250S130_0911 Datasheet, PDF (1/5 Pages) Littelfuse – POLYFUSE® Resettable PTCs

POLYFUSE^® Resettable PTCs
Surface Mount > 250S Series
250S Series
Agency Approvals
AGENCY AGENCY FILE NUMBER
E183209
Description
The 250S High Voltage Radial device is a Polymer-based
PTC suitable to protect telephony equipment against
lightining and power cross strikes. The 250S Series is
fully compatible with telecommunications standards, and
is offered in horizontal and new vertical surface mount
package.
Features
• RoHS Compliant,
Directive 2002/95/EC
• Lead-Free & Halogen-Free
• Low resistance
• Compatible with telecom
standards
• Helps meets ITU K.20,
K.21/Telcordia standards
• Excellent solder joint
inspectability
• High voltage
Applications
• Customer Premises
Equipment (CPE)
• Central Office (CO)/
telecom centers
• LAN/WAN equipment
• Access equipment
Electrical Characteristics
Part Number
250S130
250S130–RA
250S130–RB
250S130–RC
250S130V
Device
I
Mounting
hold
Layout
(A)
0.13
0.13
Horizontal
0.13
0.13
Vertical 0.13
I
trip
V
max
I
max
P typ.
d
Time to Trip at 1A
Resistance
Agency
Approvals
(A) (V /V ) (A)
int op
(W)
Typical Maximum R _min R _max R _1max
(Sec.)
(Sec.)
(Ω) (Ω) (Ω)
0.26 250/60 3
1.2
0.9
4.0
4
13
20
–
0.26 250/60 3
1.2
1.4
4.0
6.5 10
15
–
0.26 250/60 3
1.2
0.7
4.0
9
13
20
–
0.26 250/60 3
1.2
1.1
4.0
7
11
17
–
0.26 250/60 3
1.2
2.0
4.0
4
13
20
–
I _hold = Hold current: maximum current device will pass without tripping in 23°C still air.
I _trip = Trip current: minimum current at which the device will trip in 23°C still air.
V = Maximum voltage the device can withstand without damage at rated current (I max)
int
V = The device regular operation voltage
op
I _max = Maximum fault current device can withstand without damage at rated voltage (V_max)
P _d = Power dissipated from device when in the tripped state at 23°C still air.
R _min = Minimum resistance of device in initial (un-soldered) state.
R _max = Maximum resistance of device in initial (un-soldered) state.
R = Maximum resistance of device at 20°C measured one hour after tripping.
1max
Caution: Operation beyond the specified rating may result in damage and possible arcing
and flame.
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/250S.html for current information.
57
Revised: November 30, 2009
250S Series