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PDF 250R Data sheet ( Hoja de datos )

Número de pieza 250R
Descripción POLYFUSE Resettable PTCs Radial Leaded
Fabricantes Littelfuse　
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POLYFUSE® Resettable PTCs
Radial Leaded
250R Series
Description
• 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.
Agency Approvals
AGENCY AGENCY FILE NUMBER
E183209
R50082521
Features
• RoHS compliant and
lead-free
• Fast time-to-trip
• Binned and sorted narrow
resistance ranges available
• 0.08 – 0.18 Hold current
range, 60VDC operating
voltage
• 250VAC interrupt rating
Applications
• Customer Premises
Equipment (CPE)
• Central Office (CO)/
Telecom Centers
• LAN/WAN Equipment
• Access equipment
Electrical Characteristics
www.DataSheet4U.com
Part Number
I hold
(A)
I trip
Vmax
I max
(A) Vint / Vop (A)
250R080T
250R080
250R120
250R120-RA
250R120-RC
250R120-RF
250R120-R1
250R120-R2
250R120-R3
250R120T
250R145
250R145-RA
250R145-RB
250R145T
250R180
250R180T
0.08 0.16 250/60
0.08 0.16 250/60
0.12 0.24 250/60
0.12 0.24 250/60
0.12 0.24 250/60
0.12 0.24 250/60
0.12 0.24 250/60
0.12 0.24 250/60
0.12 0.24 250/60
0.12 0.24 250/60
0.145 0.29 250/60
0.145 0.29 250/60
0.145 0.29 250/60
0.145 0.29 250/60
0.18 0.65 250/60
0.18 0.65 250/60
*typical value
C: coated device
T: pre-tripped device
3
3
3
3
3
3
3
3
3
3
3
3
3
3
10
10
mPadx.
(W)
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1.8
1.8
Maximum Time
To Trip
Current Time
(A) (Sec.)
0.35 3
0.35 3
1 1.5
1 1.0
1 0.85
1 0.7
1 0.8
1 0.7
11
1 1.2
1 2.5
15
1 2.5
1 2.0
1 21
1 20
Resistance
R min
(Ω)
15
14
4
7
5.4
6
6
8
8
7
3
3
4.5
5.4
0.8
1.4
R typ
(Ω)
22
22
8
9
7.5
10.5
9
10.5
10
12
6
5.5
6
7.5
2.2
3.9
R 1max
(Ω)
33
33
16
16
14
16
16
16
16
16
14
12
14
14
4
4.5
Agency
Approvals
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
250R Series
Specifications are subject to change without notice.

Electronics Designers Guide
www.littelfuse.com
©2006 Littelfuse

1 page




250R pdf
POLYFUSE® Resettable PTCs
Radial Leaded
Dimensions
Figure 1
AC
Figure 2
AC
Marking
B
Marking
B
D
EF
Figure 1
D
E
Figure 2
F
A
Part Number IncheFsigurme m1
250R080
A Max. MaxC.
0.23 5.8
250R080T
0.23 5.8
250R120
0.26
250R120-RAMarkin0g.26
6.5
6.5
250R120-RC 0.26 6.5
250R120-RF 0.26 6.5
250R120-R1 0.26 6.5
250RD120-R2 0.26 6.5
250R120-R3 0.26 6.5
250R120T E 0.26 6.5
250R145
0.26 6.5
250R145-RA 0.26 6.5
250R145-RB 0.26 6.5
250R145T
0.26 6.5
250R180
0.37 9.5
250F180T
0.37 9.5
B
Inches mm
Max. Max.
0.39 9.9
0.39Littelfuse
Trademark
0.43
2950.9
080
11XXXX
0.43B
0.43
11
11
0.43 11
0.43 11
0.43 11
0.43
F0.43
11
11
0.43 11
0.43 11
0.43 11
0.43 11
0.47 12
0.47 12
CDE
Inches mm Inches Figmurme 2 Inches mm
Max. MaxA. Min.
0.18 4.6 0.19
Min.
4.7
Typ. Typ.
0.20 C 5.1
0.18Voltage Rating
Current Rating
0.15Date Code
(Contact Littelfuse
for additional
information)
0.18
0.18
4.6
3.8
0.19Littelfuse
Trademark
0.19
4M.6arking 0.19
4.6 0.19
2450.7
120
X4XX.X7
4.7B
4.7
0.20Voltage Rating
Current Rating
0.20Date Code
(Contact Littelfuse
for additional
information)
0.20
5.1
5.1
5.1
0.20 5.1
0.18 4.6 0.19 4.7 0.20 5.1
0.18 4.6 0.19 4.7 0.20 5.1
0D.18 4.6 0.19 4.7 0.20 5.1
0.18 4.6 0.19 4.7 0.20 5.1
0.18 4.6E 0.19 4.7 0.20 5F.1
0.18 4.6 0.19 4.7 0.20 5.1
0.18 4.6 0.19 4.7 0.20 5.1
0.18 4.6 0.19 4.7 0.20 5.1
0.18 4.6 0.19 4.7 0.20 5.1
0.18 4.6 0.19 4.7 0.20 5.1
0.18 4.6 0.19 4.7 0.20 5.1
Physical Characteristics
Lead (dia)
Inches mm
Material
Figure
0.026 0.65 Sn/Cu
1
0.026 0.65 Sn/Cu
1
0.026 0.65 Sn/Cu
2
0.026 0.65 Sn/Cu
2
0.026 0.65 Sn/Cu
2
0.026 0.65 Sn/Cu
2
0.026 0.65 Sn/Cu
2
0.026 0.65 Sn/Cu
2
0.026 0.65 Sn/Cu
2
0.026 0.65 Sn/Cu
2
0.026 0.65 Sn/Cu
2
0.026 0.65 Sn/Cu
2
0.026 0.65 Sn/Cu
2
0.026 0.65 Sn/Cu
2
0.026 0.65 Sn/Cu
1
0.026 0.65 Sn/Cu
1
Part Marking System
Littelfuse
Trademark
250
080
XXXX
Voltage Rating
Current Rating
Date Code
(Contact Littelfuse
for additional
information)
Littelfuse
Trademark
250
120
XXXX
Voltage Rating
Current Rating
Date Code
(Contact Littelfuse
for additional
information)
250R Series
Specifications are subject to change without notice.

Electronics Designers Guide
www.littelfuse.com
©2006 Littelfuse

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