POLYFUSE
廬
Resettable PTCs
Axial Leaded Strap
LT Series
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
鈥?RoHS compliant and
lead-free
鈥?Weldable nickel terminals
鈥?Compact design saves
board space
Applications
鈥?Rechargeable battery cell
protection
- Mobile phones
- Laptop computers
鈥?Low resistance
鈥?Provides overcurrent
protection at 100擄C
trip temperature
Agency Approvals
AGENCY
AGENCY FILE NUMBER
E183209
R50082521
Electrical Characteristics
I
hold
(A)
0.7
0.7
1.0
1.0
1.0
1.8
1.8
1.8
1.9
1.9
2.6
3.0
3.1
3.4
I
trip
(A)
1.5
1.5
2.5
2.5
2.5
3.8
3.8
3.8
4.2
4.2
5.2
6.3
6.0
6.8
V
max
(Vdc)
15
15
24
24
24
24
24
24
24
24
24
24
24
24
I
max
(A)
100
100
100
100
100
100
100
100
100
100
100
100
100
100
P
d
max.
(W)
1.0
1.0
1.5
1.5
1.5
2.0
2.0
2.0
1.9
1.9
2.3
2.0
2.5
2.7
Maximum Time
To Trip
Current
(A)
3.50
3.50
5.00
5.00
5.00
9.00
9.00
9.00
10.00
10.00
13.0
15.0
16.0
17.0
Time
(Sec.)
5.00
5.00
7.00
7.00
7.00
2.90
2.90
2.90
3.00
3.00
5.0
4.0
5.0
5.0
R
min
(惟)
0.100
0.100
0.070
0.070
0.070
0.040
0.040
0.040
0.030
0.030
0.025
0.015
0.018
0.016
Resistance
R
typ
(惟)
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
1max
(惟)
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
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Agency
Approvals
Part Number
15LT070
15LT070S
24LT100
24LT100S
24LT100SS
24LT180
24LT180S
24LT180SS
24LT190
24LT190S
24LT260
24LT300
24LT310
24LT340
I
hold
= Hold current: maximum current device will pass without tripping in 20擄C still air.
I
trip
= Trip current: minimum current at which the device will trip in 20擄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擄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擄C measured one hour after tripping or reflow
soldering of 260擄C for 20 sec.
Caution:
Operation beyond the specified rating may result in damage and possible arcing
and flame.
LT Series
Specifications are subject to change without notice.
Electronics Designers Guide
www.littelfuse.com
漏2006 Littelfuse
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