Positive Thermal Coefficient (PTC)
RL250 Series
Description
Positive Thermal Coefficient devices(PTC),provide over-current
protection for electrical and electronic devices. They function
using conducting strips of metal imbedded inside polymers.
Under normal conditions, the devices resistance is near zero,
but over-current conditions will heat the PTC and expand the
polymer, increasing the impedance. When current returns to
normal, the components cool down, returning to their original
shape and very low levels of resistance.
Applications
l Over-current and over-temperature protection of
Features
automotive electronics
l I(hold): 0.02~2.0A
l Hard disk drives
l 250V Operating voltages
l PC motherboards
l Radial leaded devices.
l Point-of-sale (POS) equipment
l Over-current protection
l PCMCIA cards
l Very high voltage surge capabilities.
l USB port protection - USB 2.0, 3.0 & OTG
l Available in lead-free version.
l HDMI 1.4 Source protection
l Fast time–to–trip
l Computers & peripherals
l RoHS compliant, Lead- Free and Halogen-Free
l Industrial control
l Security systems
Part Number Code
R
L
X
LOGO
X
X
-
X
Voltage rating(VDC)
X
X
Hold current
Environmental Specifications
Test
Conditions
Resistance change
Passive aging
+85℃,1000hrs
±8% typical
Humidity aging
+85℃,85%R.H.1000hrs
±8% typical
Thermal shock
+125℃ to -55℃,10times
±12% typical
Resistance to solvent
MIL-STD-202,Method 215
No change
Vibration
MIL-STD-202,Method 201
No change
Specifications are subject to change without notice.
Please refer to http://www.ruilon.com.cn for current information.
Revised: 2018-07-10
Page:1
Positive Thermal Coefficient (PTC)
RL250 Series
Electrical Characteristic
Ihold
(A)
IT
(A)
Vmax
(V)
RL250-020
0.02
0.04
RL250-030
0.03
RL250-040
Model
Maximum Time to Trip
Imax
(A)
Pd Typ
(W)
Current(A)
Time(S)
250
0.5
0.5
3
0.06
250
0.5
0.5
0.04
0.08
250
0.5
RL250-050
0.05
0.10
250
RL250-060
0.06
0.12
RL250-080
0.08
RL250-090
Resistance(Ω)
Rimin
R1max
1.0
80
240
3
1.0
40
180
2
3
1.0
27
100
0.5
1.5
3
1.0
20
90
250
0.5
2
3
1.0
20
90
0.16
250
1
0.5
3
1.0
12
33
0.09
0.18
250
1
0.8
3
1.0
10
33
RL250-100
0.10
0.20
250
1
1.0
3
1.0
10
31
RL250-110
0.11
0.22
250
1
2.0
3
1.0
6
18
RL250-120
0.12
0.24
250
1
2.0
3
1.0
5
18
RL250-145
0.145
0.29
250
1
5
3
1.0
3
14
RL250-180
0.18
0.50
250
3
3
3
1.0
0.8
6
RL250-200
0.20
0.40
250
3
5
5
1.5
1.5
9
RL250-300
0.30
0.60
250
3
6
5
1.5
1.0
9
RL250-400
0.40
0.80
250
3
8
5
2.5
0.75
6
RL250-500
0.50
1.00
250
3
10
5
2.5
0.45
5
RL250-600
0.60
1.20
250
3
12
5
3.0
0.5
5
RL250-800
0.80
1.60
250
5
18
5
3.5
0.4
3
RL250-1000
1.00
2.00
250
5
20
7
4.0
0.28
2.5
RL250-1200
1.20
2.40
250
6
15
3
5.0
0.2
2.5
RL250-1500
1.50
3.00
250
7.5
14
3
6.0
0.13
2.0
RL250-2000
2.00
4.00
250
10
14
5
6.0
0.12
1.5
IH=Hold current: maximum current at which the device will not trip at 25℃ still air.
IT=Trip current: minimum current at which the device will nalways at 25℃ still air.
V max=Maximum voltage device can withstand without damage at rated current.
Imax=Maximum fault current device can withstand tithout damage at rated voltage.
T trip=Maximum time to trip(s) at assigned current.
Pd=Typical power dissipation: typical amount of power dissipated by the decice when in state air environment.
Ri min=Minimum device resistance at 25℃ prior to tripping.
R1 max=Maximum device resistance is measured one hour post reflow.
