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
100%
200%
300%
Opening
Time at 25°C
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")
1.52
(.060")
1.14
(.045")
1.12
(.044")
REF.
1.52
(.060")
2.49 (.098")
REF.
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.
Thermal Shock:
Withstands 5 cycles of – 55° to 125°C.
3.81
(.150")
2.03
(.080")
REFLOW SOLDER
PHYSICAL SPECIFICATIONS:
Materials:
Body: Epoxy Substrate
Terminations: Copper/Nickel/Tin-Lead (95/5)
Cover Coat: Conformal Coating
1.14
(.045")
.635
(.025")
Soldering Parameters:
Reflow Solder — 260°C, 30 seconds maximum
Average Time Current Curves
.125A
.2A
.25A
.375A
.5A
100
10
TIME IN SECONDS
1
0.1
0.01
0.001
0.1
1
10
CURRENT IN AMPERES
100
.75A
1A
1.25A
1.5A
1.75A
2A
2.5A
3A
4A
5A
7A
PACKAGING SPECIFICATIONS:
8mm Tape and Reel per
EIA-RS481-1 (IEC 286, part 3); 3,000 per reel, add packaging suffix, WR.
PATENTED
ORDERING INFORMATION:
For New Designs Use 433 or 466 Series.
Catalog
Number
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
1
2
Ampere
Rating
0.125
0.200
0.250
0.375
0.500
0.75
1.00
1.25
1.50
1.75
2.0
2.5
3.0
4.0
5.0
7.0
Marking
Code
FB
FC
FD
FE
FF
FG
FH
FJ
FK
FL
FN
FO
FP
FS
FT
FU
Nominal
Voltage
Rating
125
125
125
125
63
63
63
63
63
63
63
32
32
24
24
24
Nominal
Resistance
Cold Ohms
1
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
Melting I t
(A
2
Sec.)
2
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
2.70
3.60
2
Measured at 10% of rated current, 25°C.
Measured at rated voltage.
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