参数资料
| 型号： | 250R145ZR |
| 厂商： | Littelfuse Inc |
| 文件页数： | 4/7页 |
| 文件大小： | 0K |
| 描述： | PTC RESETBL 60V/250V .145A RAD |
| 标准包装： | 1 |
| 系列： | POLYFUSE® 250R |
| 电流 - 维持(Ih)： | 145mA |
| 电流 - 跳闸(It)： | 290mA |
| 电流 - 最大： | 3A |
| 电压 - 最大： | 250V |
| R最小/最大： | 3.000 ~ 14.00 欧姆 |
| 跳闸时间： | 2.5s |
| 封装/外壳： | 径向 |
| 包装： | 剪切带 (CT) |
| 其它名称： | F1976CT |
POLYFUSE ? Resettable PTCs
Radial Leaded > 250R Series
Soldering Parameters - Wave Soldering
Condition
Wave Soldering
Peak Temp/ Duration Time
260°C
5 Sec
> 220°C
Preheat 140°C ~ 180°C
Storage Condition
2 Sec ~ 20 Sec
180 Sec ~ 210 Sec
0°C~35°C
70%RH
260
220
Preheating
Soldering
Cooling
190
N 2 environment for lead-free.
side of the board.
160
and solvents.
0
180 to 210
2 to 5
Time(s)
20-30
Note: If soldering temperatures exceed the recommended
pro?le, devices may not meet the performance
requirements.
Soldering Parameters - Solder Re?ow
Condition
Peak Temp/ Duration Time
Re?ow
260°C > 5 Sec
> 220°C
Preheat 160°C ~ 190°C
Storage Condition
30 Sec ~ 60 Sec
60 Sec ~ 90 Sec
0°C~35°C,
70%RH
260
220
Preheating
Soldering
Cooling
190
air oven, N 2 environment for lead-free.
bottom side of the board.
160
and solvents.
0
60 to 90
30 to 60
Time(s)
120
Note: If re?ow temperatures exceed the recommended
pro?le, devices may not meet the performance
requirements.
Environmental Speci?cations
Physical Speci?cations
Operating/Storage
Temperature
-40°C to +85°C
Lead Material
Soldering
Characteristics
Insulating Material
Device Labeling
250R Series
Tin-plated Copper
Solderability per MIL–STD–202,
Method 208E
Cured, ?ame retardant epoxy polymer
meets UL94V-0 requirements.
Marked with 'LF', voltage, current rating,
and date code.
102
Maximum Device Surface
Temperature in Tripped State
Passive Aging
Humidity Aging
Thermal Shock
Solvent Resistance
Moisture Sesitivity Level
125°C
65°C/85°C, 1000 hours
+85°C, 85% R.H,.1000 hours
MIL–STD–202F, Method 107G
+125°C to -55°C 10 times
MIL–STD–202, Method 215F
Level 1, J–STD–020C
? 2010 Littelfuse, Inc.
Revised: July 12, 2010
Speci?cations are subject to change without notice.
Please refer to www.littelfuse.com/series/250R.html for current information.
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