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Home » NEWEST Products » New by Manufacturer » Littelfuse » Littelfuse Lo Rho Polyfuse PPTC Resettable PTC Fuses
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Home » Product Knowledge Center » Littelfuse Lo Rho Polyfuse PPTC Resettable PTC Fuses
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Littelfuse Lo Rho Polyfuse
PPTC Resettable PTC Fuses

Littelfuse Lo Rho Surface Mount Polyfuse PPTC (Polymer Positive Temperature Coefficient) Resettable PTC Fuses provide ultra-low resistance at normal operating hold current. Featuring a compact design, Lo Rho Polyfuse PPTC Resettable PTC Fuses offer fast response times to fault currents with a maximum fault current rating of 40A. The Lo Rho fuses are compatible with high temperature solders and are available in a range of hold current ratings.

New! Littelfuse has expanded its line of Lo Rho Polyfuse PPTC Resettable PTC Fuses to provide compact designs as small as 0603 with thicknesses as low as 0.4mm.
View the 0603LxxxSLYR Lo Rho Polyfuse PPTC Resettable PTC Fuses
Littelfuse 0603L SL Series Device Specifications

Features
  • Lo Rho (low resistance at normal operating hold current)
  • Fast response to fault currents
  • Automatically resettable
  • Compact design saves board space
  • RoHS compliant, Lead-free, Halogen-free, TUV & UL certified
  • Compatible with high temperature solders
Applications
  • USB peripherals
  • Disk drives
  • CD-ROMs
  • PDAs
  • Digital cameras
  • Plug and play protection for motherboards and peripherals
  • Game console port protection
Part Number
Marking
I hold (A)
I trip (A)
V max (Vdc)
I max
(A)
P d typ.
(W)
Maximum Time-To-Trip
Resistance
Agency Approvals
Current
(A) 		Time
(Sec.) 		R min
(Ω) 		R 1max
(Ω) 		UL
TUV
0805L075SLYR
 -G 0.75 1.50 6
50 0.6 8.00 0.20 0.040 0.160 x x
1206L150SLYR
 -K 1.50 3.00 6 50 0.8 8.00 0.30 0.010 0.065 x x
1206L300SLWR -N 3.00 6.00 6 50 0.8 8.00 4.00 0.003 0.020 x x
1206L350SLWR -T 3.50 7.00 6 50 0.8 8.00 5.00 0.003 0.018 x x
1206L380SLWR X 3.80 8.00 6 50 0.8 8.00 5.00 0.002 0.016 x x
1210L200SLYR
 -L 2.00 4.00 6 50 0.8 8.00 3.00 0.005 0.024 x x
1210L350SLWR -T 3.50 7.00 6 50 0.8 17.5 2.00 0.003 0.018 x x
1210L380SLYR X 3.80 8.00 6 50 1.0 8.00 5.00 0.002 0.016 x x
1812L190SLPR LF 19
1.90 4.90 6 50 1.0 9.50 4.50 0.003
0.025 x x
1812L350SLPR* LF-35 3.50 8.10 6 50 1.0 17.5* 2.00* 0.003 0.025** x x
0603L050SLYR K
 0.50 1.00 6  50 0.6 8.00 0.10 0.070 0.350 x x
0603L150SLYR T
 1.50 3.00 6  50 0.6 8.00 0.50 0.007 0.080 x x
0603L100SLYR S
 1.00 1.80 6  50 0.6 8.00 0.30 0.040 0.210 x x
0603L075SLYR N
 0.75 1.50 6  50 0.6 8.00 0.20 0.050 0.250 x x

I hold =
Hold current: maximum current device will pass without tripping in 20°C still air.
I trip =
Trip current: minimum current at which the device will trip in 20°C still air.
V max =
Maximum voltage device can withstand without damage at rated current (I max )
I max =
Maximum fault current device can withstand without damage at rated voltage (V max )
P d = Power dissipated from device when in the tripped state at 20°C still air.
R min =
Minimum resistance of device in initial (un-soldered) state.
R 1max =
Maximum resistance of device at 20°C measured one hour after tripping or reflow soldering of 260°C for 20 sec.
Caution:
Operation beyond the specified rating may result in damage and possible arcing and flame.
Notes :
*1812L350 Typical Time-to-Trip is 50A at 0.013-0.020 seconds and meets the 8A at 5 seconds maximum Time-to-Trip requirement.
**1812L350 R1min=0.015ohm (resistance range 0.015-0.025ohm).

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  • Circuit Protection