Fuse Datasheet
443 Series
Slo-Blo® Fuse
PS
E
RoHS
Description
The 250V Nano2® 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.
Features
■ 250 VAC voltage rating
■ Recognized to UL/CSA/NMX
248-1 and UL/CSA/NMX
248-14
■ Slo-Blo® Fuse
■ Available 0.50A – 5.00A
■ Conforms to K60127-1 and
K60127-7
■ Halogen-free and RoHS
Compliant
■ Conforms to DENAN’s
Appendix 3
■ Fully compatible with
lead-free solder alloys and
higher temperature profiles
associated with lead-free
assembly
■ Conforms to IEC/EN 60127-1
and IEC/EN 60127-7
Additional Information
Applications
■ AC/DC power adaptor
■ Lighting System
■ LED Lighting
■ Telecom equipment system
power
Resources
Accessories
Samples
■ Portable system built-in AC/
DC converter
Electrical Characteristics for Series
Agency Approvals
Agency
Agency File/Certificate Numbers
Ampere Range
% of Ampere Rating
OpeningTime
E10480
0.500A - 5.00A
100%
250%
4 hours, Minimum
SU05024 -14004
SU05024 -14003
SU05024 -14002
0.500A - 0.750A
1.00A - 2.50A
3.00A - 5.00A
120 seconds, Maximum
PS
E
NBK290416-JP1021
1.00A – 5.00A
0.500A - 5.00A
0.500A - 5.00A
0.500A - 5.00A
R50310551
N/A
N/A
Electrical Specifications by Item
Ampere
Rating
(A)
Max
Voltage
Rating (V)
Nominal Cold
Resistance
(Ohms)
Nominal
Melting
Nominal
Voltage Drop
(mV)
Agency Approvals
Amp
Code
Interrupting
Rating4
PS
E
I2t (A2sec)
0.50
0.75
1
1.50
2
2.50
3
3.50
4
.500
.750
001.
01.5
002.
02.5
003.
03.5
004.
005.
250
250
250
250
250
250
250
250
250
250
0.600
0.275
0.180
0.100
0.052
0.035
0.028
0.019
0.016
0.0115
1.61
448
285
234
196
154
139
113
98
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
-
-
x
x
x
x
x
x
x
x
x
x
3.025
10.17
14.72
18.06
18.13
51.44
53.14
122.5
180.6
x
x
x
x
x
x
x
x
50A@250VAC
100A@125VDC
500A@60VDC
81
80
5
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.
4. Interrupting Rating may differ based on Agency Approval. See Agency Approval certificate for more details.
© 2023 Littelfuse, Inc.
Specifications are subject to change without notice.
1
Revised: GD.07/03/23