Axial Lead & Cartridge Fuses
3AB > Time Lag > 325/326 Series
325/326 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
Standard 248-14
and axial lead format
and with various
forming dimensions
Ampere Range
Lead-free
Agency Approvals
Agency
Agency File Number
E10480
E10480
LR 29862
NBK 030805-
E10480A-F/
NBK 260106-
JP1021A/B
SU05010-
5012/6006/6007/7005
250mA - 10A
12A - 30A
250mA - 30A
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%
135%
200%
Ampere Rating
100mA – 30A
100mA – 30A
100mA – 3.2A
4A – 30A
Opening Time
4 hours, Minimum
1 hour, Maximum
PS
E
1A - 30A
2.5A - 3.2A/
7A - 30A
10mA - 30A
5 sec., Min., 60 sec., Max.
© 2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/325.html
or /326.html for current information.
329
Revised: January 7, 2009
325/326 Series
325/326 Series
5 sec., Min., 30 sec., Max.
Introduction to & Cartridge Fuses
Axial Lead Circuit Protection
3AB > Time Lag > Transientology
325/326 Series
Electrical Characteristic Specifications by Item
Ampere
Rating
(A)
0.01
0.031
0.062
0.1
0.125
0.15
0.175
0.187
0.2
0.25
0.3
0.375
0.4
0.5
0.6
0.7
0.75
0.8
1
1.2
1.25
1.5
1.6
2
2.5
2.8
3
3.2
4
5
6.25
7
8
10
12
12
15
15
Voltage
Rating
(V)
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
125
125
400A@125Vac
10KA@60Vdc
600A@125Vdc
400A@250Vac
10KA@125Vac
500A@60Vdc
400A@250Vac
10KA@125Vac
100A@250Vac
100KA@125Vac
100A@250Vac
10KA@125Vac
10KA@125Vdc
Amp Code
.010
.031
.062
.100
.125
.150
.175
.187
.200
.250
.300
.375
.400
.500
.600
.700
.750
.800
001.
01.2
1.25
01.5
01.6
002.
02.5
02.8
003.
03.2
004.
005.
6.25
007
.
008.
010.
012.
012.*
015.
015.*
020.
020.*
025.
030.
Interrupting
Rating
Nominal Cold
Resistance
(Ohms)
3324.8000
332.5000
91.7000
33.5500
Nominal
Melting
I
2
t (A
2
sec)
0.00148
0.0110
0.0276
0.0870
0.100
0.143
0.220
0.230
0.213
0.432
0.690
1.20
1.33
2.50
3.90
6.42
7
.00
8.20
16.3
22.0
24.0
40.1
45.0
80.0
136.0
170.0
200.0
214.0
9.71
25.0
60.4
47
.3
67
.1
137
129
445
245
760
575
1900
1030
1690
Agency Approvals
PS
E
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
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x
x
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x
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x
x
x
x
x
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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
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x
x
x
x
x
x
x
x
x
x
x
x
x
x
100A@250Vac
22.4500
15.4500
8.9200
7
.7250
6.7700
4.4300
3.2200
2.1550
1.9350
1.3000
0.9495
0.7215
0.6410
0.5725
0.3890
0.2860
0.2680
0.1975
0.1760
0.1210
0.0835
0.0695
0.0605
0.0539
0.0761
0.0522
0.0346
0.0227
0.0193
0.0132
0.0067
0.0011
0.0050
0.0083
0.0034
0.0042
0.0024
0.0019
20
20
25
30
*Higher I
2
t version available. 0325020.MXDP nominal I
2
t is 2507 A
2
Sec
325/326 Series
330
Revised: January 7, 2009
© 2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/325.html
or /326.html for current information.
Axial Lead & Cartridge Fuses
3AB > Time Lag > 325/326 Series
Temperature Rerating Curve
Average Time Current Curves
1000
100
10
TIME IN SECONDS
1
0.1
0.01
0.05 0.1
.375A
.500A
.750A
1.0A
1.5A
2.0A
2.5A
3.0A
3.5A
4.0A
5.0A
6.25A
7.0A
8.0A
10.0A
12.0A
15.0A
20.0A
25.0A
30.0A
1
10
CURRENT IN AMPERES
100
1000
Soldering Parameters - Wave Soldering
300
Temperature
(°C) - Measured on bottom side of board
280
260
240
220
200
180
160
140
120
100
80
60
40
20
100
110
120
130
140
150
160
170
180
190
200
210
220
230
240
10
20
30
40
50
60
70
80
90
0
0
Recommended Process Parameters:
Wave Parameter
Preheat:
(Depends on Flux Activation Temperature)
(Typical Industry Recommendation)
Lead-Free Recommendation
Temperature Minimum:
Temperature Maximum:
Preheat Time:
Solder Pot Temperature:
Solder Dwell Time:
100
°
C
150
°
C
60-180 seconds
260
°
C Maximum
2-5 seconds
Time
(Seconds)
Preheat
Time
Dwell
Time
Cooling
Time
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.
© 2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/325.html
or /326.html for current information.
331
Revised: January 7, 2009
325/326 Series
325/326 Series
Introduction to & Cartridge Fuses
Axial Lead Circuit Protection
3AB > Time Lag > Transientology
325/326 Series
Product Characteristics
Materials
Terminal Strength
Solderability
Body: Ceramic
Cap: Nickel–plated brass
Leads: Tin–plated Copper
MIL-STD-202G, Method 211A,
Test Condition A
Reference IEC 60127 Second Edition
2003-01 Annex A
Cap1:
Product Marking
Cap2:
Brand logo, current and voltage
ratings
Series and agency approval
marks
Operating Temperature
Thermal Shock
Vibration:
Humidity
–55ºC to +125ºC
MIL
-STD-202G, Method 107G, Test
Condition B:(5 cycles - 65ºC to
125ºC)
MIL
-STD-202G, Method 201A
MIL
-STD-202G, Method 103B, Test
Condition A: High RH (95%) and
Elevated temperature(40ºC) for 240
hours
MIL
-STD-202G, Method 101D, Test
Condition B
Salt Spray
Dimensions
Part Numbering System
326
000P
Series
6.985 (.275")
6.35 (.25")
31.75
(1.25")
325
000P
Series
0.813 (.032") (
1/100
-15A)
1.016 (.040") (20 -30A)
0325 xxxx M X P
Series
Amp Code
Refer to Amp Code column of
Electrical Characteristics Table
32.72
(1.288")
38.1
(1.50") TYP
.
Quantity Code
M = 1000
Axial Lead Material: Tin coated copper.
Packaging Code
X = Filler
Lead-free
Packaging
Packaging Option
325 Series
Bulk
Bulk
Bulk
Bulk
Bulk
Bulk
Bulk
326 Series
Bulk
Bulk
Bulk
Bulk
Bulk
Packaging Specification
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Quantity
5
100
1000
1000
1000
1000
1000
5
100
1000
1000
1000
Quantity &
Packaging Code
VX
HX
MX
MX52
MX52L
MXD
MXF31
VX
HX
MX
MXCC
MXD
Reel Size
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
325/326 Series
332
Revised: January 7, 2009
© 2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/325.html
or /326.html for current information.
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