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© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 03/03/17
Axial Lead & Cartridge Fuses
5×20 mm > Fast-Acting > 235 Series
Materials
Body: Glass
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
Cap 1: Brand logo, current and voltage
rating
Cap 2: Series and agency approval
markings
Packaging
Available in Bulk (M=1000 pcs/pkg) or on
Tape/Reel (MRET1=1000 pcs/reel)
Product Characteristics
Operating Temperature –55ºC to +125ºC
Thermal Shock
MIL-STD-202, Method 107, Test
Condition B: (5 cycles –65
O
C +
125
O
C)
Vibration MIL-STD-202, Method 201
Humidity
MIL-STD-202, Method 103, Test
Condition A high RH (95%) and
elevated temperature (40
O
C) for 240
hours
Salt Spray
MIL-STD-202, Method 101, Test
Condition B
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: