Surface Mount Fuses
Thin-Film Surface Mount
®
®
1206 Very Fast-Acting Fuse 429 Series
•
For new designs please consult the 433 or 466 Series on pages 258-260.
ELECTRICAL CHARACTERISTICS:
% of Ampere
Rating
Opening
Time at 25°C
100%
200%
300%
4 hours, Minimum
5 seconds, Maximum
0.2 seconds, Maximum
AGENCY APPROVALS: Recognized under the Components Program
of Underwriters Laboratories and Certified by CSA.
AGENCY FILE NUMBERS: UL E10480, CSA LR 29862.
INTERRUPTING RATINGS:
0.125 – 3A
4 – 7A
50 amperes at rated voltage, VAC/VDC
35 amperes at rated voltage, VAC/VDC
RECOMMENDED PAD LAYOUTS
3.18
(.125")
ENVIRONMENTAL SPECIFICATIONS:
Operating Temperature: –55°C to 90°C. Consult temperature rerat-
ing chart on page 4. For operation above 90°C contact Littelfuse.
Vibration: Withstands 10–55 Hz per MIL-STD-202F,
Method 201A and 10-2000 Hz at 20 G’s per MIL-STD-202F, Method
204D, Condition D.
Insulation Resistance (After Opening): Greater than 10 KOhm.
Resistance to Soldering Heat: Withstands 60 seconds above
200°C up to 260°C, maximum.
1.52
1.52
3.81
(.060")
(.060")
(.150")
1.14
(.045")
2.49 (.098")
REF.
1.12
2.03
(.080")
(.044")
REF.
REFLOW SOLDER
1.14
(.045")
Thermal Shock: Withstands 5 cycles of –55° to 125°C.
PHYSICAL SPECIFICATIONS:
Materials: Body: Epoxy Substrate
Terminations: Copper/Nickel/Tin-Lead (95/5)
Cover Coat: Conformal Coating
.635
(.025")
Soldering Parameters:
Average Time Current Curves
Reflow Solder — 260°C, 30 seconds maximum
PACKAGING SPECIFICATIONS: 8mm Tape and Reel per
EIA-RS481-1 (IEC 286, part 3); 3,000 per reel, add packaging suffix, WR.
100
PATENTED
ORDERING INFORMATION:
For New Designs Use 433 or 466 Series.
10
Nominal
Voltage
Rating
Nominal
Resistance
Cold Ohms1
Catalog
Number
Ampere
Rating
Marking
Code
Melting I2t
(A2 Sec.)2
429.125
429.200
429.250
429.375
429.500
429.750
429 001
429 1.25
429 01.5
429 1.75
429 002
429 02.5
429 003
429 004
429 005
429 007
0.125
0.200
0.250
0.375
0.500
0.75
1.00
1.25
1.50
1.75
2.0
FB
FC
FD
FE
FF
FG
FH
FJ
125
125
125
125
63
63
63
63
63
63
63
2.30000
0.93800
0.62500
0.37500
0.24050
0.13700
0.09950
0.07475
0.06250
0.05000
0.03975
0.03065
0.02625
0.01926
0.01375
0.00925
0.00020
0.00055
0.00100
0.00280
0.0060
0.0170
0.035
0.065
0.125
0.150
0.230
0.500
0.700
1.50
1
0.1
0.01
FK
FL
FN
FO
FP
FS
FT
FU
2.5
3.0
4.0
5.0
32
32
24
24
2.70
3.60
7.0
24
1 Measured at 10% of rated current, 25°C.
2 Measured at rated voltage.
0.001
0.1
1
10
100
CURRENT IN AMPERES
364
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