Specifications are subject to change without notice.
Please refer to http://www.ruilon.com.cn for current information.
Revised: 2018-07-10
Page:2
Positive Thermal Coefficient (PTC)
RL250 Series
Solder reflow conditions
Wave Soldering
300
Soldering Temperature:260℃~270℃
250
Soldering Time:≤3sec.
200
Soldering Position: Resettable fuse wire and the bottom ≥ 6mm。
Manual soldering
Soldering Temperature:250℃~280℃
Temperature℃
5s max.
Soldering
245℃-260
Pre-heating
150
100℃-130℃
100
Cooling
50
Soldering Time:≤3sec.
0
Soldering Position: Resettable fuse wire and the bottom ≥ 6mm。
0
50
100
150
200
250
Time(s)
Environmental temperature and IH,IT
300
250
200
150
100
IT
50
IH
0
-30
-20
-10
0
10
Specifications are subject to change without notice.
Please refer to http://www.ruilon.com.cn for current information.
20
30
40
50
Revised: 2018-07-10
60
70
80
85
Page:3
Positive Thermal Coefficient (PTC)
RL250 Series
Product Dimensions
Marking
Marking
Pig.1
Marking
Marking
Pig.2
Pig.3
Pig.4
Dimensions(mm)
Type Number
Marking
Pig.5
Dimensions(in)
A(max)
B(max)
C(typ)
D(max)
LeadΦ
(typ)
Fig
0.6
0.291
0.500
0.201
0.177
0.024
2
4.5
0.6
0.291
0.500
0.201
0.177
0.024
2
5.1
4.5
0.6
0.291
0.500
0.201
0.177
0.024
2
12.7
5.1
4.5
0.6
0.291
0.500
0.201
0.177
0.024
2
7.4
12.7
5.1
4.5
0.6
0.291
0.500
0.201
0.177
0.024
2
RL250-080
7.4
12.7
5.1
4.5
0.6
0.291
0.500
0.201
0.177
0.024
2
RL250-090
7.4
12.7
5.1
4.5
0.6
0.291
0.500
0.201
0.177
0.024
2
RL250-100
7.0
9.3
5.1
4.5
0.6
0.276
0.366
0.201
0.177
0.024
1
RL250-110
7.0
12.6
5.1
4.5
0.6
0.276
0.496
0.201
0.177
0.024
4
RL250-120
7.1
12.6
5.1
4.5
0.6
0.28
0.496
0.201
0.177
0.024
4
RL250-145
7.1
12.6
5.1
4.5
0.6
0.28
0.496
0.201
0.177
0.024
4
RL250-180
10.2
14.5
5.1
4.5
0.6
0.402
0.571
0.201
0.177
0.024
2
RL250-200
12
17
5.1
4.5
0.6
0.472
0.669
0.201
0.177
0.024
2
RL250-300
12
17
5.1
4.5
0.6
0.472
0.669
0.201
0.177
0.024
2
RL250-400
12
17
5.1
4.5
0.6
0.472
0.669
0.201
0.177
0.024
5
RL250-500
16
18
5.1
4.5
0.8
0.63
0.709
0.201
0.177
0.031
1
RL250-600
16
18
5.1
4.5
0.8
0.63
0.709
0.201
0.177
0.031
1
RL250-800
20
22
5.1
4.5
0.8
0.787
0.866
0.201
0.177
0.031
1
RL250-1000
20
22
5.1
4.5
0.8
0.787
0.866
0.201
0.177
0.031
1
RL250-1200
22
28
5.1
4.5
0.8
0.866
1.102
0.201
0.177
0.031
1
RL250-1500
25
30
5.1
4.5
0.8
0.984
1.181
0.201
0.177
0.031
3
RL250-2000
26
32
10.2
4.5
0.8
1.024
1.26
0.402
0.177
0.031
3
A(max)
B(max)
C(typ)
D(max)
RL250-020
7.4
12.7
5.1
4.5
RL250-030
7.4
12.7
5.1
RL250-040
7.4
12.7
RL250-050
7.4
RL250-060
LeadΦ
(typ)
Shape
Packaging
Part Number
Quantity
RL250-020~RL250-1000
1000pcs/bag
RL250-1200~RL250-2000
500pcs/bag
Specifications are subject to change without notice.
Please refer to http://www.ruilon.com.cn for current information.
Revised: 2018-07-10
Page:4
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