Product Description
JK250 Series of Polymer PTC Resettable Fuse Used for Communication Equipment
Jk250 series of resettable fuse is a kind of overcurrent protection unit which specially designed and manufactured for the communication exchanger and distributing frame. Has passed the repeated selective examination by the product protectionTesting Centre of the Ministry of Information Industry (the former Ministry of Posts and Telecommunications) and the Bureau of Technical Supervision, this series’ product performance completely conform to the standards of the telecommunications and posts industry.
|
Electrical characteristics(25℃)
|
Model/PDF
|
Vmax
(V) |
Imax
(A) |
Ih
(mA) |
Rmax
(Ω) |
Rmin
(Ω) |
Fig. |
Maximum Contour Size
（mm） |
|
A
|
B
|
C
|
D
|
|
|
250
|
3
|
60
|
40.0
|
26.0
|
3
|
6.0
|
9.3
|
3.8
|
5.1
|
|
|
250
|
3
|
80
|
22.0
|
14.0
|
3
|
6.0
|
9.3
|
3.8
|
5.1
|
|
|
250
|
3
|
90
|
20.0
|
10.0
|
3
|
6.0
|
9.3
|
3.8
|
5.1
|
|
|
250
|
3
|
110
|
12.0
|
6.0
|
4
|
6.5
|
10.0
|
3.8
|
5.1
|
|
|
250
|
3
|
120
|
10.0
|
5.0
|
1
|
5.5
|
5.5
|
2.6
|
---
|
|
|
250
|
3
|
120
|
10.0
|
6.0
|
4
|
7.0
|
10.0
|
3.8
|
5.1
|
|
|
250
|
3
|
145
|
6.5
|
3.5
|
4
|
7.0
|
10.0
|
3.8
|
5.1
|
|
|
250
|
10
|
180
|
2.2
|
1.0
|
3
|
10.2
|
14.5
|
3.4
|
5.1
|
|
|
250
|
10
|
180
|
3.0
|
1.0
|
4
|
10.4
|
14.5
|
3.8
|
5.1
|
|
|
250
|
10
|
200
|
6.0
|
3.0
|
2
|
10.5
|
17.0
|
3.8
|
5.1
|
|
|
250
|
10
|
400
|
3.0
|
1.0
|
2
|
10.5
|
17.0
|
3.8
|
5.1
|
|
|
250
|
10
|
600
|
2.0
|
0.6
|
2
|
16.0
|
18.0
|
4.5
|
5.1
|
|
|
250
|
10
|
800
|
1.0
|
0.4
|
2
|
20.0
|
22.0
|
4.5
|
5.1
|
|
|
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