 75VDC  
50A @ 32VAC  
50A @ 63VDC  
50A @ 32VAC  
Notes:  
1. l2t values stated for 8 msec opening time  
2. Cold resistance measured at less than 10% of rated current at 25°C.  
3. Agency Approval Table Key: X=Approved or Certified, P=Pending and Blank=Not Approved  
4. Have special electrical characteristic needs? Contact Littelfuse to learn more about application specific options.  
© 2020 Littelfuse, Inc.  
Specifications are subject to change without notice.  
Revised: 03/03/20  
Surface Mount Fuses  
NANO2® > 458 Series 1206 Size Inrush Withstand Fuse  
Temperature Re-rating Curve  
AverageTime Current Curves  
140  
120  
100  
100  
80  
60  
10  
40  
20  
-60$C  
-76$F  
-40$C  
-40$F  
-20$C  
-4!F  
0$C  
-32$F  
20$C  
68$F  
40$C  
104$F  
60$C  
140$F  
80$C  
176$F  
100$C  
212$F  
'120$C  
248$F  
1
Ambient Temperature  
Note:  
1. Rerating depicted in this curve is in addition to the standard rerating of 25% for continuous operation.  
0.1  
0.01  
0.001  
0.1  
1
10  
100  
1000  
CURRENT IN AMPS  
Soldering Parameters  
Reflow Condition  
-Temperature Min (Ts(min)  
-Temperature Max (Ts(max)  
-Time (Min to Max) (ts)  
Average ramp up rate (LiquidusTemp (TL) to peak  
S(max) toTL - Ramp-up Rate  
Pb – Free assembly  
150°C  
tP  
)
TP  
TL  
TS(max)  
TS(min)  
25  
Critical Zone  
L to TP  
Ramp-up  
T
Pre Heat  
)
200°C  
60 – 180 secs  
5°C/second max  
5°C/second max  
217°C  
tL  
T
Ramp-down  
Preheat  
-Temperature (TL) (Liquidus)  
-Temperature (tL)  
Reflow  
60 – 150 seconds  
260+0/-5 °C  
tS  
PeakTemperature (TP)  
Time within 5°C of actual peakTemperature (tp)  
Ramp-down Rate  
20 – 40 seconds  
5°C/second max  
8 minutes Max.  
260°C  
time to peak temperature  
(t 25ºC to peak)  
Time  
Time 25°C to peakTemperature (TP)  
Do not exceed  
© 2020 Littelfuse, Inc.  
Specifications are subject to change without notice.  
Revised: 03/03/20  
Surface Mount Fuses  
NANO2® > 458 Series 1206 Size Inrush Withstand Fuse  
Product Characteristics  
Operating Temperature –55OC to 125OC with proper derating  
Body: Ceramic  
Cap: Gold Plated Brass  
Materials  
MIL-STD-202, Method 107,  
Thermal Shock  
Vibration  
Test Condition B (5 cycles -65oC to +125oC)  
Body: Current Rating  
(Refer to Electrical Characteristic table)  
Product Marking  
MIL-STD-202, Method 201(10-55 Hz)  
MIL-STD-202, Method 106, High Humidity (90-  
98%RH), Heat (65oC)  
MIL-STD-202, Method 101, Test Condition B  
Moisture Resistance  
Salt Spray  
Insulation Resistance  
(after Opening)  
Solderability  
Resistance to  
MIL-STD-202, Method 302,  
Test Condition A (10,000 ohms, Minimum)  
MIL-STD-202, Method 208  
MIL-STD-202, Method 213, Test Condition I (100  
G’s peak for 6 milliseconds)  
Shock  
MIL-STD-202, Method 210,  
Test Condition B (10 sec at 260oC)  
Soldering Heat  
Moisture Sensitivity  
Level  
Level 1 J-STD-020  
Dimensions  
Part Numbering System  
3.175  
(.125”)  
1.575  
0458 001. D R  
(.062”)  
Series  
1.575  
(.062”)  
AMP Code  
Refer to Electrical charac-  
teristics table  
0.813  
(.032”)  
Quantity Code  
3.65  
(.143”)  
D: 1500 pcs  
Packaging Code  
R: Tape and Reel  
2.05  
(.081”)  
Example:  
1.5 amp product is 0458 D  
R (1 amp product shown  
above).  
1.185  
1.28  
(.047”)  
(.050”)  
Recommended Pad Layout  
Packaging  
Quantity &  
Packaging Code  
Packaging Option  
8mmTape and Reel  
Packaging Specification  
Quantity  
EIA-RS 481-1  
1500  
DR  
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.  
© 2020 Littelfuse, Inc.  
Specifications are subject to change without notice.  
Revised: 03/03/20