Axial Lead & Cartridge Fuses
MICRO™ > Very Fast-Acting Fuse > 272/273/274/278/279 Series
272/273/274/278/279 Series, MICRO™ Very Fast-Acting Fuse
QPL
Description
Developed originally for the U.S. Space Program, MICRO™
fuse provides reliability in a compact design. The MICRO™
fuse is available in plug–in or radial lead styles and a
complete range of ampere ratings from 0.002A to 5A to
suit a wide variety of design needs.
Features
• Military grade available
• High breaking capacity
• Plug-in with short or long
leads option
• Recognized to UL/CSA/
NMX 248-1 and UL/CSA/
NMX 248-14
• Clear cover option to view
fuse element status
• Available from very low
ampere of 0.002A to 5A
Applications
Agency Approvals
• Printed circuit boards
and similar equipment
• Electronic components
Agency
Agency File Number
Ampere Range
E10480
29862
0.002A - 5A
Electrical Characteristics
0.002A - 5A
0.002A - 5A
% of Ampere Rating
Ampere Rating
0.002 – 5
OpeningTime
QPL-23419
QPL
100%
4 Hours, Min.
5 Seconds, Max.
2 Seconds, Max.
0.002 – 0.3
0.4 - 5
200%
Electrical Characteristics
Agency Approvals
Ampere
Rating
(A)
Amp Code
(for all above
series)
Max
Voltage
Rating (V)
Nominal Cold
Resistance
(Ohms)
Interrupting
Rating
Nominal Melting
I2t (A2 sec)
QPL
0.002
0.005
0.010
0.015
0.031
0.050
0.062
0.100
0.125
0.200
0.250
0.300
0.400
0.500
0.600
0.700
0.750
0.800
1.00
0.002
0.005
0.010
0.015
0.031
0.050
0.062
0.100
0.125
0.200
0.250
0.300
0.400
0.500
0.600
0.700
0.750
0.800
001.0
01.5
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
2200
280
80.0
44.0
16.0
3.52
2.55
1.38
1.0
0.00000000845
0.0000000766
0.000000462
0.00000123
0.00000810
0.0000666
0.000115
0.000385
0.000691
0.00409
0.00640
0.00945
0.0251
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
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
2.30
1.75
1.25
10,000A@125VAC/VDC
0.227
0.167
0.430
0.324
0.293
0.271
0.0880
0.0578
0.0425
0.0275
0.0202
0.0156
0.0716
0.0411
0.0710
0.0563
0.113
0.0648
0.160
0.300
01.5
2.00
3.00
*4.00
*5.00
002.0
003.0
004.0
005.0
0.759
1.38
2.21
* The fuses of 4A and 5A for 272 and 278 Series are obsolete.
© 2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Specifications are subject to change without notice. Application testing is strongly recommended.
Revised: 11/14/19