COMMON SENSE ANSWERS FOR THE WELDING FABRICATION INDUSTRY
MILLER® DIRECT REPLACEMENT CONTACTORS
On this page you will find the most common mechanical contactors used on Miller Electric® power supplies. T
If your contactor is not here contact us as soon as possible for a quote.
When used in a welding machines they turn on (or off) the welding power of the machine. A welder will tell you the lead is "hot" (has weld power available or cold (won't arc).
The contactor is an electro-mechanical, remotely controlled switch. When used to control a welding power supply, it only degrades, when it "opens" under load. When the arc is broken, with the power supply, the contacts (inside the contactor) arc as they open. Eventually they burn black and will not conduct or they will weld together.
Most machines break the input AC line. Either a 2-Pole (Single Phase) or 3-Pole (Three Phase) are the most common contactors normally found in the field. Note: Some machines use a 4-Pole contactor, the Linde® UCC-305 Tig power supply is the most common. The UCC-305 was one of the most dependable Tig power supplies ever made. The input power is single phase, but the contactor is a 4-Pole, 50 amps (OEM ONLY) unit!
Some machines break the power between the the main power transformer and the diode bridge. This is normally done for design reasons (Miller® CP-200 & CP-300 are the most common examples).
Many older Hobart® & Lincoln® power supplies used a contactor in the "welding circuit". They actually break the welding power output. These contactors were normally large with very large contacts. Many newer Mig power supplies (Esab® Migmaster® 250, 251, & Millermatic ®200) use a three pole contactor, with the three legs connected in parallel, to break the welding power. This is a very economical design, and very easy to replace.
3 Pole/ 75 Amp/ 120 VAC Coil Contactor.
This contactor is a direct replacement for Miller® P/N: 177551. Used in the Miller FC6E,FC65E, Spectrum ®750, Spectrum® 1000, Spectrum® 1500, MP-45, MP-65E, Dialarc® HF,CP-300,& FC-65, and any application that would require a 75 amp 3 pole 120 VAC contactor.
Pricing: Miller® OEM Aftermarket (Identical If Not Superior To OEM)
MILLER® REPLACEMENT CONTACTOR FOR SP-32 SERIES WIREFEEDFERS
Miller OEM P/N: 110361
Pricing: Miller® OEM Aftermarket (Identical If Not Superior To OEM)
CLICK ON THE ROTATING @ AND SEND US A MESSAGE!
CLICK ON THE CHAIN TO RETURN TO OUR HOME PAGE
"MILLER ELECTRIC" is a registered trademark and property of Illinois Tool Inc .Weldmart-Online is in no way affiliated with the Illinois Tool Works Company. References to the named torches, machines, and part numbers are for the convenience of our customers only. This web page is copyrighted by Weldmart-Online and reproduction In any form is prohibited by law.