© 2010 Littelfuse, Inc
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/LT.html for current information.
Items with S and SS at end of part number identify items with slit lead option. See Dimension Drawing and Part Ordering Number System sections of this document for more information.
I
I
V
I
P
R
hold
trip
max
max
d
min
Agency Approvals
AGENCY
Electrical Characteristics
Part Number
= Power dissipated from device when in the tripped state at 20°C still air.
= Trip current: minimum current at which the device will trip in 20°C still air.
= Hold current: maximum current device will pass without tripping in 20°C still air.
= Maximum fault current device can withstand without damage at rated voltage (V
24LT180SS
24LT100SS
= Maximum voltage device can withstand without damage at rated current (I max)
= Minimum resistance of device in initial (un-soldered) state.
15LT070S
24LT100S
24LT180S
24LT190S
15LT070
24LT100
24LT180
24LT190
24LT260
24LT300
24LT310
24LT340
LT Series
AGENCY FILE NUMBER
E183209
R50119583
I
(A)
0.7
0.7
2.6
3.0
3.1
3.4
1.0
1.0
1.0
1.8
1.8
1.8
1.9
1.9
hold
I
(A)
2.5
2.5
2.5
3.8
3.8
3.8
4.2
4.2
5.2
6.3
6.0
6.8
1.5
1.5
trip
(Vdc)
V
24
24
24
24
24
24
24
24
24
24
24
24
15
15
max
Axial Lead Battery Strap Type > LT Series
POLYFUSE
POLYFUSE
I
100
100
100
100
100
100
100
100
100
100
100
100
100
100
(A)
max
max.
(W)
2.0
2.0
2.0
2.3
2.0
2.5
2.7
P
1.0
1.0
1.5
1.5
1.5
1.9
1.9
d
Revised: June 4, 2010
max
)
®
®
Current
117
Maximum Time
10.00
10.00
3.50
3.50
5.00
5.00
5.00
9.00
9.00
9.00
13.0
15.0
16.0
Resettable PTCs
Resettable PTCs
17 .0
(A)
R
R
Caution: Operation beyond the specified rating may result in damage and possible arcing
and flame.
To Trip
typ
1max
Description
The new LT 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
• Weldable Nickel terminals
• Compact design saves
Applications
• Rechargeable battery cell
= Typical resistance of device in initial (un-soldered) state.
lead–free
board space
protection
- Mobile phones
- Laptop computers
= Maximum resistance of device at 20°C measured one hour after tripping or reflow
soldering of 260°C for 20 sec.
(Sec.)
Time
5.00
5.00
2.90
2.90
2.90
3.00
3.00
7 .00
7 .00
7 .00
5.0
4.0
5.0
5.0
0.100
0.100
0.070
0.070
0.070
0.040
0.040
0.040
0.030
0.030
0.025
0.018
0.015
0.016
R
(Ω)
min
Resistance
0.200
0.200
0.130
0.130
0.130
0.068
0.068
0.068
0.057
0.057
0.042
0.031
0.030
0.027
R
(Ω)
typ
• Low resistance
• Provides overcurrent
protection at 100°C
trip temperature
R
0.340
0.340
0.260
0.260
0.260
0.120
0.120
0.120
0.100
0.100
0.076
0.055
0.055
0.050
(Ω)
1max
Approvals
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Agency
LT Series
X
X
X
X
X
X
X
X
X
X
X
X
X
X