© 2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 02/05/19
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 –65OC +
125OC)
Vibration MIL-STD-202, Method 201
Humidity
MIL-STD-202, Method 103, Test
Condition A high RH (95%) and
elevated temperature (40O 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
0
10
20
30
40
50
60
70
80
90
100
110
120
130
140
150
160
170
180
190
200
210
220
230
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: