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What is a rectifier fuse?

Discussion in 'Electronic Repair' started by David Nugent, Apr 22, 2004.

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  1. David Nugent

    David Nugent Guest

    I'm trying to work on a piece of lab instrument that needs to have some
    fuses replaced.

    They appear to be ceramic type fuses.. The manual states that these must be
    "rectifier type fuses". Regular fuses not recommended.

    Can someone tell me what a rectifier fuse is? I've never heard of these
    until now and my search on the web hasn't yielded
    much useful information.

  2. Ken Weitzel

    Ken Weitzel Guest


    I kinda expect to be corrected, but I'm going to
    tell you that they refer only to the fact that
    they're fast blow fuses (as opposed to slow blow)

    Take care.

  3. Art

    Art Guest

    Could also be physical characteristic, that they physically appear to be a
    rectifier, resistor, etc. rather than a glass type fuse device. ?? Like
    some of the "chem fuses or pico fuses" now being used.
  5. Ross Herbert

    Ross Herbert Guest

    Since a rectifier is usually followed by a fairly large filter
    capacitor of some 1000's of uF, it would be usual to fit a delay or
    anti-surge type fuse (T suffix). You also say the original is a
    ceramic (opaque white cylinder) fuse. This always indicates a fuse
    with high current breaking capacity and they are usually associated
    with a delayed function.
  6. Aidan Grey

    Aidan Grey Guest

    I don't know, but I would guess that the fuse may have to be rated to
    operate across a power line. That is, its voltage rating is enough to
    the line power coming in.

    If so, any replacement must be rated for a minimum of 230 VAC.

    Aidan Grey
  7. Ken / Dave

    They may be HRC (high rupture current) fuses,
    often white or filled with white "sand", and
    with "H" stamped on the end cap. These are
    similar to "M" (microwave) fuses. The point
    is that if a rectifier goes short ciruit, it
    really goes short circuit. The current can
    explode a normal fast blow fuse, which is,
    erm, unpleasant.

    That's my interpretation. Now someone might
    like to put me right....

  8. Guest
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