Radial Lead Resettable Polymer PTCs
UN250 Series
Description
UN250 Series is designed to protect against short duration
high voltage fault currents (power cross or power induction
surge) typically used in AC220V.
Features
u
u
u
u
0.02-2.0A hold current rating
265V operating voltage
Fast time-to- trip
RoHS compliant, Lead-Free and Halogen-Free
Applicable
u
u
u
AC220V over-current protection
Power ports
Customer Premises Equipment(CPE)
Electrical Parameters
Part Number
UN250-020
UN250-030
UN250-040
UN250-050
UN250-060
UN250-080
UN250-120-C
UN250-120-S
UN250-160
UN250-200-C
UN250-200-S
UN250-250
UN250-300
UN250-330
UN250-400
UN250-500
UN250-550
UN250-600
UN250-650
UN250-750
I
hold
(A)
0.020
0.030
0.040
0.050
0.060
0.080
0.120
0.120
0.160
0.200
0.200
0.250
0.300
0.330
0.400
0.500
0.550
0.600
0.650
0.750
I
trip
(A)
V
max
(Vdc)
265
265
265
265
265
265
265
265
265
265
265
265
265
265
265
265
265
265
265
265
I
max
(A)
1.0
1.0
1.0
1.0
1.0
1.2
12
1.2
2.0
3.0
3.0
3.5
4.5
4.5
5.5
6.5
7.0
6.0
6.5
7.5
P
dtyp.
(W)
0.6
0.6
0.7
0.7
0.8
0.8
1.0
1.0
1.4
1.5
1.5
1.5
1.7
1.7
2.0
2.5
2.5
2.5
2.6
2.6
Maximum Time
To Trip
Current
Time
(A)
(Sec.)
0.06
0.09
0.12
0.15
0.18
0.24
0.36
0.36
0.48
0.60
0.60
0.75
0.90
0.99
1.20
1.50
1.65
1.80
1.95
2.25
20
15
15
15
15
15
15
15
25
25
25
20
20
20
25
25
25
25
30
30
Resistance
R
min
(Ω)
65.0
36.0
27.0
22.0
18.0
11.0
6.0
6.0
3.5
3.0
3.0
2.2
1.8
1.6
1.35
0.90
0.85
0.80
0.65
0.55
R
max
(Ω)
165.0
90.0
65.0
55.0
45.0
22.0
12.0
12.0
7.8
6.5
6.5
5.0
4.0
3.6
3.0
2.0
1.8
1.65
1.3
1.1
R
1max
(Ω)
225.0
120.0
90.0
75.0
60.0
33.0
16.0
16.0
10.4
8.0
8.0
5.0
4.8
4.3
3.6
2.4
2.2
2.2
1.6
1.3
0.04
0.065
0.080
0.10
0.120
0.160
0.240
0.240
0.320
0.400
0.400
0.500
0.600
0.660
0.800
1.000
1.100
1.200
1.300
1.500
UN Semiconductor Co., Ltd.
Revision
October 18, 2013
www.unsemi.com.tw
1/5
@ UN Semiconductor Co., Ltd. 2013
Specifications are subject to change without notice.
Please refer to www.unsemi.com.tw for current information.
Radial Lead Resettable Polymer PTCs
UN250 Series
UN250-800
UN250-900
UN250-1000
UN250-1100
UN250-1250
UN250-1350
UN250-1600
UN250-1850
UN250-2000
0.800
0.900
1.000
1.100
1.250
1.350
1.600
1.850
2.000
1.600
1.800
2.000
2.200
2.500
2.700
3.200
3.7
4.000
265
265
265
265
265
265
265
265
265
8.0
9.0
10.0
10.0
10.0
10.0
10.0
10.0
10.0
2.7
2.8
2.9
3.1
3.3
3.5
3.9
4.3
4.5
2.40
2.70
3.00
3.30
3.75
4.05
4.80
5.55
6.00
3.0
35
35
35
40
40
40
50
50
0.5
0.45
0.37
0.33
0.27
0.25
0.20
0.165
0.135
1.0
0.9
0.75
0.66
0.55
0.50
0.40
0.33
0.27
1.2
1.1
0.9
0.80
0.66
0.60
0.48
0.40
0.33
I
hold
= Hold current: maximum current device will pass without tripping in 25°C still air.
I
trip
= Trip current: minimum current at which the device will trip in 25°C still air.
V
max
= Maximum voltage device can withstand without damage at rated current (I
max
)
I
max
= Maximum fault current device can withstand without damage at rated voltage (V
max
)
P
dtyp.
= Power dissipated from device when in the tripped state at 25°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
1max
= Maximum resistance of device at 25°C measured one hour after tripping.
Caution: Operation beyond the specified rating may result in damage and possible arcing and flame.
0.48
0.25
Temperature Rerating Chart
–
I
hold
(A)
Ambient Operation Temperature
Part Number
UN250-020
UN250-030
UN250-040
UN250-050
UN250-060
UN250-080
UN250-120-C
UN250-120-S
UN250-160
UN250-200-C
UN250-200-S
UN250-250
UN250-300
UN250-330
UN250-400
UN250-500
UN250-550
UN250-600
UN250-650
UN250-750
UN250-800
UN250-900
-40°C
0.031
0.047
0.062
0.078
0.093
0.124
0.186
0.186
0.248
0.310
0.310
0.390
0.470
0.510
0.620
0.780
0.850
0.930
1.010
1.160
1.240
1.400
-20°C
0.027
0.041
0.055
0.069
0.082
0.110
0.164
0.164
0.219
0.274
0.274
0.340
0.410
0.450
0.550
0.690
0.750
0.820
0.890
1.030
1.100
1.230
0°C
0.024
0.036
0.048
0.060
0.070
0.095
0.143
0.143
0.190
0.238
0.238
0.300
0.360
0.390
0.480
0.600
0.660
0.710
0.770
0.890
0.950
1.070
25°C
0.020
0.030
0.040
0.050
0.060
0.080
0.120
0.120
0.160
0.200
0.200
0.250
0.300
0.330
0.400
0.500
0.550
0.600
0.650
0.750
0.800
0.900
40°C
Hold Current (A)
0.016
0.025
0.033
0.041
0.049
0.066
0.098
0.098
0.131
0.164
0.164
0.210
0.250
0.270
0.330
0.410
0.45
0.490
0.530
0.620
0.660
0.740
50°C
0.015
0.022
0.029
0.037
0.044
0.059
0.088
0.088
0.117
0.146
0.146
0.180
0.220
0.240
0.290
0.370
0.400
0.440
0.470
0.550
0.580
0.660
60°C
0.013
0.019
0.026
0.032
0.038
0.051
0.077
0.077
0.102
0.128
0.128
0.160
0.190
0.210
0.260
0.320
0.35
0.380
0.420
0.480
0.510
0.580
70°C
0.011
0.017
0.022
0.028
0.033
0.044
0.066
0.066
0.088
0.110
0.110
0.140
0.170
0.180
0.220
0.280
0.300
0.330
0.360
0.410
0.440
0.500
85°C
0.008
0.012
0.016
0.021
0.025
0.033
0.049
0.049
0.064
0.082
0.082
0.100
0.012
0.140
0.160
0.210
0.230
0.250
0.27
0.310
0.330
0.370
UN Semiconductor Co., Ltd.
Revision
October 18, 2013
www.unsemi.com.tw
2/5
@ UN Semiconductor Co., Ltd. 2013
Specifications are subject to change without notice.
Please refer to www.unsemi.com.tw for current information.
Radial Lead Resettable Polymer PTCs
UN250 Series
UN250-1000
UN250-1100
UN250-1250
UN250-1350
UN250-1600
UN250-1850
UN250-2000
1.550
1.710
1.940
2.090
2.480
2.870
3.100
1.370
1.510
1.710
1.850
2.190
2.530
2.740
1.190
1.310
1.490
1.610
1.900
2.200
2.380
1.000
1.100
1.250
1.350
1.600
1.850
2.000
0.820
0.900
1.030
1.110
1.310
1.520
1.640
0.730
0.800
0.910
0.990
1.170
1.350
1.460
0.640
0.700
0.800
0.860
1.020
1.180
1.280
0.550
0.610
0.690
0.740
0.880
1.020
1.100
0.410
0.450
0.510
0.550
0.660
0.760
0.820
Average Time Current Curves
Temperature Rerating Curve
Percentage of Rated Current
Time in Seconds
Current in Amperes
Temperature (°C)
Test Procedures and Requirement
Test
Resistance
Hold Current
Time to Trip
Trip Cycle Life
Trip Endurance
Test Conditions
R
min
≤R≤R
max
No trip
Accept/Reject Criteria
In still air @25±2°C
60 min, at I
hold
, In still air @25±2°C
Specified current, V
max
, @25±2°C
V
max
, I
max
,100 cycles
Vmax,24hours
T≤Maximum Time To Trip
No arcing or burning
No arcing or burning
Soldering Parameters
Pre-Heating Zone
Soldering Zone
Cooling Zone
Refer to the condition recommended
by the manufacturer. Max. ramping
rate should not exceed 4°C/Sec
Max. solder temperature should not
exceed 260°C
Cooling by natural convection in air
Physical Specifications
Lead Material
Soldering
Characteristics
Insulating Material
0.02-0.04A Tin-plated Copper clad steel
0.05-2.00A Tin-plated Copper
Solder ability per MIL-STD-202, Method 208E
Cured,
flame
retardant epoxy polymer meets UL 94V-0
requirements.
