|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. (Also
See "Tilt Switch" part number page)
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.C. = Normally Closed
The last part of the part number denotes the coil voltage :
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
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.
Page links for buying online are below.