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250R080 Datasheet(PDF) 1 Page - Littelfuse

Part No. 250R080
Description  Fast time - to - trip Access equipment Lan/Wan equipment
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Maker  LITTELFUSE [Littelfuse]
Homepage  http://www.littelfuse.com
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250R080 Datasheet(HTML) 1 Page - Littelfuse

   
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97
Revised: August 31, 2011
POLY-FUSE® Resettable PTCs
© 2011 Littelfuse, Inc
250R Series
Radial Leaded > 250R Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/250R.html for current information.
The 250R Series is designed to protect against short
duration high voltage fault currents (power cross or power
induction surge) typically found in telecom applications
(250Vrms). The series can be used to help telecom
networking equipment meet the protection requirements
specified in ITU K.20 and K.21.
Electrical Characteristics
Part Number
I
hold
(A)
I
trip
(A)
V
max
V
int / Vop
I
max
(A)
P
d
typ.
(W)
MaximumTime
ToTrip
Resistance
Agency
Approvals
Current
(A)
Time
(Sec.)
R
min
(Ω)
R
typ
(Ω)
R
1max
(Ω)
250R080
0.08
0.16
250/60
3
1
0.35
3
14
22
33
XX
250R080T
0.08
0.16
250/60
3
1
0.35
3
15
22
33
XX
250R120
0.12
0.24
250/60
3
1
1
1.5
4
8
16
XX
250R120-RA
0.12
0.24
250/60
3
1
1
1.0
7
9
16
XX
250R120-RC
0.12
0.24
250/60
3
1
1
0.85
5.4
7.5
14
XX
250R120-RF
0.12
0.24
250/60
3
1
1
0.7
6
10.5
16
XX
250R120-R1
0.12
0.24
250/60
3
1
1
0.8
6
9
16
XX
250R120-R2
0.12
0.24
250/60
3
1
1
0.7
8
10.5
16
XX
250R120-R3
0.12
0.24
250/60
3
1
1
1
8
10
16
XX
250R120T
0.12
0.24
250/60
3
1
1
1.2
7
12
16
XX
250R145
0.145
0.29
250/60
3
1
1
2.5
3
6
14
XX
250R145-RA
0.145
0.29
250/60
3
1
1
5
3
5.5
12
XX
250R145-RB
0.145
0.29
250/60
3
1
1
2.5
4.5
6
14
XX
250R145T
0.145
0.29
250/60
3
1
1
2.0
5.4
7.5
14
XX
250R180
0.18
0.65
250/60
10
1.8
1
21
0.8
2.2
4
XX
250R180T
0.18
0.65
250/60
10
1.8
1
20
1.4
3.9
4.5
XX
Items with T at end of part number = pre-tripped device. See Part Ordering Number System section of this data sheet for additional information.
Description
Features
Applications
range, 60VDC operating
voltage
resistance ranges available
Equipment (CPE)
telecom centers
250R Series
Agency Approvals
AGENCY
AGENCY FILE NUMBER
E183209
R50120008
I
hold
I
trip
V
int
V
op= The device regular operation voltage
I
)
P
d
R
min = Minimum resistance of device in initial (un-soldered) state.
R
typ = Typical resistance of device in initial (un-soldered) state.
R
Caution: Operation beyond the specified rating may result in damage and possible arcing
and flame.


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