494 Series - SlimLine Lead-Free 0603 Fast-Acting Thin-Film Fuse

Series: 494
Questions? Contact Littelfuse Support
External overview image
Roll Over to Zoom
Disclaimer Notice

Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. "Littelfuse" includes Littelfuse, Inc., and all of its affiliate entities.

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 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

Applications:

Secondary protection for space constrained applications:

  • Cell phones
  • Battery packs
  • Digital cameras
  • DVD players
  • Hard disk drives

Access specifications, certifications, check availability and order parts below

Catalog #VDC (V)VAC (V)Nominal Melting I2T (A2sec)Resistance
(Ω)		OpeningOperating TemperatureSamplesCompare
0494.25032320.00140.59Very Fast-Acting (FF)-55° to 90°COrder
0494.37532320.00350.31Very Fast-Acting (FF)-55° to 90°COrder
0494.50032320.00870.1895Very Fast-Acting (FF)-55° to 90°COrder
0494.75032320.01710.1185Very Fast-Acting (FF)-55° to 90°COrder
0494001.32320.02120.078Very Fast-Acting (FF)-55° to 90°COrder
0494002.32320.18910.034Very Fast-Acting (FF)-55° to 90°COrder
0494003.32320.24030.022Very Fast-Acting (FF)-55° to 90°COrder
0494004.32320.8410.015Very Fast-Acting (FF)-55° to 90°COrder
0494005.32320.90.0105Very Fast-Acting (FF)-55° to 90°COrder
049401.532320.07660.0475Very Fast-Acting (FF)-55° to 90°COrder
049402.532320.20660.027Very Fast-Acting (FF)-55° to 90°COrder
049403.532320.43060.0185Very Fast-Acting (FF)-55° to 90°COrder
04941.2532320.05180.0615Very Fast-Acting (FF)-55° to 90°COrder
04941.7532320.09030.0405Very Fast-Acting (FF)-55° to 90°COrder
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s) IPC-Material Declaration
0494.250NR PROTECTOR SLIM 0603 32V .250A RoHS No 12/31/2001 PbFree No No
0494.250NRHF PRTCTR SLIM HALOGEN FREE 0603 32V .250A RoHS No 12/31/2001 PbFree No No
0494.250NRA PROTECTOR SLIM 0603 32V .250A RoHS No 12/31/2001 PbFree No No
0494.375NRHF PRTCTR SLIM HALOGEN FREE 0603 32V .375A RoHS No 12/31/2001 PbFree No No
0494.375NRA PROTECTOR SLIM 0603 32V.375A RoHS No 12/31/2001 PbFree No No
0494.375NR PROTECTOR SLIM 0603 32V.375A RoHS No 12/31/2001 PbFree No No
0494.500NRA PROTECTOR SLIM 0603 32V .500A RoHS No 12/31/2001 PbFree No No
0494.500NR PROTECTOR SLIM 0603 32V .500A RoHS No 12/31/2001 PbFree No No
0494.500NRHF PRTCTR SLIM HALOGEN FREE 0603 32V .500A RoHS No 12/31/2001 PbFree No No
0494.750NRHF PRTCTR SLIM HALOGEN FREE 0603 32V .750A RoHS No 12/31/2001 PbFree No No
0494.750NR PROTECTOR SLIM 0603 32V .750A RoHS No 12/31/2001 PbFree No No
0494.750NRA PROTECTOR SLIM 0603 32V .750A RoHS No 12/31/2001 PbFree No No
0494001.NR PROTECTOR SLIM 0603 32V 1A RoHS No 12/31/2001 PbFree No No
0494001.NRHF PRTCTR SLIM HALOGEN FREE 0603 32V 1A RoHS No 12/31/2001 PbFree No No
0494001.NRA PROTECTOR SLIM 0603 32V 1A RoHS No 12/31/2001 PbFree No No
0494002.NRHF PRTCTR SLIM HALOGEN FREE 0603 32V 2A RoHS No 12/31/2001 PbFree No Yes
0494002.NRA PROTECTOR SLIM 0603 32V 2A RoHS No 12/31/2001 PbFree No No
0494002.NR PROTECTOR SLIM 0603 32V 2A RoHS No 12/31/2001 PbFree No No
0494002.NRH PROTECTOR SLIM 0603 32V 2A RoHS No 12/31/2001 PbFree No No
0494003.NRHF PRTCTR SLIM HALOGEN FREE 0603 32V 3A RoHS No 12/31/2001 PbFree No No
0494003.NRA PROTECTOR SLIM 0603 32V 3A RoHS No 12/31/2001 PbFree No No
0494003.NR PROTECTOR SLIM 0603 32V 3A RoHS No 12/31/2001 PbFree No No
0494004.NR PROTECTOR SLIM 0603 32V 4A RoHS No 12/31/2001 PbFree No No
0494004.NRA PROTECTOR SLIM 0603 32V 4A RoHS No 12/31/2001 PbFree No No
0494004.NRHF PRTCTR SLIM HALOGEN FREE 0603 32V 4A RoHS No 12/31/2001 PbFree No No
0494005.NR PROTECTOR SLIM 0603 32V 5A RoHS No 12/31/2001 PbFree No No
0494005.NRHF PRTCTR SLIM HALOGEN FREE 0603 32V 5A RoHS No 12/31/2001 PbFree No Yes
0494005.NRA PROTECTOR SLIM 0603 32V 5A RoHS No 12/31/2001 PbFree No No
049401.5NR PROTECTOR SLIM 0603 32V 1.5A RoHS No 12/31/2001 PbFree No No
049401.5NRHF PRTCTR SLIM HALOGEN FREE 0603 32V 1.5A RoHS No 12/31/2001 PbFree No Yes
049401.5NRA PROTECTOR SLIM 0603 32V 1.5A RoHS No 12/31/2001 PbFree No No
049402.5NR PROTECTOR SLIM 0603 32V 2.5A RoHS No 12/31/2001 PbFree No No
049402.5NRHF PRTCTR SLIM HALOGEN FREE 0603 32V 2.5A RoHS No 12/31/2001 PbFree No No
049402.5NRA PROTECTOR SLIM 0603 32V 2.5A RoHS No 12/31/2001 PbFree No No
049403.5NR PROTECTOR SLIM 0603 32V 3.5A RoHS No 12/31/2001 PbFree No No
049403.5NRA PROTECTOR SLIM 0603 32V 3.5A RoHS No 12/31/2001 PbFree No No
049403.5NRHF PRTCTR SLIM HALOGEN FREE 0603 32V 3.5A RoHS No 12/31/2001 PbFree No No
04941.25NR PROTECTOR SLIM 0603 32V 1.25A RoHS No 12/31/2001 PbFree No No
04941.25NRA PROTECTOR SLIM 0603 32V 1.25A RoHS No 12/31/2001 PbFree No No
04941.75NRHF PRTCTR SLIM HALOGEN FREE 0603 32V 1.75A RoHS No 12/31/2001 PbFree No No
04941.75NRA PROTECTOR SLIM 0603 32V 1.75A RoHS No 12/31/2001 PbFree No No
04941.75NR PROTECTOR SLIM 0603 32V 1.75A RoHS No 12/31/2001 PbFree No No
If the product environmental information that you are looking for does not appear in this tab,
please complete the Product Environmental Information Request Form.