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Axial Lead Fuses
3AB > Time Lag > 325SP Series
325SP Series Lead-Free 3AB, Slo-Blo® Fuse
PS
E
Description
The 3AB Slo-Blo® Fuse with ceramic body construction
permits higher interrupting ratings and voltage ratings.
Ideal for applications where high current loads are
expected.
Features
Agency Approvals
Agency Agency File Number Ampere Range
E10480 12A - 20A
LR 29862 12A - 20A
NBK 030805-
PS
E
E10480F/
NBK 260106JP1021B
SU05001-5011
SU05001-5012
12A - 20A
12A - 20A
12A - 20A
• InaccordancewithUL
Standard 248-14
• RoHScompliantand
Lead-free
• Availableinaxiallead
format and with various
forming dimensions
Applications
Used as supplementary protection in appliance or
utilization equipment to provide individual protection for
components or internal circuits.
Electrical Characteristics for Series
% of Ampere
Rating
100% 12 – 20A 4 hours, Minimum
135% 12 – 20A 1 hour, Maximum
200% 12 – 20A 5 sec., Min., 60 sec., Max.
Ampere Rating Opening Time
© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 11/13/13
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Axial Lead Fuses
300
240
Temperature (°C) - Measured on bottom side of board
3AB > Time Lag > 325SP Series
Electrical Characteristic Specifications by Item
Amp Code
Rating
(A)
012. 12 250
015. 15 250 0.0050 245 x x x x x
020. 20 250 0.0034 575 x x x x x
Temperature Rerating Curve
Ampere
Voltage
Rating
(V)
Interrupting
Rating
400A@250Vac
10KA@125Vac
600A@125Vdc
Nominal Cold
Resistance
(Ohms)
Nominal Melting
2
t (A2 sec)
I
0.0067 129 x x x x x
Average Time Current Curves
1000
100
10
1
TIME IN SECONDS
0.1
0.01
Agency Approvals
PS
E
10
CURRENT IN AMPERES
12.0A
15.0A
20.0A
100 10000.1 10.01
Soldering Parameters - Wave Soldering
280
260
240
220
200
180
160
140
120
100
80
60
40
20
0
0
102030405060708090
Time (Seconds)
Preheat Time
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
100
110
120
130
140
150
160
170
180
190
200
210
220
230
Recommended Hand-Solder Parameters:
Dwell Time
Cooling Time
Solder Iron Temperature: 350° C +/- 5°C
HeatingTime:5secondsmax.
Note: These devices are not recommended for IR or
Convection Reflow process.
Specifications are subject to change without notice.
© 2013 Littelfuse, Inc.
Revised: 11/13/13
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Axial Lead Fuses
325 000SP Series
(axial leaded)
31.74±0.8
(1.25")
6.36±0.1
(.250")
Axial Lead Diameter:
0.81±0.05 (.032") for
(8A - 15A)
1.02±0.05 (.040") for
(20A)
Axial Lead Length:
21.0±1.0 (0.83") TYP.
Axial Lead Material:
Tin-coated copper
0325 MXSPxxxx
P
3AB > Time Lag > 325SP Series
Product Characteristics
Materials
Cap: Nickel–plated brass
Leads: Tin–plated Copper
Body: Ceramic
Terminal Strength
Solderability
MIL-STD-202G, Method 211A,
Test Condition A
Reference IEC 60127 Second Edition
2003-01 Annex A
Cap1: Brand logo, current and voltage
Product Marking
ratings
Cap2: Series and agency approval
marks
Dimensions
Measurements displayed in millimeters (inches)
Operating Temperature –55ºC to +125ºC
MIL-STD-202G, Method 107G, Test
Thermal Shock
Condition B:(5 cycles - 65ºC to
125ºC)
Vibration: MIL-STD-202G, Method 201A
MIL-STD-202G, Method 103B, Test
Humidity
ConditionA:HighRH(95%)and
Elevated temperature(40ºC) for 240
hours
Salt Spray
MIL-STD-202G, Method 101D, Test
Condition B
Part Numbering System
Series
Amp Code
Refer to Amp Code column of
Electrical Characteristics Table
Quantity Code
M = 1000
Packaging Code
X = Filler
Single Cap Pigtail
Lead-free
Packaging
Packaging Option Packaging Specification Quantity
325SP Series
© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 11/13/13
Quantity &
Packaging Code
Taping Width
Bulk N/A 1000 MXSPP N/A
Bulk N/A 1000 MXF48SPP N/A
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