321
© 2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Axial Lead & Cartridge Fuses
314/324 Series
3AB > Fast Acting > 314/324 Series
Please refer to www.littelfuse.com/series/314.html
or /324.html for current information.
314/324 Series
The 3AB Fast-Acting Fuse with ceramic body construction
permits higher interrupting ratings and voltage ratings. Ideal
for applications where high current loads are expected.
Agency Approvals
Agency Agency File Number Ampere Range
E10480 125mA - 15A
LR 29862 125mA - 20A
E10480 15A* - 40A
PS
E
NBK 030805 - E10480A-F
NBK 260106 - JP1021A/B 125mA - 30A
SU05001 -
6001/6002/6003/7006 125mA - 30 A
125mA - 30A
Features
Electrical Characteristics for Series
Applications
% of Ampere
Rating Ampere Rating Opening Time
100% 125mA – 30A 4 hours, Minimum
135% 125mA – 30A 1 sec.., Maximum
200% 125mA – 12A 15 sec., Maximum
15A – 30A 30 sec., Maximum
Electrical Characteristic Specification by Item
Amp
Code
Ampere
Rating
(A)
Voltage
Rating
(V)
Interrupting
Rating
Nominal
Cold
Resistance
(Ohms)
Nominal
Melting
I
2
t (A
2
sec)
Agency Approvals
PS
E
.125 0.125 250
35A@250Vac
10KA@125Vac
10KA@125Vdc
6.20 0.00149 xx x
.250 0.25 250 1.95 0.0140 xx x
.375 0.375 250 0.820 0.050 xx x
.500 0.5 250 0.500 0.115 xx x
.750 0.75 250 0.250 0.466 xx x
001. 1 250
100A@250Vac
10KA@125Vac
10KA@125Vdc
0.189 0.690 xx xx
002. 2 250 0.0700 11.0 xx xx
003. 3 250 0.0432 14.6 x x x x x
004. 4 250
750A@250Vac
10KA@125Vac
10KA@125Vdc
0.0470 10.4 x x x x x
005. 5 250 0.0300 26.0 x x x x x
006. 6 250 0.0240 45.0 x x x x x
007. 7 250 0.0187 71.0 x x x x x
008. 8 250 0.0153 105 x x x x x
010. 10 250 0.0105 206 x x x x x
012. 12 250 0.00760 570 xx xx
015. 15 250 0.00505 292 xx xx
015.* 15 280 0.00505 292 xx
020. 20 250
1000A@250Vac
200A@300Vac
10KA@125Vac
10KA@125Vdc
0.00355 631 x x x x
020.* 20 280 0.00355 631 x x
025. 25 250
100A@250Vac
1000@75Vdc
400@125Vac
400A@125Vdc
0.00235 1450 x x x x
025.** 25 280 0.00235 1450 x x
030. 30 250 0.00182 2490 xxxx
040. 40 250
1000A@250Vac
400A@150Vdc
0.0014 22925 x x
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Standard 248-14
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and axial lead format
and with various
forming dimensions
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Lead-free
Used as supplementary protection in appliance or
utilization equipment to provide individual protection for
components or internal circuits.
314/324 Series Lead-free 3AB, Fast-acting Fuse PS
E
* 350A@280Vac interrupting rating available for 15A and 20A. ** 50A@280Vac for 25A. Add suffix ’280’. Example: 0324020.MX280P.
Description
Revised: July 15, 2009
Introduction to Circuit Protection
Introduction to Circuit Protection
Transientology
322 © 2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Axial Lead & Cartridge Fuses
314/324 Series
3AB > Fast Acting > 314/324 Series
Please refer to www.littelfuse.com/series/314.html
or /324.html for current information.
Average Time Current Curves
1000
100
10
1
0.1
0.01
0.1 1 10 100 1000
1/8A
1/4A
3/8A
1/2A
3/4A
1A
2A
3A
4A
5A
6A
7A
8A
10A
12A
15A
20A
25A
30A
40A
TIME IN SECONDS
CURRENT IN AMPERES
Temperature Rerating Curve
Soldering Parameters - Wave Soldering
Dwell Time
0
20
40
60
80
100
120
140
160
180
200
220
240
260
280
300
0
10
20
30
40
50
60
70
80
90
100
110
120
130
140
150
160
170
180
190
200
210
220
230
240
Time (Seconds)
Temperature (°C) - Measured on bottom side of board
Cooling Time
Preheat Time
Wave Parameter Lead-Free Recommendation
Preheat:
(Depends on Flux Activation Temperature) (Typical Industry Recommendation)
Temperature Minimum: 100° C
Temperature Maximum: 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
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Note: These devices are not recommended for IR or
Convection Reflow process.
Recommended Process Parameters:
323
© 2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Axial Lead & Cartridge Fuses
314/324 Series
3AB > Fast Acting > 314/324 Series
Please refer to www.littelfuse.com/series/314.html
or /324.html for current information.
314/324 Series
Product Characteristics
Dimensions
Packaging
314 000P Series 324 000P Series
6.35 (.25")
32.72
(1.288")
31.75
(1.25")
6.985 (.275")
38.1
(1.50") TYP.
Axial Lead Material: Tin coated copper.
0.813 (.032") ( - 15A)
1.016 (.040") (20 - 30A)
18
/
Packaging Option Packaging Specification Quantity Quantity &
Packaging Code Reel Size
314 Series
Bulk N/A 5 VX N/A
Bulk N/A 100 )9 N/A
Bulk N/A 1000 MX N/A
Bulk N/A 1000 MX52L N/A
Bulk N/A 1000 MXCC N/A
Bulk N/A 1000 MX52LE N/A
324 Series
Bulk N/A 5 VX N/A
Bulk N/A 100 )9 N/A
Bulk N/A 1000 MX N/A
Bulk N/A 1000 MX280 N/A
Bulk N/A 1000 MX52 N/A
Bulk N/A 1000 MXF24 N/A
Materials
Body: Ceramic
Cap: Nickel–plated brass
Leads: Tin–plated Copper
Terminal Strength MIL-STD-202G, Method 211A, Test
Condition A
Solderability Reference IEC 60127 Second Edition
2003-01 Annex A
Product Marking
Cap1: Brand logo, current and voltage
ratings
Cap2: Series and agency approval
marks
Operating
Temperature –55ºC to +125ºC
Thermal Shock MIL-STD-202G, Method 107G, Test
Condition B: (5 cycles -65°C to +125°C)
Vibration MIL-STD-202G, Method 201 A
Humidity
MIL-STD-202G, Method 103B, Test
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temperature (40°C) for 240 hours
Salt Spray MIL- STD-202G, Method 101D, Test
Condition B
Part Numbering System
0314 M X Pxxxx
Lead-free
Packaging Code
Quantity Code
Amp Code
Series
X = Filler
M = 1000
Refer to Amp Code column of
Electrical Characteristics Table