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0494 Series Fast-Acting SMF

The 494 Series Fast-Acting SMF is an ultra small (0603 size) thin-film device.

  • Brand: Littelfuse
  • Classification: SMD Fuse
  • Voltage: 32V
  • Current: 0.25A-5A
Description:
 The 494 Series Fast-Acting SMF is an ultra small (0603 size) thin-film device designed for secondary protection of circuits used in space constrained applications such as hand-held portable electronic devices. This series is 100% lead-free and meets the requirements of the RoHS directive. New Halide-Free 494 Series fuses are available to order using the “HF” suffix. See Part Numbering section for additional information.

Features:

? Compatible with leadfree solders and higher temperature profiles

? High performance materials provide improved performance in elevated ambient temperature applications

? Marked on top surface with code to allow ampere rating identification without testing

? Low profile for height sensitive applications

? Flat top surface for pickand-place operations

? Element-covering material is resistant to industry standard cleaning operations

? Mounting pad and electrical performance are identical to Littelfuse 431 and 434 Series products

? Alloy-based element construction provides superior inrush withstand characteristics (I2t) over ceramic or glass-based 0603 fuse products

Applications:

Secondary protection for space constrained applications:

? Cell phones

? Digital cameras

? Hard disk drives

? Battery packs

? DVD players




Ampere Rating
(A)
Amp Code
Max Voltage Rating
(V)
Interruping Rating
Nominal Cold Resistance
(Ohms)
Nominal Melting I?t
(A?sec)
Nominal Voltage Drop
(mV)
Nominal Power Dissipation
(W)
0.250.25032
50A @32V AC/DC
0.5450
0.0030158.56
0.0396
0.375
.375
32
0.2900
0.0053
128.03
0.0480
0.500
.500
32
0.1870
0.0087
115.71
0.0579
0.750
.750
32
0.1170
0.0171
107.33
0.0805
1.00
001.
32
0.0710
0.0212
89.10
0.0891
1.25
1.25
32
35A @32V AC/DC
0.0530
0.0518
84.32
0.1054
1.40
01.4
32
0.049
0.05529
74.84
0.1048
1.50
01.5
32
0.0410
0.0766
81.14
0.1217
1.75
1.75
32
0.0320
0.0903
78.75
0.1378
2.00
002.
32
0.0300
0.1103
78.22
0.1564
2.50
02.5
32
0.0220
0.1440
76.10
0.1903
3.00
003.
32
0.0180
0.2403
75.04
0.2251
3.15
3.15
32
0.017
0.27405
63.78
0.2009
3.50
03.5
32
0.0150
0.4306
74.25
0.2599
4.00
004.
32
0.0130
0.5760
73.72
0.2949
5.00
005.
32
0.0090
0.9000
72.71
0.3635


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