Questions about a relays

Discussion in 'General Electronics Chat' started by atferrari, Sep 23, 2012.

  1. atferrari

    Thread Starter AAC Fanatic!

    Jan 6, 2004
    2,648
    762
    My questions about this particular DPDT 5V relay:

    a) Specs for AC and DC do not look very consistent. Why?

    b) What if I use it to switch a load on 30V DC with 850 mA (maximum)?

    c) I come from reading Wikipedia but I am not sure about this:

    NC (normally closed) is the contact that stays closed when the coils is NOT energized?
    NO (normall open) is the contact that stays open when the coil is NOT energized?

    Thanks for any help and the time you spent here.
     
  2. bertus

    Administrator

    Apr 5, 2008
    15,647
    2,346
    Hello,

    When you take a look in the datasheet this graph will show up:

    [​IMG]

    I have also attached the full datasheet.

    There are three contacts in a throw over switch
    CO or COM or COMMON , in the drawing shown as C1 and C2 for the DPDT setup.
    NC or Normal Closed, in the drawing shown as B1 and B2 for the DPDT setup.
    NO or Normal Open, in the drawing shown as A1 and A1 for the DPDT setup.
    This is the situation when the relays is NOT energized.
    When the relays is energized, the contacts between C1 and B1 will be opened and C1 and A1 will be closed.
    When the relays is energized, the contacts between C2 and B2 will be opened and C2 and A2 will be closed.

    [​IMG]

    Bertus
     
    Last edited: Sep 23, 2012
  3. vk6zgo

    Active Member

    Jul 21, 2012
    677
    85
    I hope this helps.
     
  4. atferrari

    Thread Starter AAC Fanatic!

    Jan 6, 2004
    2,648
    762
    Hola Bertus and vk,

    Gracias. Clear enough!
     
Loading...