UN Semiconductor Co., Ltd.
Revision
October 18, 2013
www.unsemi.com.tw
3/5
@ UN Semiconductor Co., Ltd. 2013
Specifications are subject to change without notice.
Please refer to www.unsemi.com.tw for current information.
Radial Lead Resettable Polymer PTCs
UN250 Series
Device Labeling
Marked with
‘UN’,
voltage, current rating
Dimensions
Figure1
A
Part Number
Figure
mm
Max.
6.0
6.0
6.0
6.0
6.0
6.0
7.2
6.5
9.3
10.0
9.3
9.3
9.3
9.3
10.5
11.8
11.8
11.8
14.0
14.5
14.5
16.5
21.1
19.0
24.2
19.0
21.5
25.0
25.0
Figure2
B
mm
Max.
8.7
8.7
9.3
9.3
10.0
10.0
11.2
10.5
12.8
13.5
12.8
12.8
14.5
14.5
16.5
17.5
17.5
17.5
18.3
21.7
21.7
24.5
25.1
25.5
28.2
29.0
29.0
29.0
33.5
C
mm
Typ.
5.1±0.5
5.1±0.5
5.1±0.5
5.1±0.5
5.1±0.5
5.1±0.5
5.1±0.5
5.1±0.5
5.1±0.5
5.1±0.5
5.1±0.5
5.1±0.5
5.1±0.5
5.1±0.5
5.1±0.5
5.1±0.5
5.1±0.5
5.1±0.5
5.1±0.5
5.1±0.5
5.1±0.5
10.2±0.5
10.2±0.5
10.2±0.5
10.2±0.5
10.2±0.5
10.2±0.5
10.2±0.5
10.2±0.5
Figure3
D
mm
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
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
4.6
4.6
4.6
Figure4
Lead (dia)
Packaging
mm
0.5
0.5
0.5
0.5
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
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
(Bulk Pack)
UN250-020
UN250-030
UN250-040
UN250-050
UN250-060
UN250-080
UN250-120-C
UN250-120-S
UN250-160
UN250-200-C
UN250-200-S
UN250-250
UN250-300
UN250-330
UN250-400
UN250-500
UN250-550
UN250-600
UN250-650
UN250-750
UN250-800
UN250-900
UN250-1000
UN250-1100
UN250-1250
UN250-1350
UN250-1600
UN250-1850
UN250-2000
Figure1(2)
Figure1(2)
Figure1(2)
Figure1(2)
Figure1
Figure1
Figure1
Figure3
Figure1
Figure1
Figure3
Figure3
Figure3
Figure3
Figure4
Figure4
Figure4
Figure4
Figure4
Figure4
Figure4
Figure4
Figure2
Figure4
Figure2
Figure4
Figure4
Figure4
Figure4
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
500
500
500
500
500
500
200
200
200
200
200
200
100
200
UN Semiconductor Co., Ltd.
Revision
October 18, 2013
www.unsemi.com.tw
4/5
@ UN Semiconductor Co., Ltd. 2013
Specifications are subject to change without notice.
Please refer to www.unsemi.com.tw for current information.
Radial Lead Resettable Polymer PTCs
UN250 Series
Warning
u
This product should not be used in an application where the maximum interrupt voltage or maximum interrupt current in a
fault condition, Operation beyond the maximum rating or improper use may result in device damage and possible electrical
arcing and flame.
u
A PPTC device is not a fuse, It is a nonlinear thermistor that limits current, Because under a fault condition all PPTC devices
go into a high resistance state but not open circuit hazardous voltage may be present at PPTC.
u
The devices are intended for protection against occasional over-current or over-temperature fault conditions and should not
be used when repeated fault conditions or prolonged trip events.
u
In most application, power must be removed and the fault condition cleared in order to reset a PPTC device.
u
PPTC devices are not recommended to be installed in applications where the device is constrained such that its PPTC
properties are inhibited, for example in rigid potting materials or Add devices surface coating, Bundled devices ontology,
which lack adequate clearance to accommodate device expansion.
u
Contamination on of the PPTC material with certain silicone-based oils or some aggressive solvents can adversely impact the
performance of the devices. For example, Organic solvents to cleaning.
UN Semiconductor Co., Ltd.
Revision
October 18, 2013
www.unsemi.com.tw
5/5
@ UN Semiconductor Co., Ltd. 2013
Specifications are subject to change without notice.
Please refer to www.unsemi.com.tw for current information.
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