DP Contactors

✓ Authorized Siemens distributor

✓ Hard-to-find and manufacturer-specific equipment

✓ Since 1972

DP contactors take the brunt of every start and stop on a compressor or a pump. Spares have come out of Bud Ferguson's Industrial Control & Supply Inc. since 1972. Service companies across the fifty states order DP contactors from a single stocked warehouse. Siemens-authorized distribution covers the control side, with the definite purpose range included.

Return your equipment to service with DP contactors

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Applications DP Contactors Were Designed Around

Packaged equipment like rooftop units and walk-in coolers relies on DP contactors to switch the compressor. Builders of those machines choose a device rated for one job rather than general duty. Selection follows the application, so a unit suits the horsepower and cycle count it was picked for. NEMA-rated devices answer a broad standard instead, which is the difference between the two families. Failure usually starts at the coil rather than the contact faces. Welding across those surfaces or a dropout mid-run shows up as short cycling.

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Amperage, Coil Voltages, and Accessories Kept on Hand

Bulk of the range falls to Class 42 and 45 across our DP contactors. General duty work goes with our electrical contactors instead. Common control voltages from 24 through 480 are all represented. Banks of lamps need Siemens lighting contactors rather than a definite purpose device. Anywhere from one to four poles covers the phases being switched. Accessory kits, auxiliary contacts, and mounting hardware are stocked alongside. Loose coils are held separately from the assemblies they belong to.

Substituting a General Purpose Device

OEM part numbers on DP contactors narrow the choice more than a catalog equivalent suggests. Protected motor circuits require our magnetic starters instead. Footprint matters too, since a swap has to land on the same mounting holes. Looking up an OEM number is routine for our electrical equipment supplier. Part numbers and equipment models both work as a starting point. Guessing at an equivalent risks a device that will not carry the duty cycle.

Return Your Equipment to Service

Warm rooms and idle pumps both trace back to failed DP contactors. Data off the equipment nameplate beats a visual match every time. Coil voltage decides whether a unit pulls in, and horsepower decides whether it holds. Standby stock covers whole assemblies as well as separate coils. Packages leave one warehouse for sites nationwide. Contact us with the nameplate details rather than guessing at the contactor that returns it to service.