2029S100PR [LITTELFUSE]
RESISTOR, TEMPERATURE DEPENDENT, PTC, SURFACE MOUNT;
| 型号： | 2029S100PR |
| 厂家： | 
LITTELFUSE |
| 描述： | RESISTOR, TEMPERATURE DEPENDENT, PTC, SURFACE MOUNT 过载保护 电阻器 |
| 文件： | 总2页 (文件大小：148K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
RESETTABLE PTCs
SURFACE MOUNT PTC
®
TUV
®
2029L/3425L Series
PRODUCT SERVICE
• The 2029L/3425L Series Resettable devices utilize a
unique polymer-based, Positive Temperature Coefficient
(PTC) material to protect electrical circuits against over-
current conditions.
ENVIRONMENTAL SPECIFICATIONS:
Passive Aging: 85°C, 1000 Hours. ±5% typical resistance
change.
Humidity Aging: 85°C, 85% R.H., 1000 hours. ±5% typi-
• In normal operation, the 2029L/3425L Series PTC has
many conductive paths and a very low resistance. In an
overcurrent condition, the temperature of the polymer
material rises. This dramatically reduces the conductive
paths resulting in an immediate rise in resistance. In this
condition, the device provides circuit protection by signif-
icantly limiting the flow of current. However, once the
cause of the initial overcurrent condition is eliminated,
the 2029L/3425L Series PTC cools down and resets to a
low resistance value permitting the normal current flow
to resume.
cal resistance change.
Thermal Shock: 85°C / –40°C, 20 times. ±10% typical
resistance change.
Vibration: MIL-STD 202, Method 201. No resistance
change.
Mechanical Shock: MIL-STD-202, Method 213 test condi-
tion I (100 g’s, 6 sec.). No resistance change.
Max. Surface Temperature: 125°C
Operating/Storage Temperature: –40°C to 85°C
• The 2029L/3425L Series are surface mountable.
Rerating Curve for 2029L /3425L Series
OBSOLETE
200
AGENCY APPROVALS: Recognized under the
Components Program of Underwriters Laboratory and the
Component Acceptance Program of CSA. TUV approved.
150
AGENCY FILE NUMBERS: UL E183209, CSA LR 108832
100
PHYSICAL SPECIFICATIONS:
Materials: Terminal Material: Tin Plated Brass to
MIL-T-10727B
Lead Solderability: Meets EIA specification RS186-9E
Device Labeling: Device is marked with the letter ‘L’,
amperage rating and date code.
Packaging: Packaged in tape and reel carrier per
EIA 481-2 standard
Standard reel quantities:
PAR50 T
0
-40 -30 -20 -10
0
10
20
30
40
50
60
70
80
90
Temperature (°C)
For NEW Designs use 1812L series PTC in place of the 2029L
Series.
Part
Number
Reel
Quantity
Packaging
Suffix
2029L Series
3425L Series
2000
1500
PR
DR
22
RESETTABLE PTCs
SURFACE MOUNT PTC
2029L/3425L Series
Average Time Current Curves
Dimensions (Inches) Recommended Pad Layout (Inches)
All dimensions are nominal.
B
D
100
A
MARKING
E
F
.120
10
.020-.035
.025*
.025
C
*0.010 for 2029L050
Series
A
B
C
D
E
F
1
2029L
3425L
.214 max.
.264 max.
.314 max. .090 .120 .090 .380
.374 max. .145 .180 .090 .420
RECOMMENDED REFLOW CONDITIONS:
(IR, Forced Air Convection, Vapor Phase)
OBSOLETE
Devices are not designed to be wave soldered.
0.1
0.01
0.1
1
10
100
PART
CURRENT IN AMPERES
ORDERING INFORMATION:
Maximum Time
To Trip
Resistance
Catalog
Number
Ihold
(A)
Itrip
(A)
Vmax
(Vdc)
Imax
(A)
Pd max.
(W)
Current
(A)
Time
(Sec)
RIL
(Ω)
RAT
(Ω)
2029L030
2029L050
2029L075
2029S100
2029L100
2029L125
0.30
0.50
0.75
1.10
1.10
1.25
0.6
1.0
1.5
2.2
2.2
2.5
60
60
30
15
30
15
10
10
40
40
40
40
1.7
1.7
1.7
1.7
1.7
1.7
1.5
2.5
8.0
8.0
8.0
8.0
3.0
4.0
0.3
0.5
0.5
2.0
1.200
0.350
0.350
0.120
0.120
0.070
4.80
1.40
1.00
0.48
0.48
0.25
3425L150
3425L200
3425L250
2029L260
1.50
2.00
2.50
2.60
3.0
4.0
5.0
5.2
15
15
15
6.0
40
40
40
40
1.9
1.9
1.9
1.7
8.0
8.0
8.0
8.0
5.0
12.0
25.0
20.0
0.060
0.050
0.035
0.025
0.25
0.13
0.09
0.075
Ihold
=
=
=
=
=
=
=
Hold Current: maximum current device will sustain for 4 hours without tripping in 20°C still air.
Trip Current: minimum current at which the device will trip in 20°C still air.
I
trip
Vmax
Imax
Pd
RIL
RAT
Maximum voltage device can withstand without damage at rated current (Imax
)
Maximum fault current device can withstand without damage at rated voltage (V
)
max
Power dissipated from device when in the tripped state at 20°C still air.
Minimum resistance of device in initial (un-soldered) state.
Maximum resistance of device at 20°C measured one hour after tripping or reflow soldering of 260°C for 20 sec.
CAUTION: Operation beyond the specified ratings may result in damage and possible arcing and flame.
23
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