BK250 SERIES
Positive Temperature Coefficient (PTC) Data Sheet
Features
■
■
■
■
■
■
■
Radial leaded devices.
Over-current protection
High voltage surge capabilities
Flame retardant epoxy polymer insulating material meets UL94 V-0 requirement.
Available in lead-free version.
Meets MSL level 1, per J-STD-020
Safety certification: UL: E244500
Dimensions (Unit: mm)
Part
Number
BK250-030
BK250-040
BK250-060
BK250-080
BK250-090
BK250-110
BK250-120
BK250-145
BK250-180
BK250-200
BK250-400
BK250-600
BK250-800
A
Max.
6.0
7.4
7.4
7.4
7.4
7.0
7.0
7.5
10.5
10.5
11.2
16.0
20.0
B
Max.
8.0
13.5 / 12.7
14.5 / 12.7
14.5 / 12.7
14.5 / 12.7
14.5 / 10.5
14.5 / 10.5
15.0 / 11.0
18.5 / 14.5
17.0
17.0
18.0
22.0
C
±0.6
5.1
5.1
5.1
5.1
5.1
5.1
5.1
5.1
5.1
5.1
5.1
5.1
5.1
D
Max.
4.6
4.6
4.6
4.6
4.6
4.6
4.6
4.6
4.6
4.6
4.6
4.6
4.6
E
Typ.
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.8
0.8
0.8
F
Min.
7.6
4.6 / 7.6
4.6 / 7.6
4.6 / 7.6
4.6 / 7.6
4.6 / 7.6
4.6 / 7.6
4.6 / 7.6
4.6 / 7.6
7.6
7.6
7.6
7.6
Style.
DZ
DY / DZ
DY / DZ
DY / DZ
DY / DZ
SY / SZ
SY / SZ
SY / SZ
SY/SZ/DZ
SZ / DZ
SZ
SZ
SZ
Revision：15-Jan-16
www.brightking.com
BK250 SERIES
Electrical Characteristics
Part
Number
BK250-030
BK250-040
BK250-060
BK250-080
BK250-090
BK250-110
BK250-120
BK250-145
BK250-180
BK250-200
BK250-400
BK250-600
BK250-800
I
H
(A)
0.03
0.04
0.06
0.08
0.09
0.11
0.12
0.145
0.18
0.20
0.40
0.60
0.80
I
T
(A)
0.06
0.08
0.12
0.16
0.18
0.22
0.24
0.29
0.54
0.40
0.80
1.20
1.60
V
MAXi
(V
AC
)
250
250
250
250
250
250
250
250
250
250
250
250
250
I
MAX
(A)
1
3
3
3
3
3
3
3
10
10
10
10
10
R
MAX
(Ω)
90.0
65.0
45.0
22.0
20.0
12.0
10.5
6.5
3.0
6.0
3.0
2.0
1.0
R
MIN
(Ω)
35.0
27.0
20.0
10.0
7.0
6.0
6.0
3.5
1.0
3.0
1.0
0.6
0.4
Pd
typ.
(W)
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
·I
H
= Hold current: maximum current device will pass without tripping in 25℃ still air.
·I
T
= Trip current: minimum current at which the device will trip in 25℃ still air.
·V
MAXi
= Maximum interrupt voltage device can withstand without damage at rated current.
·I
MAX
= Maximum fault current device can withstand without damage at rated voltage.
·R
MAX
= Maximum resistance of device in initial (un-soldered) state.
·R
MIN
= Minimum resistance of device in initial (un-soldered) state.
·Pd
typ.
= Typical power dissipation from device when in the tripped state at 25℃ still air.
