Polymer PTC Resettable Fuse：KRT Series
：
Radial Leaded Type KRT250 For Telecom Application
Features
1. RoHS compliant
2.
Broadest range of resettable devices available in the industry
3.
Current ratings from 0.08 to 0.18A
4. Maximum operating voltage is 60V, maximum interrupt voltage
is 250V
5. Operating temperature range : -40 ~ +85℃
6. Agency Recognition :UL /cUL/TUV
Recommended Applications
1. Telecommunication
2. Network equipment
Part Number Code
K
1
R
2
T
3
2
4
5
5
0
6
0
7
0
8
1
9
2
10
F
11
B
12
Y
13
14
15
16
Product Type
K
Thinking
PPTC
thermistor
Form Factor
R
Radial
G
T
Usage
General
Telecom
Max. Operating
Voltage
016
030
060
16V
30V
60V
I hold
0008
0090
0014
0135
0170
0600
1000
1200
0.08A
0.9A
0.14A
1.35A
1.7A
6A
10A
12A
Appearance
S
I
F
Straight lead
Inner kink lead
Y Kink lead
B
R
Packaging
Bulk
Taping & Reel
Note : for
telecom with
Vmax. interrupt
250
600
250V
600V
Optional Suffix
Y
RoHS
compliant
Structure and Dimensions
Style 1
Style 2
Style 3
Style 4
Marking: Device is marked Vmax. operation, I hold
THINKING ELECTRONIC INDUSTRIAL Co., LTD.
All specifications are subject to change without notice
1
www.thinking.com.tw
2009.10
Polymer PTC Resettable Fuse：KRT Series
：
Radial Leaded Type KRT250 For Telecom Application
A
Part no.
KRT2500008
KRT2500008XXU
KRT2500011
KRT2500011XXU
KRT2500012
KRT2500012XXU
KRT2500015
KRT2500015XXU
KRT2500018
KRT2500018XXU
Max.
5.8
5.1
6.8
5.9
6.5
6.0
6.5
6.0
10.9
10.4
B
Max.
9.6
9.1
9.9
9.4
11.0
10.0
11.0
10.0
12.6
12.6
C
Typ.
5.0±0.8
5.0±0.8
5.0±0.8
5.0±0.8
5.0±0.8
5.0±0.8
5.0±0.8
5.0±0.8
5.0±0.8
5.0±0.8
D
Typ.
4.7
4.7
4.7
4.7
4.7
4.7
4.7
4.7
4.7
4.7
E
Max.
4.6
3.8
4.6
3.8
4.6
3.8
4.6
3.8
4.6
3.8
F
Typ.
0.65±0.04
0.65±0.04
0.65±0.04
0.65±0.04
0.65±0.04
0.65±0.04
0.65±0.04
0.65±0.04
0.65±0.04
0.65±0.04
(Unit: mm)
Figure
Style
1
3
1
3
2
4
2
4
2
4
Electrical Characteristics(23℃)
℃
Vmax.
Imax.
Part no.
(V
dc
)
(A)
Ihold
Itrip
Vmax
@ 23℃ @ 23℃ Interrupt
Pd
(Max.)
Maximum
Time to Trip
Resistance (Ω)
Initial (Ri)
Post trip (R1)
Safety
Approvals
UL/cUL
TUV
(A)
(A)
(V
AC
)
(W)
1.00
1.00
1.00
1.00
1.00
1.00
1.00
1.00
1.50
1.50
(A)
0.35
0.35
1.00
1.00
1.00
1.00
1.00
1.00
1.50
1.50
(Sec.)
4.00
4.00
2.00
2.00
2.00
2.00
2.50
2.50
11.00
10.00
Min.
14.00
14.00
5.00
5.00
4.00
6.00
3.00
3.50
0.80
0.80
Max.
33.00
33.00
16.00
16.00
16.00
16.00
12.00
12.00
4.00
4.00
KRT2500008
60
3.0
0.080 0.160
250
KRT2500008XXU
60
3.0
0.080 0.160
250
KRT2500011
60
3.0
0.110 0.220
250
KRT2500011XXU
60
3.0
0.110 0.220
250
KRT2500012
60
3.0
0.120 0.240
250
KRT2500012XXU
60
3.0
0.120 0.240
250
KRT2500015
60
3.0
0.150 0.290
250
KRT2500015XXU
60
3.0
0.150 0.290
250
KRT2500018
60
10.0
0.180 0.650
250
KRT2500018XXU
60
10.0
0.180 0.650
250
Note1: The first X is appearance, the second X is packaging.
