POLYFUSE
®
Resettable PTCs
Axial Lead Battery Strap Type > LR Series
LR Series
Description
The new LR Series device provides reliable, noncycling
protection against overcharging and short circuits events
for rechargeable battery cells where resettable protection
is desired.
Features
• RoHS compliant and
lead–free
• Weldable Nickel terminals
• Slim, low profile design
Agency Approvals
AGENCY
AGENCY FILE NUMBER
E183209
R50119583
• Compact design saves
board space
• Low resistance
• Fast trip time
Applications
• Rechargeable battery cell
protection
• Portable Computers
• Camcorders
Electrical Characteristics
Maximum Time
To Trip
Current
(A)
9.50
9.50
13.00
13.00
19.00
22.50
27
.50
30.00
30.00
Time
(Sec.)
5.00
5.00
5.00
5.00
5.00
5.00
5.00
5.00
5.00
R
min
(Ω)
0.039
0.039
0.020
0.020
0.013
0.011
0.009
0.007
0.006
Resistance
R
typ
(Ω)
0.072
0.072
0.042
0.042
0.026
0.020
0.016
0.014
0.012
R
1max
(Ω)
0.102
0.102
0.063
0.063
0.037
0.028
0.022
0.019
0.015
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Part Number
I
hold
(A)
1.9
1.9
2.6
2.6
3.8
4.5
5.5
6.0
7
.3
I
trip
(A)
3.9
3.9
5.8
5.8
8.3
8.9
10.5
11.7
14.1
V
max
(Vdc)
15
15
15
15
15
20
20
20
20
I
max
(A)
100
100
100
100
100
100
100
100
100
P
d
max.
(W)
1.2
1.2
2.5
2.5
2.5
2.5
2.8
2.8
3.3
Agency
Approvals
15LR190
15LR190S
15LR260
15LR260S
15LR380
20LR450
20LR550
20LR600
20LR730
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.
© 2010 Littelfuse, Inc
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/LR.html for current information.
113
LR Series
Revised: June 4, 2010
LR Series
POLYFUSE
®
Resettable PTCs
Axial Lead Battery Strap Type > LR Series
Temperature Rerating
Ambient Operation Temperature
-40°C
Part Number
15LR190
15LR190S
15LR260
15LR260S
15LR380
20LR450
20LR550
20LR600
20LR730
2.80
2.80
3.80
3.80
5.50
6.50
8.00
8.70
10.60
2.50
2.50
3.40
3.40
4.90
5.80
7
.10
7
.80
9.50
2.30
2.30
3.10
3.10
4.40
5.30
6.20
7
.10
8.60
1.90
1.90
2.60
2.60
3.80
4.50
5.50
6.00
7
.30
-20°C
0°C
23°C
40°C
Hold Current (A)
1.60
1.60
2.20
2.20
3.30
3.90
4.70
5.20
6.30
1.50
1.50
2.00
2.00
3.00
3.60
4.30
4.70
5.70
1.40
1.40
1.90
1.90
2.80
3.30
4.00
4.40
5.40
1.20
1.20
1.70
1.70
2.50
2.90
3.60
3.90
4.70
1.00
1.00
1.40
1.40
2.10
2.50
3.00
3.30
4.00
50°C
60°C
70°C
85°C
Average Time Current Curves
Temperature Rerating Curve
1.90 A
2.60 A
3.80 A
4.50 A
5.50 A
6.00 A
7.30 A
170%
150% B
Percentage of Rated Current
10
LR
130%
110%
90%
70%
50%
30%
10%
A
Line/Part Number:
A
15LR190 • 15LR260
15LR190
S
• 15LR260
S
15LR260 • 15LR450
A
B
B
15LR380
15LR550
15LR600
20LR730
Time in Seconds
1
-40 -30 -20
-10
0
10
20 30
40
Temperature (°C)
50
60
70
80
0.1
0.01
1
10
100
1000
Current in Amperes
The average time current curves and Temperature Rerating curve performance is affected
by a number or variables, and these curves provided as guidance only. Customer must
verify the performance in their application.
114
LR Series
Revised: June 4, 2010
© 2010 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/LR.html for current information.
