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 I²t (A²sec) | Nominal Voltage Drop （mV） | Nominal Power Dissipation （W） |
| 0.250 | .250 | 32 | 50A @32V AC/DC | 0.5450 | 0.0030 | 158.56 | 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 |
Tag:
Littelfuse0494