POLYFUSE
®
Resettable PTCs
Surface Mount > Lo Rho Series
Lo Rho Surface Mount Series
Description
The Littelfuse Lo Rho Surface Mount PPTC (polymer
positive temperature coefficient) series offers ultra low
normal operating resistance while maintains the same
performance of existing Littelfuse PPTC products.
Available in 5 hold current ratings, all devices are TUV
and UL certified and possess a maximum fault current
rating of 40A.
Features
• Lo Rho (low resistance
at normal operating hold
current)
• RoHS compliant, Lead
Free and Halogen Free
• Fast response to fault
currents
Applications
• USB peripherals
• Disk drives
• CD-ROMs
• Plug and play protection
for motherboards and
peripherals
• PDAs / digital cameras
• Game console port
protection
• Compact design saves
board space
• Thin-profile <0.75mm
• Compatible with high
temperature solders
Agency Approvals
AGENCY
AGENCY FILE NUMBER
E183209
R50119118
Electrical Characteristics
Maximum Time
To Trip
Current
(A)
8.00
8.00
8.00
8.00
8.00
17
.50
9.50
Time
(Sec.)
0.20
0.30
0.30
0.30
3.00
2.00
4.50
Resistance
R
min
(Ω)
0.040
0.030
0.015
0.010
0.005
0.003
0.003
R
1max
(Ω)
0.160
0.130
0.100
0.065
0.024
0.018
0.025
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Part Number
Marking
I
hold
(A)
0,75
1.10
1.10
1.50
2.00
3.50
1.90
I
trip
(A)
1.50
1.80
2.20
3.00
4.00
7
.00
4.90
V
max
(Vdc)
6
6
6
6
6
6
6
I
max
(A)
50
50
50
50
50
50
50
P
d
max.
(W)
0.6
0.6
0.8
0.8
0.8
0.8
1.0
Agency
Approvals
0805L075SLYR
0805L110SLYR
1206L110SLYR
1206L150SLYR
1210L200SLYR
1210L350SL-SYR
1812L190SLPR
-G
-H
-H
-K
-L
-T
LF 19
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.
© 2010 Littelfuse, Inc
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/LoRho.html for current information.
9
Revised: June 4, 2010
Lo Rho Series
Lo Rho Series
LITTELFUSE [ LITTELFUSE ]
