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  • 參數(shù)資料
    型號: MJE15030AN
    廠商: ON SEMICONDUCTOR
    元件分類: 功率晶體管
    英文描述: 8 A, 150 V, NPN, Si, POWER TRANSISTOR
    封裝: PLASTIC, TO-220AB, 3 PIN
    文件頁數(shù): 14/61頁
    文件大小: 408K
    代理商: MJE15030AN
    Surface Mount Package Information and Tape and Reel Specifications
    4–4
    Motorola Bipolar Power 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 remem-
    bers these profiles from one operating session to the next.
    Figure 5 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
    Figure 4. Typical Solder Heating Profile
    DESIRED CURVE FOR HIGH
    MASS ASSEMBLIES
    相關(guān)PDF資料
    PDF描述
    MJE16004DW 5 A, 450 V, NPN, Si, POWER TRANSISTOR
    MJE16004BU 5 A, 450 V, NPN, Si, POWER TRANSISTOR
    MJE16004BC 5 A, 450 V, NPN, Si, POWER TRANSISTOR
    MJE16004BA 5 A, 450 V, NPN, Si, POWER TRANSISTOR
    MJE16004AJ 5 A, 450 V, NPN, Si, POWER TRANSISTOR
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