Axial Lead & Cartridge Fuses
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3AB > High I2t > 328 Series
328 Series, Lead-Free 3AB, High Surge Withstanding Fuse
Description
The – is a 300VAC rated, 10kA surge withstanding,
6.3×32mm ceramic fuse, designed in accordance to
UL248-14 Standard, provided in cartridge and axial-lead
packages.
Features
Agency Approvals
Agency Agency File Number Ampere Range
T5026058201 21A
E10480 21A
% of Ampere Rating Opening Time
100%
200%
4 hours, minimum
120 sec., maximum
Electrical Characteristic by ltem
• Highsurgewithstanding
capability
– 20 hits of 10kA 8/20μs
surge
– Meets ANSI/IEEE
C62.41, Category
C-High
– Meets US Dept of
Energy (DOE) MSSLC/
CBEA street lighting
and parking lot
lighting, elevated level
• Smallformfactor
(6.3×32mm) with
cartridge and axial-lead
package options
• Breakingcapacity:
200A@300VAC,
200A@100VDC
• Lead-free,RoHS
compliant, halogen-free
• CompliantwithUL248-
14 and NFPA 70
(NEC) primary fusing
requirements
• Operatingtemperature:
–55°C to 125 °
ApplicationsElectrical Characteristics for Series
Commercial and outdoor LED luminaries
Outdoor electronics and electrical equipment.
Surge protection for telecom application.
Amp Rating
(A)
21 300
© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 12/19/13
Voltage Rating
(VAC)
Interrupting
Rating
200A@300VAC
200A@100VDC
Surge
Rating
1.2/50 - 8/20µs,
20kV/10kA 20
hits
Nominal Cold
Resistance
(Ohms)
0.0042 4,800
Nominal Melting
2
t (A2 sec)
I
Additional Information
Datasheet
Resources
Agency Approvals
X
Samples
X
Axial Lead & Cartridge Fuses
300
240
Temperature (°C) - Measured on bottom side of board
3AB > High I2t > 328 Series
Temperature Rerating Curve
Average Time Current Curves
21 A
10000
1000
100
10
Time (seconds)
1
0.1
0.01
0.001
10 100 1000
Amps
Soldering Parameters - Wave Soldering
Recommended Process Parameters:
280
260
240
220
200
180
160
140
120
100
80
60
40
20
0
0
102030405060708090
Time (Seconds)
Preheat Time
100
110
120
130
140
150
160
170
180
190
200
210
220
230
Dwell Time
Cooling Time
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
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.
Specifications are subject to change without notice.
© 2013 Littelfuse, Inc.
Revised: 12/19/13
Axial Lead & Cartridge Fuses
3AB > High I2t > 328 Series
Product Characteristics
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
Dimensions
Measurements displayed in millimeters (inches).
6.35 (.25”)
±0.3
31.75
(1.25˝)
±1.12
6.985 (.275˝)
±0.3
32.72
(1.288˝)
±1.12
1.20 (0.05˝)
±0.05
38.1
(1.50˝)
±3.15
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 201A
MIL-STD-202G, Method 103B, Test
Humidity
Condition A. High RH (95%) and
elevated temperature (40
°
C) for 240
hours.
Salt Spray
MIL-STD-202G, Method 101D, Test
Condition B
Part Numbering System
0328 M X E Pxxxx
Series
Amp Code
Refer to Amp Code column of
Electrical Characteristics Table
Quantity Code
M = 1000
Packaging Code
X = Filler
Option Codes
Blank: Cartridge Type Fuse
E: Axial Lead Fuse
Packaging
Packaging Option Packaging Specification Quantity
328 Series
Bulk N/A 1000 MX N/A
© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 12/19/13
Lead-free
Quantity &
Packaging Code
Taping Width
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