Littelfuse 275 User Manual
Axial Lead & Cartridge Fuses
PICO® > Very Fast-Acting > 275 Series
275 Series, PICO® Very Fast-Acting Fuse
Description
®
The PICO
Very Fast-Acting Fuse is designed to meet an
extensive array of performance characteristics in a
space-saving subminiature package.
Features
Agency Approvals
Agency Agency File Number Ampere Range
E10480 20A - 30A
Additional Information
Datasheet
Resources
Samples
Electrical Characteristics
Ampere
Rating
(A)
Amp Code
Ordering
Number
Max
Voltage
Rating
(V)
• Veryfast-acting
• Smallsize
• Highcurrentrating
(20A- 30A)
Applications
• Powersupply
• PCserver
Electrical Characteristics
% of Ampere
Rating
100% 20 - 30 4 Hours, Min.
200% 20 - 30 10 Seconds, Max.
Interrupting
Rating
• RoHScompliant
• Wideoperating
temperature range
• Lowtemperaturede-
rating
• Networkingequipment
• Storagesystem
Ampere Rating Opening Time
Nominal Cold
Resistance
(Ohms)
Nominal
Melting
2
t (A2 sec)
I
Agency
Approvals
20.0 020. 0275020. 32
25.0 025. 0275025. 32 0.0026 192 x
30.0 030. 0275030. 32 0.0020 288 x
© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 12/19/13
300 amperes @ rated voltage
VDC
100 amperes @ rated voltage
VAC
0.0031 115 x
Axial Lead & Cartridge Fuses
100
10
1
0.1
0.01
0.001
0.050.1 110100 1000
TIME IN SECONDS
CURRENT IN AMPERES
20A
25A
30A
PICO® > Very Fast-Acting > 275 Series
Average Time Current CurvesTemperature Rerating Curve
Note:
1. Derating depicted in this curve is in addition to the standard derating of 25% for
continuous operation.
Soldering Parameters
Recommended Process Parameters:
Wave Parameter Lead-Free Recommendation
Preheat:
(Depends on Flux Activation Temperature)
Temperature Minimum:
Temperature Maximum:
(Typical Industry Recommendation)
100
° C
150
° C
Preheat Time: 60-180 seconds
Solder Pot Temperature:
260
° C Maximum
Solder Dwell Time: 2-5 seconds
Recommended Hand-Solder Parameters:
Solder Iron Temperature: 350° C +/- 5°C
Heating Time: 5 seconds max.
Note: These devices are not recommended for IR or
Convection Reflow process.
Specifications are subject to change without notice.
© 2013 Littelfuse, Inc.
Revised: 12/19/13
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