For most of our products there is a 2:1 relationship between IT and IH. For some products this can be as low as 1.7:1 and for others as great as 3:1. The material and manufacturing variances in resistance as well as the change of resistance after a trip event or high temperature installation will determine the ratio of IT to IH. For most of our products this makes the 2:1 ratio the most practical value.
Example- JK60 Series Electrical Characteristic
| Model |
IHold(A) |
ITrip (A) |
Vmax |
Imax |
Pd max |
Maximum Time to Trip |
Nominal resistance（Ω） |
| V（DC） |
A（DC） |
W |
Current（A） |
Time（S） |
Rmin |
Rmax |
| JK60-005 |
0.05 |
0.15 |
60 |
40 |
0.26 |
0.25 |
8.0 |
7.3 |
20 |
| JK60-010 |
0.10 |
0.3 |
60 |
40 |
0.38 |
0.5 |
5.0 |
2.5 |
7.5 |
| JK60-017 |
0.17 |
0.34 |
60 |
40 |
0.48 |
0.85 |
5.0 |
2 |
5.21 |
| JK60-020 |
0.2 |
0.4 |
60 |
40 |
0.41 |
1.0 |
5.0 |
1.5 |
2.84 |
| JK60-025 |
0.25 |
0.5 |
60 |
40 |
0.45 |
1.25 |
5.0 |
1.0 |
1.95 |
| JK60-030 |
0.30 |
0.6 |
60 |
40 |
0.49 |
1.5 |
5.0 |
0.76 |
1.38 |
| JK60-040 |
0.40 |
0.8 |
60 |
40 |
0.56 |
2.0 |
5.0 |
0.45 |
0.88 |
| JK60-050 |
0.50 |
1.0 |
60 |
40 |
0.77 |
2.5 |
5.0 |
0.40 |
0.79 |
| JK60-065 |
0.65 |
1.3 |
60 |
40 |
0.88 |
3.25 |
5.0 |
0.31 |
0.50 |
| JK60-075 |
0.75 |
1.5 |
60 |
40 |
0.92 |
3.75 |
5.0 |
0.25 |
0.42 |
| JK60-090 |
0.90 |
1.8 |
60 |
40 |
0.99 |
4.5 |
5.0 |
0.20 |
0.33 |
| JK60-110 |
1.10 |
2.2 |
60 |
40 |
1.5 |
5.5 |
8.0 |
0.15 |
0.27 |
| JK60-135 |
1.35 |
2.7 |
60 |
40 |
1.7 |
6.75 |
8.0 |
0.12 |
0.21 |
| JK60-160 |
1.60 |
3.2 |
60 |
40 |
1.9 |
8.0 |
8.0 |
0.09 |
0.16 |
| JK60-185 |
1.85 |
3.7 |
60 |
40 |
2.1 |
9.25 |
8.0 |
0.08 |
0.14 |
| JK60-200 |
2.00 |
4.0 |
60 |
40 |
2.3 |
10.0 |
8.0 |
0.07 |
0.14 |
| JK60-250 |
2.50 |
5.0 |
60 |
40 |
2.5 |
12.5 |
8.0 |
0.05 |
0.10 |
| JK60-300 |
3.00 |
6.0 |
60 |
40 |
2.8 |
15.0 |
8.0 |
0.04 |
0.08 |
| JK60-375 |
3.75 |
7.5 |
60 |
40 |
3.2 |
18.75 |
24.0 |
0.03 |
0.06 |
| JK60-500 |
5.00 |
10 |
60 |
40 |
3.5 |
25.0 |
24.0 |
0.02 |
0.06 |
IH=Holdcurrent:maximum current at which the device will not trip at 25℃ still air.
IT=Tripcurrent:minimum current at which the device will nalways at 25℃ still air.
Vmax=Maximum voltagedevice can withstand without damage at rated current.
Imax=Maximum faultcurrent device can withstand tithout damage at rated voltage.
Ttrip=Maximum time totrip(s) at assigned current.
Pd=Typical powerdissipation:typical amount of power dissipated by the decice when in state airenvironment.
Rmin=Minimum deviceresistance at 25℃ prior to tripping.
Rmax=Maximum deviceresistance at 25℃ prior to tripping.
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