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www.littelfuse.com
2006 Littelfuse
LT Series
Specifications are subject to change without notice.
Electronics Designers Guide
POLYFUSE
Resettable PTCs
Axial Leaded Strap
Environmental Specifications
Operating/Storage
Temperature
-40°C to +85°C
Maximum Device Surface
Temperature in Tripped State
125°C
Passive Aging
+70°C, 1000 hours
±10% typical resistance change
Humidity Aging
+85°C, 85%R.H. 7days
±5% typical resistance change
Vibration
MIL-LTD-883C, Condition A
No change
Physical Specifications
Terminal Material
0.13mm nominal thickness, quarter-hard
nickel
Insulating Material
Polyester tape
Dimensions
E
B
D1
D2
C
A
SLIT
E
B
D1
D2
C
A
NOMINAL
0.5 x 4.0
(.02”x .15”)
E
B
D1
D2
C
A
Figure 1
Figure 2
Figure 3
SLIT
NOMINAL
0.5 x 4.0
(.02”x .15”)
Lot Number
1
1
0.16
1
0.16
1
0.16
1
0.20
1
0.20
1
0.20
1.1
0.25
1
0.20
1
0.20
Marking
Marking
Marking
Product Series
1.2
1.2
1
1
Current Rating
0.16
0.16
Littelfuse
4.9
4.9
4.9
4.9
4.9
Part
Number
A
B
C
D1
D2
E
Fig.
Inches
Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Min. Min. Min. Min Max. Min. Max.
0.78 0.87 19.9 22.1 0.19 0.20
4.9
5.2
0.03 0.05
0.78 0.87 19.9 22.1 0.19 0.20
4.9
5.2
0.03 0.05
0.82 0.91 20.9 23.1 0.19 0.20
4.9
5.2
0.02 0.04
0.82 0.91 20.9 23.1 0.19 0.20
5.2
0.02 0.04
0.82 0.91 20.9 23.1 0.19 0.20
5.2
0.02 0.04
0.94 1.02
24
26
0.19 0.20
5.2
0.02 0.04
0.94 1.02
24
26
0.19 0.20
5.2
0.02 0.04
0.94 1.02
24
26
0.19 0.20
5.2
0.02 0.04
0.84 0.92 21.3 23.4 0.40 0.43 10.2
11
0.02 0.04
0.84 0.92 21.3 23.4 0.40 0.43 10.2
11
0.02 0.04
0.94 1.02
24
26
0.43 0.47 10.8 11.9 0.02 0.04
1.12 1.25 28.4 31.8 0.51 0.53
13
13.5 0.02 0.04
0.94 1.02
24
26
0.58 0.63 14.8 15.9 0.02 0.04
0.94 1.02
24
26
0.58 0.63 14.8 15.9 0.02 0.04
mm
Inches
mm
Inches
mm
in.
mm
in.
mm
Inches
mm
15LT070
15LT070S
24LT100
24LT100S
24LT100SS
24LT180
24LT180S
24LT180SS
24LT190
24LT190S
24LT260
24LT300
24LT310
24LT340
0.7
0.7
0.6
0.6
0.6
0.6
0.6
0.6
0.5
0.5
0.6
0.5
0.6
0.6
0.22
5.5
4.1
4.1
4.1
4.1
4.1
5
5
5
6.3
5
5
0.22
0.22
0.16
0.16
0.16
0.16
0.16
0.16
0.20
0.20
0.20
0.25
0.20
0.20
5.5
5.5
4.1
4.1
4.1
4.1
4.1
4.1
5
5
5
6.3
5
5
0.01 0.22
0.01 0.22
0.01 0.16
0.01 0.16
0.01 0.16
0.01 0.16
0.01 0.16
0.01 0.16
0.01 0.20
0.01 0.20
0.01 0.20
0.00 0.25
0.01 0.20
0.01 0.20
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
4.8
4.8
5.9
6
5.9
5.9
4.1
4.1
4.1
4.1
4.1
4.1
4.1
4.1
5.4
5.4
6.1
6.6
6.1
6.1
1
2
1
2
3
1
2
3
1
2
1
1
1
1