Performance Specification
Model |
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Maximum |
Resistance |
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V max |
Imax |
I hold |
I trip |
Pd |
Time To Trip |
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Marking |
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@25°C |
@25°C |
Typ. |
Current |
Time |
R i min |
R1max |
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(V dc) |
(A) |
(A) |
(A) |
(W) |
(A) |
(Sec) |
(W) |
(W) |
|
SMD2018-030SF |
030 |
60 |
10 |
0.30 |
0.60 |
0.9 |
1.5 |
3.00 |
0.500 |
2.300 |
SMD2018-050SF |
050 |
60 |
10 |
0.55 |
1.20 |
1.0 |
2.5 |
3.00 |
0.200 |
1.000 |
SMD2018-075SF |
075 |
60 |
10 |
0.75 |
1.50 |
1.1 |
8.0 |
0.30 |
0.110 |
0.630 |
SMD2018-100SF |
100 |
15 |
35 |
1.10 |
2.20 |
1.1 |
8.0 |
0.40 |
0.060 |
0.360 |
SMD2018-100SF33V |
100 |
33 |
35 |
1.10 |
2.20 |
1.1 |
8.0 |
0.40 |
0.060 |
0.360 |
SMD2018-150SF |
150 |
15 |
35 |
1.50 |
3.00 |
1.1 |
8.0 |
0.80 |
0.050 |
0.170 |
SMD2018-200SF |
200 |
10 |
35 |
2.00 |
4.00 |
1.1 |
8.0 |
2.40 |
0.030 |
0.100 |
V max = Maximum operating voltage device can withstand without damage at rated current (Imax).
I max = Maximum fault current device can withstand without damage at rated voltage (V max).
I hold = Hold Current. Maximum current device will not trip in 25°C still air.
I trip = Trip Current. Minimum current at which the device will always trip in 25°C still air.
Pd = Power dissipation when device is in the tripped state in 25°C still air environment at rated voltage.
Ri min/max = Minimum/Maximum device resistance prior to tripping at 25°C.
R1max = Maximum device resistance is measured one hour post reflow.
CAUTION : Operation beyond the specified ratings may result in damage and possible arcing and flame.
Environmental Specifications
Test |
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Conditions |
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Resistance change |
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Passive aging |
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+85°C, 1000 hrs. |
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I HOLD/I TRIP PASS |
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Humidity aging |
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+85°C, 85% R.H. , 168 hours |
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I HOLD/I TRIP PASS |
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Thermal shock |
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+85°C to -40°C, 20 times |
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I HOLD/I TRIP PASS |
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Resistance to solvent |
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MIL-STD-202,Method 215 |
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電阻不變化 |
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Vibration |
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MIL-STD-202,Method 201 |
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電阻不變化 |
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Ambient operating conditions : - 40 °C to +85 °C |
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Maximum surface temperature of the device in the tripped state is 125 °C |
Thermal Derading Chart
Recommended Hold Current(A) at Ambient Temperature(°C)
Model |
Ambient Operation Temperature |
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-40°C |
-20°C |
0°C |
25°C |
40°C |
50°C |
60°C |
70°C |
85°C |
|
SMD2018-030SF |
0.48 |
0.42 |
0.35 |
0.30 |
0.24 |
0.21 |
0.17 |
0.15 |
0.10 |
SMD2018-050SF |
0.87 |
0.77 |
0.67 |
0.55 |
0.46 |
0.41 |
0.36 |
0.31 |
0.23 |
SMD2018-075SF |
1.19 |
1.05 |
0.91 |
0.75 |
0.61 |
0.54 |
0.47 |
0.41 |
0.32 |
SMD2018-100SF |
1.71 |
1.52 |
1.32 |
1.10 |
0.94 |
0.84 |
0.74 |
0.64 |
0.50 |
SMD2018-150SF |
2.38 |
2.10 |
1.82 |
1.50 |
1.27 |
1.13 |
0.99 |
0.85 |
0.64 |
SMD2018-200SF |
2.95 |
2.65 |
2.35 |
2.00 |
1.74 |
1.59 |
1.44 |
1.29 |
1.06 |
Thermal Derating Curve
Average Time-Current Curve
Soldering Parameters
Profile Feature |
Pb-Free Assembly |
Average Ramp-Up Rate(Ts max to T p) |
3℃/second mac. |
Preheat -Temperature Min(Ts min) -Temperature Max(Ts max) -Time(Ts min to Ts max) |
150℃ 200℃ 60~180 seconds |
Time maintained above: -Temperature(TL) -Time(tL) |
217℃ 60~150 seconds |
Peak Temperature(Tp) |
260℃ |
Ramp-Down Rate |
6℃/second max. |
Time 25℃ to Peak Temperature |
8 minutes max |
Storage Condition |
0℃~30℃,30%~60%RH |
Recommended maximum paste thickness is 0.25mm
Devices can be cleaned using standard industry methods and solvents.
