I bought a Relay and....

Discussion in 'General Electronics Chat' started by mik3ca, Nov 18, 2008.

  1. mik3ca

    Thread Starter Active Member

    Feb 11, 2007
    after researching wikipedia, they claim that a SPDT relay has 5 pins to it. Mine on the other hand has six pins.

    The packaging states the following about it: "5VDC SPDT Relay 44.7mA 120 ohm coil 3A@120VAC UL"
    and it was packaged by Mode Electronics, and the part number is 50-330-1.

    I did discover (through low-voltage experimentation) that the resistance between the middle two pins is close to zero in all cases, so that makes me think that I'm using the coil..

    Does anyone know the pinout for such a relay?
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    If you have a meter, look for the 120 ohms between two pins. That will be the coil. Find two pins that check short with no power applied - they should be the NC and common. Put power on the coil and check from one to those pins to one of the others. When ypu find another short, it should be the common and NO contact. Remove power and verify common to NC.
  3. SgtWookie


    Jul 17, 2007
  4. mik3ca

    Thread Starter Active Member

    Feb 11, 2007
    thanks a lot :)