272002.V [LITTELFUSE]
Electric Fuse, Very Fast Blow, 2A, 10000A (IR), MICRO,;
| 型号： | 272002.V |
| 厂家： | 
LITTELFUSE |
| 描述： | Electric Fuse, Very Fast Blow, 2A, 10000A (IR), MICRO, |
| 文件： | 总3页 (文件大小：155K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Radial Lead Fuses
MICRO™ > Very Fast-Acting > 272/273/274/278/279 Series
QPL
272/273/274/278/279 Series, MICRO™ Very Fast-Acting Fuse
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
1/500 to 5A to suit a wide variety of design needs.
Features
tꢀ Military grade available
tꢀ High breaking capacity
tꢀ Available from very low
ampere of 2mA to 5A
tꢀ Plug-in with short or long
tꢀ Clear cover option to view
leads option
fuse element status
Agency Approvals
Applications
Agency
Agency File Number
Ampere Range
tꢀ Printed circuit boards
tꢀ Electronic components
E10480
LR 29862
FM02
2mA - 5A
and similar equipment
2mA - 5A
2mA - 5A
Electrical Characteristics
QPL
% of Ampere
Rating
Ampere Rating
1/500–5
OpeningTime
100%
4 Hours, Min.
5 Seconds, Max.
2 Seconds, Max.
1/500–3/10
4/10-5
200%
Electrical Characteristics
Amp Code
Ampere
Rating
(A)
Max
Nominal
Agency Approvals
Nominal
Melting
(for all
above
series)
.002
.005
.010
Voltage
Rating
(V)
Interrupting
Rating
Cold
Resistance
(Ohms)
2200
I2t (A2 sec)
QPL
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
.002
.005
.010
.015
.031
.050
.062
.100
.125
.200
.250
.300
.400
.500
.600
.700
.750
.800
1.00
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
0.00000000845
0.00000000810
0.000000462
0.00000123
0.00000810
0.0000666
0.000115
0.000385
0.000691
0.00409
0.00640
0.00945
0.0251
280
80.0
44.0
16.0
3.20
2.32
1.25
1.0
.015
.031
.050
.062
.100
.125
.200
.250
.300
.400
.500
.600
.700
.750
.800
001.
2.30
1.75
1.25
10,000 amperes at
125 VAC/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
0.0900
0.113
0.0648
0.160
0.300
01.5
2.00
3.00
4.00
5.00
002.
003.
004.
005.
0.759
1.38
2.21
© 2009 Littelfuse, Inc.
272/273/274/278/279 Series
131
Revised: January 7, 2009
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/272.html, /273.html, /274.html,
/278.html or /279.html for current information.
Radial Lead Fuses
MICRO™ > Very Fast-Acting > 272/273/274/278/279 Series
Temperature Rerating Curve
AverageTime Current Curves
100
10
1
0.1
0.01
0.001
0.005 0.01
0.1
1
10
100
CURRENT IN AMPERES
Soldering Parameters -Wave Soldering
300
280
260
240
220
200
180
160
140
120
100
80
Recommended Process Parameters:
Wave Parameter
Preheat:
(Depends on Flux ActivationTemperature)
Temperature Minimum:
Temperature Maximum:
PreheatTime:
Lead-Free Recommendation
(Typical Industry Recommendation)
100° C
150° C
60-180 seconds
Solder PotTemperature:
Solder DwellTime:
260° C Maximum
2-5 seconds
60
40
20
0
Recommended Hand-Solder Parameters:
Time (Seconds)
Solder IronTemperature: 350° C +/- 5°C
HeatingTime: 5 seconds max.
Preheat Time
Dwell Time
Cooling Time
Note: These devices are not recommended for IR or
Convection Reflow process.
© 2009 Littelfuse, Inc.
272/273/274/278/279 Series
132
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/272.html, /273.html, /274.html,
/278.html or /279.html for current information.
Revised: January 7, 2009
Radial Lead Fuses
MICRO™ > Very Fast-Acting > 272/273/274/278/279 Series
Dimensions
Product Characteristics
Operating Temperature:
272 000 Series
(Short Lead, Metal Cap)
273 and 279: –55ºC to +85ºC;
272 and 278: –55ºC to +125ºC
5.97
(.235")
7.30
(.29")
4.32
273 Series is available in CSA LR
29862. Military QPL type (FM02).
To order, change 273 to 274.
(.17")
Fuses to MIL SPEC
Materials
2.54 (.10")
272 and 278 series cap:
Nickel Plated Brass
278 000 Series
273, 274 and 279 series cap:
Mirror polished Polycarbonate
(Long Lead, Metal Cap)
5.97
7.30
Base: R-4 Ryton
(.235")
(.29")
25.4 (1.0")
Pins: Tin Plated Copper
2.54 (.10")
Current and voltage ratings stamped
on cap
Product Marking
273 000 and 274 000 Series
(Short Lead, Clear Plastic Cap)
Part Numbering System
6.35
8.89
(.35")
4.32
(.25")
(.17")
0273 xxxx V
2.54 (.10")
Series
Amp. Code
279 000 Series
Refer to Amp Code column of
(Long Lead, Clear Plastic Cap)
6.35
Electrical CharacteristicsTable
8.89
(.35")
(.25")
25.4 (1.0")
Packaging Code
V = 5
H = 100
2.54 (.10")
NOTE: Amperage and voltage rating stamped on cap.
Leads are tin plated copper; .025" diameter.
Packaging
Quantity &
Quantity
Packaging Option
Packaging Specification
Packaging Code
Bulk
Bulk
N / A
N / A
5
V
100
H
© 2009 Littelfuse, Inc.
272/273/274/278/279 Series
133
Revised: January 7, 2009
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/272.html, /273.html, /274.html,
/278.html or /279.html for current information.
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