POLYFUSE
®
Resettable PTCs
Axial Lead Battery Strap Type > LR Series
Physical Specifications
0.13mm nominal thickness, quarter-hard
Nickel
Polyester tape
Environmental Specifications
Operating/Storage
Temperature
Maximum Device Surface
Temperature in Tripped State
Passive Aging
Terminal Material
-40°C to +85°C
Insulating Material
125°C
+70°C, 1000 hours
-/+10% typical resistance change
+85°C, 85% R.H., 7 days
-/+5% typical resistance
change
MIL–STD–883C, Method
2007 Condition A, No change
.1,
Humidity Aging
Vibration
Dimensions
Figure 1
SLIT
A
Figure 2
(Items with S at end of part number)
0.5 x 4.0 NOMINAL
(.02”x .15”)
A
B
E
B
E
D1
D2
C
D1
D2
C
A
Part
Number
15LR190
15LR190S
15LR260
15LR260S
15LR380
20LR450
20LR550
20LR600
20LR730
Figure
Inches
mm
Inches
B
mm
Inches
C
mm
D1
D2
Inches
E
mm
Max.
4.10
4.10
4.10
4.10
5.10
6.10
Inches mm Inches mm
Min.
0.22
0.22
0.16
0.16
0.16
0.21
0.21
0.16
0.16
Min.
5.50
5.50
4.10
4.10
4.10
5.30
5.30
4.10
4.10
Min.
0.22
0.22
0.16
0.16
0.16
0.21
0.21
0.16
0.16
Min.
5.50
5.50
4.10
4.10
4.10
5.30
5.30
4.10
4.10
Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max.
1
2
1
2
1
1
1
1
1
0.78
0.78
0.82
0.82
0.94
0.94
1.38
0.94
1.07
0.87 19.90 22.10 0.19
0.87 19.90 22.10 0.19
0.91 20.90 23.10 0.19
0.91 20.90 23.10 0.19
1.02 24.00 26.00 0.27
1.02 24.00 26.00 0.39
1.46 35.00 37
.00 0.27
1.02 24.00 26.00 0.55
1.15
27
.10 29.10 0.55
0.22
0.22
0.22
0.22
0.30
0.41
0.30
4.90
4.90
4.90
4.90
6.90
5.50
5.50
5.50
5.50
7
.50
0.02
0.02
0.02
0.02
0.02
0.04
0.04
0.04
0.04
0.04
0.04
0.04
0.04
0.04
0.60
0.60
0.60
0.60
0.60
0.60
0.60
0.60
0.60
1.00
1.00
1.00
1.00
1.00
1.00
1.00
1.00
1.00
Min Max. Min.
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.22
0.22
0.16
0.16
0.16
0.21
0.21
0.16
0.16
3.90
3.90
3.90
3.90
4.90
5.90
4.90
5.90
5.90
9.90 10.50 0.02
6.90
7
.50
0.02
0.57 13.90 14.50 0.02
0.57 13.90 14.50 0.02
6.10
6.10
Part Marking System
Top Side
Product Series
190S
XX9R
Littelfuse
Trademark
LR
Current Rating
Lot Number
(Contact Littelfuse
for additional
information)
© 2010 Littelfuse, Inc
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/LR.html for current information.
115
LR Series
Revised: June 4, 2010
LR Series
5.10
POLYFUSE
®
Resettable PTCs
Axial Lead Battery Strap Type > LR Series
Part Ordering Number System
15 LR 190 S U
QUANTITY CODE
U:
500
(bulk)
LEAD OPTIONS:
Blank = standard
S = slit lead
HOLD CURRENT (VALUE DIVIDED BY 100 = HOLD CURRENT IN AMPS)
SERIES
Voltage Rating (VDC)
Packaging
Part Number
15LR190
15LR190S
15LR260
15LR260S
15LR380
20LR450
20LR550
20LR600
20LR730
Ordering
Number
15LR190U
15LR190SU
15LR260U
15LR260SU
15LR380U
20LR450U
20LR550U
20LR600U
20LR730U
I
hold
(A)
1.9
1.9
2.6
2.6
3.8
4.5
5.5
6.0
7
.3
I
hold
Code
190
190
260
260
380
450
550
600
730
Packaging
Option
Bulk
Bulk
Bulk
Bulk
Bulk
Bulk
Bulk
Bulk
Bulk
Quantity
500
500
500
500
500
500
500
500
500
Quantity &
Packaging Codes
U
U
U
U
U
U
U
U
U
116
LR Series
Revised: June 4, 2010
© 2010 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/LR.html for current information.
京公网安备 11010802033920号
EEWORLD
