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494 Series - SlimLine Lead-Free 0603 Fast-Acting Thin-Film Fuse
Brand: Littelfuse, IncThe 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 lead-free 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 pick-and-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
Specifications
Brand
Materials
- Body: Advanced High Temperature Substrate
- Element Cover Coat: Conformal Coating
- Terminations: 100 % Tin over Nickel over Copper
Operating Temperature
- -55° to 90° C
- Consult temperature re-rating curve chart. For operation above 90° C contact Littelfuse.
Humidity
- MIL-STD-202F, Method 103B, Condition D
Insulation Resistance (After Opening)
- Greater than 10,000 ohms
Thermal Shock
- Withstands 5 cycles of -55° to 125° C
Vibration
- Per MIL-STD-202F
Resistance to Soldering Heat
- Withstands 60 seconds above 200° C and up to 260° C, Max.
Approvals
- UL
- CSA
- Secondary Protection for Space Constrained Applications
- Cell Phones
- Battery Packs
- Digital Cameras
- DVD Players
- Hard Disk Drives