Note 1:All temperature refer to topside of the package, measured on the package body surface.
Note 2: If reflow temperatures exceed the recommended profile, devices may not meet the performance requirements.
Physical Dimensions(mm.)
Model |
A |
B |
C |
D |
E |
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Min. |
Max. |
Min. |
Max. |
Min. |
Max. |
Min. |
Min. |
|
SMD2018- |
4.72 |
5.44 |
4.22 |
4.93 |
0.50 |
1.20 |
0.30 |
0.25 |
Termination Pad Characteristics
Terminal pad materials:Tin-plated Nickel-Copper
Terminal pad solder ability:Meets EIA specification RS186-9E and ANSI/J-STD-002 Category 3.
Recommended Pad Layout (mm.)
注:在此印錫面積條件下,推薦鋼網(wǎng)厚度為≧0.12MM(鋼網(wǎng)厚度不夠要增大刷錫面積)
Packaging Quantity
Part Number |
Quantity |
SMD2018-0100SF33V |
2500 pcs/reel |
Tape & reel packaging per EIA481-1
Tape And Reel Specifications (mm)
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注意事項
PPTC使用注意事項:
·PPTC為熱敏元件,對環(huán)境溫度比較敏感,建議在PPTC周圍不要設(shè)計熱源元件,盡量減少外部熱源的影響。
·請在規(guī)格書規(guī)定的參數(shù)下(<10%)使用,超出電壓電流規(guī)格值,會導致PPTC出現(xiàn)電弧,阻值升高,甚至燒片。
·規(guī)格書的電氣特性,均是基于在大容指定測試板經(jīng)過一次回流焊之后的測試;如果客戶有二次回流焊或者注塑點膠等其他熱工序,會對上述參數(shù)有一定程度的衰減,需要驗證其適用性。
·PPTC貼片產(chǎn)品是為SMT工藝設(shè)計的封裝形式,焊接工藝為回流焊;要求客戶遵守我們推薦的焊盤布局和回流焊配置文件。不正確的電路板布局或回流配置可能會對PPTC的可焊性性能產(chǎn)生負面影響。焊接工藝可參考大容推薦的回流焊曲線。如果回流焊溫度超過推薦的值,PPTC將有可能受到損傷。使用手工焊及波峰焊接PPTC可能會導致產(chǎn)品焊后電阻超出規(guī)格。
·某些注塑料、單組份、雙組份固化膠粘劑、硅膠、侵蝕性溶劑污染PPTC材料破壞芯片,需要對注塑料膠料等材料牌號以及應用參數(shù)(如溫度、時間等)進行驗證,以確保產(chǎn)品及工藝的匹配性,確認不會影響PPTC性能之后方可使用。PPTC在充電線端應用中,建議使用PP類材料做內(nèi)膜,禁止使用TPE類與PVC類等材料做內(nèi)膜。
·PPTC貼裝或使用過程中,不建議使用洗板水或其他清洗劑進行清洗。如必須使用,需要驗證各類清洗劑、洗板水以及溶劑的適用性,確認不會影響PPTC性能之后方可使用。已知對PPTC有影響的化學藥品包括但不于醚類、苯類、酮類以及脂類等較強溶解性、破壞性的有機化合物,清洗后將產(chǎn)品放置于敞開的環(huán)境中至少24小時,將殘留的溶劑進行充分的揮發(fā)。
·裝配過程中,避免用暴力砸、擠、壓、拉、扭、刺等方式作用PPTC本體,以免引起PPTC 性能衰減。
·PPTC元件是為電路中偶爾出現(xiàn)的過流而設(shè)計的,不建議用在連續(xù)且持續(xù)過流的電路中。
·大容SMD PPTC濕敏等級為2級,為密封包裝??蛻羧缭趲齑嬷邪l(fā)現(xiàn)有包裝破損的,立即將產(chǎn)品隔離處理;使用時如有余料,需恢復之前包裝狀態(tài),做密封保存,否則會影響產(chǎn)品性能導致焊后電阻越規(guī)格。
·產(chǎn)品廢棄時,可按照一般電子廢棄物處理,具體材料組成可參見MSDS
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