© 2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 01/02/18
Axial Lead & Cartridge Fuses
3AB > Fast-Acting > 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 0.375A - 15A
29862 0.375A - 20A
E10480 15A* - 40A
PS
E
314 Series:
NBK030805-E10480A
NBK030805-E10480C
NBK030805-E10480E
NBK260106-JP1021A
324 Series:
BNK030805-E10480B
NBK030805-E10480D
NBK030805-E10480F
NBK260106-JP1021B
1A - 3.5A
4A - 5A
6A - 15A
20A - 30A
1A - 3.5A
4A - 5A
6A - 15A
20A - 30A
SU05001-6003
SU05001-6001
SU05001-6006
SU05001-8002
SU05001-8003
SU05001-6002
3A
4-6A
7-10A
12-15A
20A
25-30A
N/A 0.375A - 30A
Features
Electrical Characteristics for Series
Applications
RoHS
% of Ampere
Rating Ampere Rating Opening Time
100% 0.375 - 40 4 hours, Minimum
135% 0.375 - 30 1 hour, Maximum
200% 0.375 - 12 15 secs., Maximum
15 - 30 30 secs., Maximum
250% 40 30 secs., Maximum
• In accordance with UL
Standard 248-14
• Available in cartridge
and axial lead format
and with various forming
dimensions
• RoHS compliant and
Lead-free
Used as supplementary protection in appliance or
utilization equipment to provide individual protection for
components or internal circuits.
Pb
314/324 Series Lead-free 3AB, Fast-Acting Fuse PS
E
Description
Application testing is strongly recommended.
Additional Information
Datasheet Samples
Resources
Datasheet Samples
Resources
314 Series
314 Series 314 Series 314 & 324 Series
Accessories
For recommended fuse accessories for this product series,
see ‘Recommended Accessories’ section.
324 Series
324 Series 324 Series
© 2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 01/02/18
Axial Lead & Cartridge Fuses
3AB > Fast-Acting > 314/324 Series
Average Time Current Curves
1000
100
10
1
0.1
0.01
0.1 110100 1000
.375A
.500A
.750A
1A
2A
3A
4A
5A
6A
7A
8A
10A
12A
15A
20A
25A
30A
40A
TIME IN SECONDS
CURRENT IN AMPERES
Temperature Re-rating Curve
Note:
Rerating depicted in this curve is in addition to the standard derating of 25%
for continuous operation.
Electrical 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
.375 0.375 250 35 A @ 250 VAC
10 kA @ 125 VAC
10 kA @ 125 VDC
0.820 0.210 x x x
.500 0.5 250 0.500 0.639 x x x
.750 0.75 250 0.250 2.061 x x x
0 01. 1 250
100 A @ 250 V
AC
10
kA
@ 125 V
AC
10
kA
@ 125 V
DC
0.189 0.690 x x x x
002. 2 250 0.0700 5.700 x x x x
003. 3 250 0.0432 14.6 x x x x x
004. 4 250
750 A @ 250 V
AC
10
kA
@ 125 V
AC
10
kA
@ 125 V
DC
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
0 0 7. 7 250 0.0187 71.0 x x x x x
008. 8 250 0.0153 105 xxx xx
010. 10 250 0.0105 206 x x x x x
010.* 10 280 0.0105 206 x x
012. 12 250 0.00760 570 x x x x x
015. 15 250 0.00505 292 x x x x x
015.* 15 280 0.00505 292 x x
020. 20 250
1000 A @ 250 V
AC
200 A @ 300 V
AC
10
kA
@ 125 V
AC
10
kA
@ 125 V
DC
0.00355 631 x x x x x
020.* 20 280 0.00355 631 x x
025. 25 250
100 A @ 250 V
AC
1000 A @ 75 V
DC
400 A @ 125 V
AC
400 A @ 125 V
DC
0.00235 1450 x x x x
025.** 25 280 0.00235 1450 x x
030. 30 250 0.00182 2490 x x x x
040. 40 250
1000 A @ 250 V
AC
400 A @ 150 V
DC 0.0014 22925 x x
* 350A@280VAC interrupting rating available for 10A, 15A and 20A. ** 50A@280VAC for 25A. Add suffix ’280’. Example: 0324020.MX280P.
