SURFACE MOUNT FUSES
THIN-FILM SURFACE MOUNT
1206
Very Fast-Acting Thin-Film Type 429 Series
鈥?For new designs below 4A please consult the 433 Series
ELECTRICAL CHARACTERISTICS:
% of Ampere
Rating
100%
200%
300%
Opening
Time at 25
擄
C
4 hours,
Minimum
5 seconds,
Maximum
0.2 seconds,
Maximum
廬
廬
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 鈥?3A
50 amperes at rated voltage, VAC/VDC
4 鈥?7A
35 amperes at rated voltage, VAC/VDC
ENVIRONMENTAL SPECIFICATIONS:
Operating Temperature:
鈥?55擄C to 90擄C. Consult tempera-
ture rerating chart on page 4. For operation above 90擄C
contact Littelfuse.
Vibration:
Withstands 10鈥?55 Hz per MIL-STD-202F,
Method 201A and 10-2000 Hz at 20 G鈥檚 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擄C up to 260擄C, maximum.
Thermal Shock:
Withstands 5 cycles of 鈥?55擄 to 125擄C.
PHYSICAL SPECIFICATIONS:
Materials:
Body: Epoxy Substrate
Terminations: Copper/Nickel/Tin-Lead (95/5)
Cover Coat: Conformal Coating
Soldering Parameters:
Reflow Solder 鈥?260擄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.
PATENTED
ORDERING INFORMATION:
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
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
Marking
Code
FB
FC
FD
FE
FF
FG
FH
FJ
FK
FL
FN
FO
FP
Nominal
Voltage
Rating
125
125
125
125
63
63
63
63
63
63
63
32
32
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
Melting I
2
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
RECOMMENDED PAD LAYOUTS
3.18
(.125")
1.52
(.060")
1.14
(.045")
1.52
(.060")
2.49 (.098")
REF.
3.81
(.150")
1.12
2.03
(.044")
(.080")
REF.
REFLOW SOLDER
1.14
(.045")
.635
(.025")
Average Time Current Curves
.125A
.2A
.25A
.375A
.5A
100
10
TIME IN SECONDS
1
0.1
For New Designs Below 4A Use 433 Series.
429
004
4.0
FS
24
0.01926
429
005
5.0
FT
24
0.01375
429
007
7.0
FU
24
0.00925
1
Measured at 10% of rated current, 25擄C.
2
Measured at rated voltage.
1.50
2.70
3.60
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
33
1
