Littelfuse LR Series User Manual
Polyfuse, Resettable ptcs, Lr series
113
Revised: June 4, 2010
POLYFUSE
®
Resettable PTCs
© 2010 Littelfuse, Inc
POLYFUSE
®
Resettable PTCs
LR Series
Axial Lead Battery Strap Type > LR Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/LR.html for current information.
LR S
eries
LR Series
The new LR Series device provides reliable, noncycling
protection against overcharging and short circuits events
for rechargeable battery cells where resettable protection
is desired.
Agency Approvals
Electrical Characteristics
Part Number
I
hold
(A)
I
trip
(A)
V
max
(Vdc)
I
max
(A)
P
d
max.
(W)
Maximum Time
To Trip
Resistance
Agency
Approvals
Current
(A)
Time
(Sec.)
R
min
(Ω)
R
typ
(Ω)
R
1max
(Ω)
15LR190
1.9
3.9
15
100
1.2
9.50
5.00
0.039
0.072
0.102
X
X
15LR190S
1.9
3.9
15
100
1.2
9.50
5.00
0.039
0.072
0.102
X
X
15LR260
2.6
5.8
15
100
2.5
13.00
5.00
0.020
0.042
0.063
X
X
15LR260S
2.6
5.8
15
100
2.5
13.00
5.00
0.020
0.042
0.063
X
X
15LR380
3.8
8.3
15
100
2.5
19.00
5.00
0.013
0.026
0.037
X
X
20LR450
4.5
8.9
20
100
2.5
22.50
5.00
0.011
0.020
0.028
X
X
20LR550
5.5
10.5
20
100
2.8
27.50
5.00
0.009
0.016
0.022
X
X
20LR600
6.0
11.7
20
100
2.8
30.00
5.00
0.007
0.014
0.019
X
X
20LR730
7.3
14.1
20
100
3.3
30.00
5.00
0.006
0.012
0.015
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
typ
= Typical 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.
Description
Features
Applications
• RoHS compliant and
lead–free
• Weldable Nickel terminals
• Slim, low profile design
• Compact design saves
board space
• Low resistance
• Fast trip time
• Rechargeable battery cell
protection
• Portable Computers
• Camcorders
AGENCY
AGENCY FILE NUMBER
E183209
R50119583