Thermal Derating Chart – I
H
(A)
Part
Number
BK250-030
BK250-040
BK250-060
BK250-080
BK250-090
BK250-110
BK250-120
BK250-145
BK250-180
BK250-200
BK250-400
BK250-600
BK250-800
Maximum Ambient Operating Temperatures (
℃
)
-20
0.040
0.053
0.079
0.106
0.119
0.145
0.158
0.191
0.238
0.264
0.528
0.792
1.056
0
0.035
0.047
0.070
0.094
0.105
0.129
0.140
0.170
0.211
0.234
0.468
0.702
0.936
25
0.030
0.040
0.060
0.080
0.090
0.110
0.120
0.145
0.180
0.200
0.400
0.600
0.800
30
0.027
0.036
0.055
0.073
0.082
0.100
0.109
0.132
0.164
0.182
0.364
0.546
0.728
40
0.025
0.034
0.051
0.068
0.077
0.094
0.102
0.123
0.153
0.170
0.340
0.510
0.680
50
0.023
0.031
0.046
0.062
0.069
0.085
0.092
0.112
0.139
0.154
0.308
0.462
0.616
60
0.020
0.027
0.041
0.054
0.061
0.075
0.082
0.099
0.122
0.136
0.272
0.408
0.544
70
0.017
0.024
0.037
0.049
0.055
0.067
0.073
0.088
0.110
0.122
0.244
0.366
0.488
85
0.013
0.019
0.029
0.038
0.043
0.053
0.058
0.070
0.086
0.096
0.192
0.288
0.384
Revision：15-Jan-16
www.brightking.com
BK250 SERIES
Test Procedures and Requirement
Items
Resistance
Time to Trip
Hold Current
Trip Cycle Life
Trip Endurance
Test Conditions
In still air @25℃
Specified current, V
max
, 25℃
60 min, at I
H
V
max
, I
max
, 100 cycles
V
max
, 24hours
Accept/Reject Criteria
R
min
≤
R
≤
R
max
T
≤
max. Time to trip (T
trip
)
No trip
No arcing or burning
No arcing or burning
Typical Time-to-Trip Charts @25℃
1000
100
N
10
L
K
J
I
H
G
F
E
D
C
B
A
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0
1
0.1
0.01
A=BK250-030
B=BK250-040
C=BK250-060
D=BK250-080
E=BK250-090
F=BK250-110
G=BK250-120
H=BK250-145
I=BK250-180
J=BK250-200
K=BK250-400
L=BK250-600
N=BK250-800
Time to Trip (s)
Fault Current (A)
Storage Recommendations
■
■
■
■
Storage Temperature: -10
℃
~+40
℃
Relative Humidity:
≤80%RH
Keep away from corrosive atmosphere and sunlight.
Period of Storage: 1 year.
Revision：15-Jan-16
www.brightking.com
BK250 SERIES
Wave Soldering Recommendation Parameters
300
3~5s
Soldering
250
200
150
100
50
0
0
245℃~260℃
100℃~130℃
Cooling
50
100
Time (s)
150
200
250
Items
Pre-Heating Zone
Soldering Zone
Cooling Zone
Conditions
Refer to the condition recommended by the flux manufacturer.
Maximum ramping rate should not exceed 4
℃
/sec.
Maximum solder temperature should not exceed 260℃
Forced cooling
Manual Soldering Recommendation Parameters
Items
Soldering condition
Conditions
The highest power of the manual soldering iron should be 30W or less, soldering
temperature should not be higher than 280℃.
The soldering time should be kept within 3 seconds, otherwise it might cause
insulation layer cracking, and increased part resistance.
The distance on the leads between the soldering point and bottom of the PPTC
body should be equal or greater than 4mm.
The soldering iron should not contact the PPTC body except the leads. If the
soldering conditions are kept to lower temperature, less time and larger distance,
the outcome of the soldering will be better.
Soldering time
Soldering position
Other
Notes: 1. Before using the device must be stored in the original bags, if the storage conditions do not guarantee,
the device may not be able to meet the given value.
2. The devices can’t used for reflow soldering.
Revision：15-Jan-16
www.brightking.com
BK250 SERIES
Mechanical Characteristics
Items
Tensile strength
Bending strength
Vibration
Specifications
No visible damage
No visible damage
No visible damage
Test Conditions/Methods
1.0Kgf, 10 seconds
0.5Kgf, 90°, 3 times
Freq: 10-55Hz, Amp: 0.75mm, 1min
Reliability Test
Items
Solder ability
Resistance to
soldering heat
Damp heat,
steady state
Temperature
cycling
Specifications
No visible damage，Solder OK,
Solder area
≥95%
No visible damage,
Electrical OK,
│△R/R0│≦50%
No visible damage, Electrical OK,
│△R/R0│≦20%
No visible damage, Electrical OK,
│△R/R0│≦20%
Test Conditions/Methods
245±5℃, 2±1s, dipping depth=0.5inch max
from the body
260±5℃, 10+2/-0s
40±2℃, 90~95 % RH, total 48Hrs, after 4Hrs
test electrical parameter
Ta＝-10+0/-1℃ 30min, Ta＝70+1/-0℃ 30min,
5cycles, after 1hr test electrical parameter
Packaging
Bag
Part
Number
BK250-030
BK250-040
BK250-060
BK250-080
BK250-090
BK250-110
Inner Box
BK250-120
BK250-145
BK250-180
BK250-200
BK250-400
BK250-600
BK250-800
150×200
120×150
500pcs/bag
2000pcs/box
120×150
1000pcs/bag
4000pcs/box
Dimension
A×B (mm)
Quantity
Revision：15-Jan-16
www.brightking.com
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