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Our customers
find it useful in ordering mercury
contactors and relays if they can
interpret part numbers from various
manufacturers. In the near future
we will be expanding this
page to accommodate as many kinds
of part numbers as possible. Below
we have outlined what has become an
unofficial standard for these
numbers.
Example :
235NO-120AH
First number : "2" = The amount of
poles (max of three).
Second two or three numbers : "35"
= Amperage Rating.
Two Letters denote output /contact
type :
N.O. =
Normally Open
N.C. =
Normally
Closed
The last part of the part number
denotes the coil voltage :
120AH =
120
Volts AC
24VDC =
24 Volts DC
Note:
The above example assumes at least
a two pole relay. If the relay in
question is a single pole, then the
first number would drop off.
Leaving 35NO-120AH denoting a
single pole relay.
Note:
If the part number begins with 4
numbers, then this normally denotes
a relay in the family of 100 Amp or
above.
Example would be 3100NO-120AH. This
would be a 3 pole, 100 Amp relay
contactor. Again 100NO-120AH would
be a single pole, 100 Amp relay. |
