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參數資料
| 型號： | 2029S100 |
| 廠商： | Littelfuse, Inc. |
| 英文描述： | SURFACE MOUNT PTC |
| 中文描述： | PTC的表面貼裝 |
| 文件頁數： | 1/2頁 |
| 文件大小： | 148K |
| 代理商： | 2029S100 |
22
RESETTABLE PTCs
SURFACE MOUNT PTC
2029L/3425L Series
TUV
The 2029L/3425L Series Resettable devices utilize a
unique polymer-based, Positive Temperature Coefficient
(PTC) material to protect electrical circuits against over-
current conditions.
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.
The 2029L/3425L Series are surface mountable.
AGENCY APPROVALS:
Recognized under the
Components Program of Underwriters Laboratory and the
Component Acceptance Program of CSA. TUV approved.
AGENCY FILE NUMBERS:
UL E183209, CSA LR 108832
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:
ENVIRONMENTAL SPECIFICATIONS:
Passive Aging:
85°C, 1000 Hours. ±5% typical resistance
change.
Humidity Aging:
85°C, 85% R.H., 1000 hours. ±5% typi-
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
Part
Number
2029L Series
3425L Series
Reel
Quantity
2000
1500
Packaging
Suffix
PR
DR
-40
-30
-20
-10
0
10
Temperature (
°
C)
20
30
40
50
60
70
80
90
0
50
100
150
200
P
Rerating Curve for 2029L /3425L Series
For NEW Designs use 1812L series PTC in place of the 2029L
Series.
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