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

Series: 494
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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 TemperaturePartner ECAD ModelsSamplesCompare
0494.25032320.00140.59Very Fast-Acting (FF)-55° to 90°C0494.250Order
0494.37532320.00350.31Very Fast-Acting (FF)-55° to 90°C0494.375Order
0494.50032320.00870.1895Very Fast-Acting (FF)-55° to 90°C0494.500Order
0494.75032320.01710.1185Very Fast-Acting (FF)-55° to 90°C0494.750Order
0494001.32320.02120.078Very Fast-Acting (FF)-55° to 90°C0494001.Order
0494002.32320.18910.034Very Fast-Acting (FF)-55° to 90°C0494002.Order
0494003.32320.24030.022Very Fast-Acting (FF)-55° to 90°C0494003.Order
0494004.32320.8410.015Very Fast-Acting (FF)-55° to 90°C0494004.Order
0494005.32320.90.0105Very Fast-Acting (FF)-55° to 90°C0494005.Order
049401.532320.07660.0475Very Fast-Acting (FF)-55° to 90°C049401.5Order
049402.532320.20660.027Very Fast-Acting (FF)-55° to 90°C049402.5Order
049403.532320.43060.0185Very Fast-Acting (FF)-55° to 90°C049403.5Order
04941.2532320.05180.0615Very Fast-Acting (FF)-55° to 90°C04941.25Order
04941.7532320.09030.0405Very Fast-Acting (FF)-55° to 90°C04941.75Order
Catalog # Certificates
Sorting icon
0494.250 CSAicon
0494.375 CSAicon
0494.500 CSAicon
0494.750 CSAicon
0494001. CSAicon
0494002. CSAicon
0494003. CSAicon
0494004. CSAicon
0494005. CSAicon
049401.5 CSAicon
049402.5 CSAicon
049403.5 CSAicon
04941.25 CSAicon
04941.75 CSAicon
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 CoC_RoHS10_0494.250NR REACH211_Declaration_0494.250NR No
Does not Contain IPC_494xxx_Series
0494.250NRHF PRTCTR SLIM HALOGEN FREE 0603 32V .250A RoHS No 12/31/2001 PbFree No CoC_RoHS10_0494.250NRHF REACH191_Declaration_0494.250NRHF No
Does not Contain IPC_494HF
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 CoC_RoHS10_0494.375NRHF REACH_SVHC Declaration_0494.375NRHF No
Does not Contain IPC_494HF
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 CoC_RoHS10_0494.375NR REACH197_Declaration_0494.375NR No
Does not Contain IPC_494xxx_Series
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 CoC_RoHS10_0494.500NR REACH219_Declaration_0494.500NR No
Does not Contain IPC_494xxx_Series
0494.500NRHF PRTCTR SLIM HALOGEN FREE 0603 32V .500A RoHS No 12/31/2001 PbFree No CoC_RoHS10_0494.500NRHF No
IPC_494HF
0494.750NRHF PRTCTR SLIM HALOGEN FREE 0603 32V .750A RoHS No 12/31/2001 PbFree No CoC_RoHS10_0494.750NRHF REACH_SVHC Declaration_0494.750NRHF No
Does not Contain IPC_494HF
0494.750NR PROTECTOR SLIM 0603 32V .750A RoHS No 12/31/2001 PbFree No CoC_RoHS10_0494.750NR REACH201_Declaration_0494.750NR No
Does not Contain IPC_494xxx_Series
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 CoC_RoHS10_0494001.NR REACH219_Declaration_0494001.NR No
Does not Contain IPC_494xxx_Series
0494001.NRHF PRTCTR SLIM HALOGEN FREE 0603 32V 1A RoHS No 12/31/2001 PbFree No CoC_RoHS10_0494001.NRHF No
IPC_494HF
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 CoC_RoHS10_0494002.NRHF REACH219_Declaration_0494002.NRHF Yes
Does not Contain IPC_494HF
0494002.NRA PROTECTOR SLIM 0603 32V 2A RoHS No 12/31/2001 PbFree No Yes
0494002.NR PROTECTOR SLIM 0603 32V 2A RoHS No 12/31/2001 PbFree No CoC_RoHS10_0494002.NR REACH197_Declaration_0494002.NR Yes
Does not Contain IPC_494xxx_Series
0494002.NRH PROTECTOR SLIM 0603 32V 2A RoHS No 12/31/2001 PbFree No Yes
0494003.NRHF PRTCTR SLIM HALOGEN FREE 0603 32V 3A RoHS No 12/31/2001 PbFree No CoC_RoHS10_0494003.NRHF REACH205_Declaration_0494003.NRHF No
Does not Contain IPC_494HF
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 CoC_RoHS10_0494003.NR REACH191_Declaration_0494003.NR No
Does not Contain IPC_494xxx_Series
0494004.NR PROTECTOR SLIM 0603 32V 4A RoHS No 12/31/2001 PbFree No CoC_RoHS10_0494004.NR No
IPC_494xxx_Series
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 CoC_RoHS10_0494004.NRHF REACH191_Declaration_0494004.NRHF No
Does not Contain IPC_494HF
0494005.NR PROTECTOR SLIM 0603 32V 5A RoHS No 12/31/2001 PbFree No CoC_RoHS10_0494005.NR REACH205_Declaration_0494005.NR No
Does not Contain IPC_494xxx_Series
0494005.NRHF PRTCTR SLIM HALOGEN FREE 0603 32V 5A RoHS No 12/31/2001 PbFree No CoC_RoHS10_0494005.NRHF REACH_SVHC Declaration (Contain)_0494005.NRHF No
Contains IPC_494HF
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 CoC_RoHS10_049401.5NR REACH211_Declaration_049401.5NR No
Does not Contain IPC_494xxx_Series
049401.5NRHF PRTCTR SLIM HALOGEN FREE 0603 32V 1.5A RoHS No 12/31/2001 PbFree No CoC_RoHS10_049401.5NRHF REACH191_Declaration_049401.5NRHF No
Does not Contain IPC_494HF
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 CoC_RoHS10_049402.5NR No
IPC_494xxx_Series
049402.5NRHF PRTCTR SLIM HALOGEN FREE 0603 32V 2.5A RoHS No 12/31/2001 PbFree No CoC_RoHS10_049402.5NRHF REACH209_Declaration_049402.5NRHF No
Does not Contain IPC_494HF
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 CoC_RoHS10_049403.5NR REACH197_Declaration_049403.5NR No
Does not Contain IPC_494xxx_Series
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
IPC_494HF
04941.25NR PROTECTOR SLIM 0603 32V 1.25A RoHS No 12/31/2001 PbFree No CoC_RoHS10_04941.25NR REACH_SVHC Declaration (Contain)_04941.25NR No
Contains IPC_494xxx_Series
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 CoC_RoHS10_04941.75NRHF REACH197_Declaration_04941.75NRHF No
Does not Contain IPC_494HF
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 CoC_RoHS10_04941.75NR REACH181_Declaration_04941.75NR No
Does not Contain IPC_494xxx_Series
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