Littelfuse 443 Series User Manual
Surface mount fuses, 443 series fuse, Nano
© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 12/19/13
Surface Mount Fuses
NANO
2®
> 250V > Time Lag > 443 Series
443 Series Fuse
Features
• 250 VAC voltage rating
• Time-Lag
• Available 0.50A – 5.00A
• RoHS Compliant
• Fully compatible with
lead-free solder alloys
and higher temperature
profiles associated with
lead-free assembly
% of Ampere
Rating
Opening Time
100%
4 hours, Minimum
250%
120 seconds, Maximum
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)
Nominal
Voltage Drop
(mV)
Agency
Approvals
0.50
.500
250
50A @250VAC
0.600
1.61
448
x
0.75
.750
250
0.275
1.00
285
x
1
001.
250
0.180
10.17
234
x
1.50
01.5
250
0.100
14.72
196
x
2
002.
250
0.052
18.06
154
x
2.50
02.5
250
0.035
18.13
139
x
3
003.
250
0.028
51.44
113
x
3.50
03.5
250
0.019
53.14
98
x
4
004.
250
0.016
70.56
81
x
5
005.
250
0.0115
127.79
80
x
Notes:
1. Cold resistance measured at less than 10% of rated current at 23°C.
2. Agency Approval Table Key: X=Approved or Certified, P=Pending and Blank=Not Approved
3. Have special electrical characteristic needs? Contact Littelfuse to learn more about application specific options.
The 250V Nano
2
Fuse is a small square surface mount
fuse that is designed to enable compliance with the RoHS
directive. This product is fully compatible with lead-free
solder alloy and higher temperature profiles associated
with lead-free assembly.
• AC/DC power adaptor
• Telecom equipment
system power
• Portable system built-in
AC/DC converter
• High voltage DC/DC
converter
• Lighting System
• LED Lighting
Description
Applications
Agency Approvals
Electrical Characteristics for Series
AgeNCy
AgeNCy FIle NumbeR
AmpeRe RANge
e10480
0.500A - 5.00A
Additional Information