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參數資料
| 型號： | MTB2P50ET4 |
| 廠商： | MOTOROLA INC |
| 元件分類： | JFETs |
| 英文描述： | 2 A, 500 V, 6 ohm, P-CHANNEL, Si, POWER, MOSFET |
| 文件頁數： | 10/10頁 |
| 文件大?。?/td> | 273K |
| 代理商： | MTB2P50ET4 |
MTB2P50E
9
Motorola TMOS Power MOSFET Transistor Device Data
TYPICAL SOLDER HEATING PROFILE
For any given circuit board, there will be a group of control
settings that will give the desired heat pattern. The operator
must set temperatures for several heating zones, and a figure
for belt speed. Taken together, these control settings make up
a heating “profile” for that particular circuit board. On
machines controlled by a computer, the computer remembers
these profiles from one operating session to the next. Figure
18 shows a typical heating profile for use when soldering a
surface mount device to a printed circuit board. This profile will
vary among soldering systems but it is a good starting point.
Factors that can affect the profile include the type of soldering
system in use, density and types of components on the board,
type of solder used, and the type of board or substrate material
being used. This profile shows temperature versus time. The
line on the graph shows the actual temperature that might be
experienced on the surface of a test board at or near a central
solder joint. The two profiles are based on a high density and
a low density board. The Vitronics SMD310 convection/
infrared reflow soldering system was used to generate this
profile. The type of solder used was 62/36/2 Tin Lead Silver
with a melting point between 177 –189
°C. When this type of
furnace is used for solder reflow work, the circuit boards and
solder joints tend to heat first. The components on the board
are then heated by conduction. The circuit board, because it
has a large surface area, absorbs the thermal energy more
efficiently, then distributes this energy to the components.
Because of this effect, the main body of a component may be
up to 30 degrees cooler than the adjacent solder joints.
STEP 1
PREHEAT
ZONE 1
“RAMP”
STEP 2
VENT
“SOAK”
STEP 3
HEATING
ZONES 2 & 5
“RAMP”
STEP 4
HEATING
ZONES 3 & 6
“SOAK”
STEP 5
HEATING
ZONES 4 & 7
“SPIKE”
STEP 6
VENT
STEP 7
COOLING
200
°C
150
°C
100
°C
50
°C
TIME (3 TO 7 MINUTES TOTAL)
TMAX
SOLDER IS LIQUID FOR
40 TO 80 SECONDS
(DEPENDING ON
MASS OF ASSEMBLY)
205
° TO 219°C
PEAK AT
SOLDER JOINT
DESIRED CURVE FOR LOW
MASS ASSEMBLIES
100
°C
150
°C
160
°C
170
°C
140
°C
DESIRED CURVE FOR HIGH
MASS ASSEMBLIES
Figure 18.
Typical Solder Heating Profile
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MTB2P50ET4G | 功能描述:MOSFET PFET 500V 2A 6O RoHS:否 制造商:STMicroelectronics 晶體管極性:N-Channel 汲極/源極擊穿電壓:650 V 閘/源擊穿電壓:25 V 漏極連續(xù)電流:130 A 電阻汲極/源極 RDS（導通）:0.014 Ohms 配置:Single 最大工作溫度: 安裝風格:Through Hole 封裝 / 箱體:Max247 封裝:Tube |
| MTB306D | 功能描述:撥動開關 3PDT TOGGLE SWITCH Long Bat Actuator RoHS:否 制造商:C&K Components 觸點形式:DPDT 開關功能:ON - ON - ON 電流額定值: 電壓額定值 AC:20 V 電壓額定值 DC:20 V 功率額定值:0.4 VA 端接類型:V-Bracket 安裝風格: 端子密封:Epoxy 觸點電鍍:Gold 照明:Not Illuminated |
| MTB306D04 | 制造商:TE Connectivity 功能描述:Switch Toggle ON None ON 3PDT Bat Toggle Wire Lug 6A 250VAC 28VDC Panel Mount with Threads |
| MTB30HA | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Full-Size (7.3mm or 4.7mm height) |
| MTB30HAM | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Full-Size (7.3mm or 4.7mm height) |
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