Polyfuse, Resettable ptcs, Radial leaded > 72r series – Littelfuse 72R Series User Manual
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Revised: July 12, 2010
POLYFUSE
®
Resettable PTCs
© 2010 Littelfuse, Inc.
72R Series
Radial Leaded > 72R Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/72R.html for current information.
Ambient Operation Temperature
-40°C
-20°C
0°C
23°C
40°C
50°C
60°C
70°C
85°C
Part Number
Hold Current (A)
72R020X
0.31
0.27
0.24
0.20
0.16
0.14
0.13
0.11
0.08
72R025X
0.39
0.34
0.30
0.25
0.20
0.18
0.16
0.14
0.10
72R030X
0.47
0.41
0.36
0.30
0.24
0.22
0.19
0.16
0.12
72R040X
0.62
0.54
0.48
0.40
0.32
0.29
0.25
0.22
0.16
72R050X
0.78
0.68
0.60
0.50
0.41
0.36
0.32
0.27
0.20
72R065X
1.01
0.88
0.77
0.65
0.53
0.47
0.41
0.35
0.26
72R075X
1.16
1.02
0.89
0.75
0.61
0.54
0.47
0.41
0.30
72R090X
1.40
1.22
1.07
0.90
0.73
0.65
0.57
0.49
0.36
72R110X
1.71
1.50
1.31
1.10
0.89
0.79
0.69
0.59
0.44
72R135X
2.09
1.84
1.61
1.35
1.09
0.97
0.85
0.73
0.54
72R160X
2.48
2.18
1.90
1.60
1.30
1.15
1.01
0.86
0.64
72R185X
2.87
2.52
2.20
1.85
1.50
1.33
1.17
1.00
0.74
72R250X
3.88
3.40
2.98
2.50
2.03
1.80
1.58
1.35
1.00
72R300X
4.65
4.08
3.57
3.00
2.43
2.16
1.89
1.62
1.20
72R375X
5.81
5.10
4.46
3.75
3.04
2.70
2.36
2.03
1.50
Average Time Current Curves
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.
-40
-30
-20
-10
0
10
20
30
40
50
60
70
80
10%
30%
50%
70%
90%
110%
130%
150%
170%
Temperature (°C)
Percentage of Rated Current
Temperature Rerating Curve
Temperature Rerating
0.20A 0.25A 0.30A 0.40A 0.50A 0.65A 0.75A 0.90A 1.10A 1.35A 1.60A 1.85A 2.50A 3.00A 3.75A
72R
0.01
0.1
1
10
100
0.1
1
10
100
Current in Amperes
Time in Seconds