Radial Leaded. 250R Datasheet

250R Leaded. Datasheet pdf. Equivalent

250R Datasheet
Recommendation 250R Datasheet
Part 250R
Description POLYFUSE Resettable PTCs Radial Leaded
Feature 250R; POLYFUSE® Resettable PTCs Radial Leaded 250R Series Description • The 250R series is designed to p.
Manufacture Littelfuse
Datasheet
Download 250R Datasheet




Littelfuse 250R
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



Littelfuse 250R
POLYFUSE® Resettable PTCs
Radial Leaded
Temperature Rerating
Part Number
250R080
250R080T
250R120
250R120T
250R145
250R145T
250R180
250R180T
-40°C
0.12
0.12
0.18
0.18
0.26
0.26
0.28
0.28
-20°C
0.11
0.11
0.16
0.16
0.20
0.20
0.23
0.23
250R Series
Average Time Current Curves
100000
10000
1000
100
10
1
Ambient Operation Temperature
0°C
23°C
40°C
50°C
60°C
Hold Current (A)
0.09 0.08 0.06 0.05 0.05
0.09 0.08 0.06 0.05 0.05
0.14 0.12 0.10 0.09 0.08
0.14 0.12 0.10 0.09 0.08
0.17 0.145 0.12 0.11 0.09
0.17 0.145 0.12 0.11 0.09
0.21 0.18 0.16 0.13 0.10
0.21 0.18 0.16 0.13 0.10
70°C
0.04
0.04
0.06
0.06
0.08
0.08
0.11
0.11
85°C
0.03
0.03
0.05
0.05
0.06
0.06
0.083
0.083
Temperature Rerating Curve
170%
150%
130%
110%
90%
70%
50%
30%
10%
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80
Temperature (°C)
0.100
0.010
0.001
0.02
0.100
1 10
CURRENT IN AMPERES
100
Specifications are subject to change without notice.
Note: 1.00 means the number one with two decimal places.
AKL V3.9 06.05.18
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.
250R Series
Specifications are subject to change without notice.

Electronics Designers Guide
www.littelfuse.com
©2006 Littelfuse



Littelfuse 250R
POLYFUSE® Resettable PTCs
Radial Leaded
Agency Specification Selection Guide For Telecom and Networking Applications
Product
250R120
250R145
250R180
Lightning
ITU K.20/21/45 – 1.5kV 10/700μs
ITU K.20/21/45 – 4kV 10/700μs*
ITU K.20/21/45 – 1.5kV 10/700μs
ITU K.20/21/45 – 4kV 10/700μs*
Telcordia GR – 974 – 1.0kV 10/1000μs
*Devices should be independently evaluated and tested for use in any specific application
Power Cross
ITU K.20/21/45 – 230Vac, 10Ω
ITU K.20/21/45 – 600Vac, 600Ω
ITU K.20/21/45 – 230Vac, 10Ω
ITU K.20/21/45 – 600Vac, 600Ω
Telcordia GR – 974- 283Vac, 10A
Protection Application Guide
Region/Specification
South America/Asia/Europe
ITU K.45
South America/Asia/Europe
ITU K.21
South America/Asia/Europe
ITU K.20
Application
*Access network equipment
Remote terminal
Repeaters
WAN equipment
Cross –connect
Customer and IT equipment
Analog modems
ADSL, xDSL
Phone sets, PBX systems
Internet appliances
POS terminals
Central Office
POTS/ISDN linecards
T1/E1/J1 linecards
ADSL/VDSL splitters
CSU/DSU
North America
Telcordia GR-974
South America/Asia/Europe
ITU K.20
*Primary protection modules
MDF modules
Network interface
North America
Telcordia GR-1089
South America/Asia/Europe
ITU K.20 and K.21
*Intrabuilding communication systems
LAN, VOIP cards
Local loop handsets
LAN Intrabuilding power cross
Protection
LAN equipment, IP phone
*Resistance binned parts are recommended
Device Selection
250R180
250R180T
250R145
250R145T
250R120
250R120T
250R180
250R180T
250R145
250R145T
250R120
250R120T
250R180
250R180T
250R145
250R145T
250R120
250R120T
250R180
250R180T
250R145
250R145T
250R120
250R120T
250R180
250R180T
250R145
250R145T
250R120
250R120T
250R080
250R Series
Specifications are subject to change without notice.

Electronics Designers Guide
www.littelfuse.com
©2006 Littelfuse







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