Note2: U=Uncoating
Note3: UL&cUL File No. E138827
TUV File No. R50066618
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
THINKING ELECTRONIC INDUSTRIAL Co., LTD.
All specifications are subject to change without notice
2
www.thinking.com.tw
2009.10
Polymer PTC Resettable Fuse：KRT Series
：
Radial Leaded Type KRT250 For Telecom Application
Typical Time to Trip Curves at 23℃
℃
Time to trip (sec.)
1= KRT2500008
2= KRT2500011
3= KRT2500012
4= KRT2500015
5= KRT2500018
Fault current (A)
Thermal Derating Curve
Derating Curves for KRT 250 Series
Percentage of Derated Current
A=
KRT2500018 (U)
B=Others
Temperature (°
C)
THINKING ELECTRONIC INDUSTRIAL Co., LTD.
All specifications are subject to change without notice
3
www.thinking.com.tw
2009.10
Polymer PTC Resettable Fuse：KRT Series
：
Radial Leaded Type KRT250 For Telecom Application
Reliability
Item
Passive Aging
Humidity storage
Rapid Change of
IEC60738-1
Temperature
Vmax,120% Imax ,50 cycles
Overload Endurance
UL 1434
Vmax,300% Itrip ,6000 cycles
Trip endurance
UL 1434
Vmax, Itrip≦ I≦Imax , 1000±24hrs
No arcing or burring
No arcing or burring
85±5/-40±5℃, 10 cycles
±5% typical resistance change
Standard
IEC60738-1
Specification Standard
Test Condition/methods
85±5℃, 1000±24hrs
85±5℃, 80~85%RH, 1000±24hrs
Criteria
±5% typical resistance change
±5% typical resistance change
THINKING ELECTRONIC INDUSTRIAL Co., LTD.
All specifications are subject to change without notice
4
www.thinking.com.tw
2009.10
Polymer PTC Resettable Fuse：KRT Series
：
Radial Leaded Type KRT250 For Telecom Application
Packaging
Devices taped using EIA468-B/IEC286-2 standards. See table below and Fig. 1~3 for details.
Dimension description
Sprocket hole pitch
Ordinate to adjacent component lead
KRT2500008-KRT2500018
Device pitch
KRT2500008-KRT2500018
Lead spacing
Carrier tape width
Top distance between tape edges
Hold-down tape width
Sprocket hole position
Abscissa to top
Abscissa to plane (kinked lead)
Sprocket hole diameter
Lead protrusion
Tape thickness
Body lateral deviation
Body tape plane deviation
Reel width
Reel diameter
Arbor hole diameter
Core diameter
IEC Mark
P
0
P
1
P
C
W
W
0
W
1
W
2
H
1
H
0
D
0
L
1
t
∆h
∆p
W
3
n
0
n
Dimension (mm)
12.7
3.6
12.7
See “ Structure and Dimensions”
18
3.0
12
9.0
32.2
16.0
4
1
0.9
0
0
56
340
31
80
Tolerance (mm)
±0.3
±1.0
±1.0
--
±1.0
Max
±1.0
+0.75/-0.5
Max.
±0.5
±0.2
Max.
Max.
±1.0
±1.3
Max.
±10
±1
Min.
Taping Specification
T
P
P
p
p
△
h
△
h
p
p
P
1
W
0
W
2
W
W
1
L
1
C
P
0
D0
H1
P
1
H
H
0
W
2
W
W
1
L
1
H0
C
t
P
0
C
D
0
Fig.1
Fig.2
Note:
1.
2.
For KRT2500008, KRT2500011, pls see Fig. 1.
For KRT2500012-KRT2500018, pls see Fig. 2.
THINKING ELECTRONIC INDUSTRIAL Co., LTD.
All specifications are subject to change without notice
5
www.thinking.com.tw
2009.10
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