I2t test at 10x rated current
© 2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 01/02/18
Axial Lead & Cartridge Fuses
3AB > Fast-Acting > 314/324 Series
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
Heating Time: 5 seconds max.
Note: These devices are not recommended for IR or
Convection Reflow process.
Recommended Process Parameters:
Product Characteristics
Materials
Body: Ceramic
Cap: Nickel–plated Brass
Leads: Tin–plated Copper
Terminal Strength MIL-STD-202, Method 211, Test
Condition A
Solderability MIL-STD-202 Method 208
Product Marking
Cap1: Brand logo, current and voltage
ratings
Cap2: Series and agency approval
marks
Operating
Temperature –55ºC to +125ºC
Thermal Shock MIL-STD-202, Method 107, Test Condition
B (5 cycles, -65°C to +125°C)
Vibration MIL-STD-202, Method 201
Humidity
MIL-STD-202, Method 103, Test
Condition A (High RH (95%) and Elevated
temperature (40°C) for 240 hours)
Salt Spray MIL- STD-202, Method 101, Test
Condition B
314 000P Series
(cartridge)
324 000P Series
(axial leaded)
6.35±0.3
(.25")
32.72±1.12
(1.288")
31.75±1.12
(1.25")
6.985±0.3
(.275")
Axial Lead Diameter:
0.81±0.05 (.032") for
(.125A - 15A)
1.02±0.06 (.040") for
(20A - 40A)
Axial Lead Length:
38.1±3.15 (1.50") TYP.
52±3 (2.0") for Long Lead
Axial Lead Material:
Tin-coated copper
Part Numbering System
0314 MX Pxxxx
Lead-free
Packaging Code
Quantity Code
Amp Code
Series
X = Filler
M = 1000
Refer to Amp Code column of
Electrical Specification Table
Dimensions
Measurements displayed in millimeters (inches)
© 2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 01/02/18
Axial Lead & Cartridge Fuses
3AB > Fast-Acting > 314/324 Series
Recommended Accessories
Accessory
Type Series Description
Max
Application
Voltage
Max
Application
Amperage
Holder
155100 Twist-Lock In-Line Fuseholder 32 20
342 Traditional Panel Mount Fuseholder 250 20
346 Panel Mount Flip-Top Shock-Safe Fuseholder 250 15
345 Shock-Safe Fuseholder with PC Mount, Solder Mount and Panel Mount options 250 20
Block 354 Low Profile OMNI-BLOK® Fuse Block 600 30
359 High Current Screw Terminal Fuse Block 30
Clip 122 High Current Traditional PC Board Fuse Clip 1000 30
101 Rivet/Eyelet Type Fuse Clip 1000 15
Notes:
1. Do not use in applications above rating.
2. Please refer to fuseholder data sheet for specific re-rating information.
3. Please contact factory for applications greater than the max voltage and amperage shown.
Disclaimer Notice - Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each
product selected for their own applications. Littelfuse products are not designed for, and may not be used in, all applications. Read complete Disclaimer Notice at:
www.littelfuse.com/disclaimer-electronics.
Packaging
Packaging
Option
Packaging
Specification Quantity
Quantity &
Packaging
Code
Taping
Width
314 Series
Bulk N/A 5 VX N/A
Bulk N/A 100 HX N/A
Bulk N/A 1000 MX N/A
Bulk N/A 1000 MX52L
(long lead) N/A
Bulk N/A 1000 MXCC N/A
Bulk N/A 1000 MX52LE
(long lead) N/A
324 Series
Bulk N/A 5 VX N/A
Bulk N/A 100 HX N/A
Bulk N/A 1000 MX N/A
Bulk N/A 1000 MX280 N/A
Bulk N/A 1000 MX52
(long lead) N/A
Bulk N/A 1000 MXF24 N/A
