The suffixed variant of the 1800 A DC contactor found in Ross Hill SCR bays — same frame, different coil voltage. That difference is the whole reason this page exists.
Independent sourcing, not an authorized distributor. Eaton, Cutler-Hammer, Ross Hill, NOV, and other manufacturer names and part numbers are used for reference only. Supplied as new-surplus, used-tested, or reconditioned, with condition disclosed before sale.
| Manufacturer part number | 6702ED584-2 |
|---|---|
| Manufacturer | Eaton / Cutler-Hammer |
| EI reference | EI-6702ED584-2 |
| Type | DC contactor |
| Rating on file | Same 1800 A frame as the 6702ED584, listed by distributors with a 115 VDC coil |
| Base number | 6702ED584 — 1800 A, 74 VDC coil |
| Found in | Ross Hill / NOV SCR bays |
| Condition | New-surplus, used-tested, reconditioned |
6702ED584-2 · 6702ED584 2 · 6702ED-584-2 · 6702 ED 584 2 · 6702ED5842 · Cutler-Hammer 6702ED584-2 · Eaton 6702ED584-2 · 1800 amp DC contactor 115 VDC coil · Ross Hill SCR bay contactor · EI-6702ED584-2
The coil voltage. The base 6702ED584 is recorded as 1800 A with a 74 VDC coil. The -2 is recorded as the same 1800 A frame, listed by distributors with a 115 VDC coil.
The frame and the current rating are the parts of the number people read. The coil voltage is the part that decides whether the contactor works in your bay. It is a one-character difference on a nine-character number and it is the single most expensive thing to get wrong on this family.
A contactor with the wrong coil voltage will either fail to pull in or run hot and fail early. Neither failure mode announces itself as a coil problem, which is why it costs people a second contactor before they find it.
Under-driven, the coil does not develop enough force to seat the contacts — you get a contactor that will not pull in, or one that chatters and drops out under load. Over-driven, it seats fine and cooks. Read the whole number off the nameplate, including any suffix, and tell us the coil voltage your bay actually supplies.
| Number | What is recorded | Note |
|---|---|---|
| 6702ED584-2 | Same 1800 A frame, listed by distributors with a 115 VDC coil. | this page |
| 6702ED584 | DC contactor, 1800 A, 74 VDC coil. Catalogued by Ross Hill as 0401-0021-00. | Different coil voltage |
| 6702ED587-2 | DC contactor, 3000 A, 74 VDC. | Different current rating |
| 6702ED621-2 | DC contactor, 1000 A, 125 VDC, reversing. | Different rating and coil |
| 0100-0389-02 | Ross Hill 1800/C contactor, 1800 A 74 VDC. A Ross Hill-built part, not an Eaton one. | Same headline rating, different manufacturer |
Note the trap at the bottom of the table. Two different 1800 A contactors turn up in this equipment from two different manufacturers. Matching ratings do not make them interchangeable — check the manufacturer name on the nameplate, not just the rating.
An Eaton / Cutler-Hammer part. Ross Hill specified the 6702ED family into its SCR bays and catalogued the base number under a Ross Hill number, 0401-0021-00, but Ross Hill did not build it.
That has a practical consequence worth knowing: the part has a life independent of the Ross Hill parts chain, and a search against the Eaton number will usually turn up more than a search against the Ross Hill number. If you have only been quoted against a Ross Hill number, try the Eaton number.
| What you are seeing | What it usually indicates |
|---|---|
| Contactor will not pull in | Coil, coil voltage, or control circuit — verify the coil rating first |
| Contactor chatters or drops out under load | Coil supply or worn contacts |
| Heavy pitting or welding on the tips | Contacts at end of life, or an interruption duty problem |
| Replacement fitted and it runs hot | Wrong coil voltage variant — check the suffix |
Starting from a symptom — a gate firing pulse failure, a misfire, phase loss, one leg dead? The SCR Drive Fault Finder maps what you are seeing to the suspect module and part number.
We verify the full number, including suffix, and the coil voltage against the physical unit before quoting, and send photos of the nameplate on the unit being offered. On this family the nameplate photo is worth more than the purchase record.
These are the details that let us identify the right unit instead of guessing at it.
Supplied as new-surplus (unused, from the secondary market), used-tested, or reconditioned, with condition disclosed before sale and photos on request. Availability on legacy Ross Hill and NOV equipment changes constantly — send the number and we will tell you what we can actually find.
Condition always disclosed before sale. Photos on request. Same-day response on most requests.
Condition disclosed before sale. Nameplate photos on request.