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    參數(shù)資料
    型號: MJE18002BC
    廠商: ON SEMICONDUCTOR
    元件分類: 功率晶體管
    英文描述: 2 A, 450 V, NPN, Si, POWER TRANSISTOR
    封裝: PLASTIC, TO-220AB, 3 PIN
    文件頁數(shù): 17/65頁
    文件大小: 409K
    代理商: MJE18002BC
    4–3
    Surface Mount Package Information and Tape and Reel Specifications
    Motorola Bipolar Power Transistor Device Data
    Prior to placing surface mount components onto a printed
    circuit board, solder paste must be applied to the pads.
    Solder stencils are used to screen the optimum amount.
    These stencils are typically 0.008 inches thick and may be
    made of brass or stainless steel. This is not the case with the
    DPAK and D2PAK packages. If a 1:1 opening is used to
    screen solder onto the drain pad, misalignment and/or “tomb-
    stoning” may occur due to an excess of solder. For these two
    packages, the opening in the stencil for the paste should be
    approximately 50% of the tab area. The opening for the leads
    is still a 1:1 registration. Figure 3 shows a typical stencil for
    the DPAK and D2PAK packages. The pattern of the opening
    in the stencil for the drain pad is not critical as long as it
    allows approximately 50% of the pad to be covered with
    paste.
    Figure 3. Typical Stencil for DPAK and
    D2PAK Packages
    SOLDER PASTE
    OPENINGS
    STENCIL
    SOLDERING PRECAUTIONS
    The melting temperature of solder is higher than the rated
    temperature of the device. When the entire device is heated
    to a high temperature, failure to complete soldering within a
    short time could result in device failure. Therefore, the
    following items should always be observed in order to mini-
    mize the thermal stress to which the devices are subjected.
    Always preheat the device.
    The delta temperature between the preheat and soldering
    should be 100
    °C or less.*
    When preheating and soldering, the temperature of the
    leads and the case must not exceed the maximum
    temperature ratings as shown on the data sheet. When
    using infrared heating with the reflow soldering method,
    the difference should be a maximum of 10
    °C.
    The soldering temperature and time should not exceed
    260
    °C for more than 10 seconds.
    When shifting from preheating to soldering, the maximum
    temperature gradient shall be 5
    °C or less.
    After soldering has been completed, the device should be
    allowed to cool naturally for at least three minutes.
    Gradual cooling should be used since the use of forced
    cooling will increase the temperature gradient and will
    result in latent failure due to mechanical stress.
    Mechanical stress or shock should not be applied during
    cooling.
    * Soldering a device without preheating can cause excessive
    thermal shock and stress which can result in damage to the
    device.
    * Due to shadowing and the inability to set the wave height to
    incorporate other surface mount components, the D2PAK is
    not recommended for wave soldering.
    相關(guān)PDF資料
    PDF描述
    MJE18004BD 5 A, 450 V, NPN, Si, POWER TRANSISTOR
    MJE18004BA 5 A, 450 V, NPN, Si, POWER TRANSISTOR
    MJE18004AS 5 A, 450 V, NPN, Si, POWER TRANSISTOR
    MJE18004DW 5 A, 450 V, NPN, Si, POWER TRANSISTOR
    MJE18004BG 5 A, 450 V, NPN, Si, POWER TRANSISTOR
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