Eaton C320 Auxiliary Contact, ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$95.39
Eaton Auxiliary Contact Heavy-Duty Pilot Rated 10A 600VAC for 15-75A Definite Purpose Contactors

Eaton C320 Auxiliary Contact, Heavy-Duty Pilot Rated 10A 600VAC

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Model: C320KG2

In Stock (leaves warehouse same day if ordered before 3pm ET)

$95.39
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Eaton C320 Auxiliary Contact, Heavy-Duty Pilot Rated 10A 600VAC

The Eaton C320 Auxiliary Contact is a heavy-duty pilot rated accessory built for 10A at 600VAC performance, engineered specifically for use with 15-75A definite purpose contactors. This professional-grade component adds extra switching contacts to your control circuit, giving panel builders and electricians the flexibility to expand contactor functionality without redesigning the entire control scheme. As a dedicated accessory for Eaton definite purpose contactor assemblies, it is purpose-built to slot directly into existing control circuit layouts. Backed by Eaton's reputation for dependable electrical control components, this auxiliary contact is built to perform reliably in demanding commercial and industrial environments.

Key Features

  • Heavy-Duty Pilot Rating: Rated 10A at 600VAC for dependable switching performance in control circuit applications.
  • Definite Purpose Compatibility: Engineered for direct use with 15-75A definite purpose contactors for seamless system integration.
  • Professional Grade Construction: Built to Eaton's exacting manufacturing standards for long-term reliability in commercial and industrial settings.
  • Enhanced Control Functionality: Adds supplemental switching contacts, expanding control circuit capability and overall system flexibility.
  • Accessory Component: Designed specifically as an add-on accessory for Eaton definite purpose contactor assemblies rather than a standalone device.
  • Simplified Integration: Mounts directly to compatible Eaton definite purpose contactors without requiring separate control circuit rewiring.
  • Proven Eaton Quality: Manufactured by a trusted leader in electrical control components for consistent, code-ready performance.

Technical Specifications

  • Rating: Heavy-Duty Pilot Rated, 10A at 600VAC.
  • Compatibility: For use with 15-75A Definite Purpose Contactors.
  • Product Details: Accessory component for Definite Purpose contactors.
  • Special Features: Used with Definite Purpose contactors.

Typical Applications

  • Commercial HVAC Control Systems
  • Industrial Motor Control Centers
  • Manufacturing Process Control
  • Building Automation Systems
  • Electrical Panel Assemblies
  • Professional Control Circuit Upgrades

Why Eaton?

Eaton auxiliary contacts are engineered to the same exacting standards as the definite purpose contactors they support, delivering a heavy-duty 10A, 600VAC pilot rating that holds up under demanding commercial and industrial duty cycles. For electricians and panel builders who need dependable, code-ready control circuit expansion, the Eaton C320 Auxiliary Contact is a trusted way to add switching capability without compromising system reliability. Choosing genuine Eaton accessories also helps ensure long-term compatibility with your definite purpose contactor assemblies.

Manufacturer Resources

Product Specs

Product Type:
Auxiliary Contact
Amperage Rating:
10A
Voltage Rating:
600VAC
Department:
Electrical
Product Group:
Wiring Devices

Eaton C320KG2 – Frequently Asked Questions

1) What contactors does the Eaton C320KG auxiliary contact mount to?
The C320 auxiliary contact is built for Eaton definite purpose contactors in the 15-75A range. It mounts directly to the contactor body and picks up its actuation from the contactor's armature, so you are not rewiring the control scheme to add a contact. It is an add-on accessory, not a standalone switch, so it does nothing on its own bench-side.
2) Which NO/NC contact arrangements can I get on the Eaton C320KG?
Five circuit arrangements are offered: 1NO, 1NC, 1NO-1NC, 2NO and 2NC. Pick by what the control circuit needs, a normally open contact to energize a pilot light or interlock when the contactor pulls in, a normally closed contact to drop a circuit out on pull-in, or the 1NO-1NC when you need both from one accessory. Example part numbers: C320KG1 (1NO), C320KG2 (1NC), C320KG3 (1NO-1NC), C320KG4 (2NO), C320KG5 (2NC).
3) What is the difference between the standard pressure plate and quick connect terminal versions of the C320KG?
Terminal style is the second thing you specify. Standard pressure plate versions take a stripped conductor under a clamping plate, which is what most panel builders land control wire on. The quick connect versions add spade terminals alongside the pressure plate, so you can push on a pre-made control harness instead of stripping and landing each lead, common in HVAC unit wiring. Same contact ratings either way. The quick connect parts run C320KG11 through C320KG15; the pressure plate only parts are C320KG1 through C320KG5.
4) Can I switch a 120V control circuit and a 480V circuit with this auxiliary contact?
Yes on both. The C320 contact carries a heavy-duty pilot rating of 10A at 600VAC, so anything at or below 600 volts AC is within rating, which covers the usual 24V, 120V, 208/240V and 480V control voltages. The 10A rating is generous for pilot duty, so contactor coils, relay coils, pilot lights and PLC inputs are all comfortably inside it.
5) Will the Eaton C320KG fit on a circuit breaker or a disconnect switch?
No. The C320 is dedicated to Eaton definite purpose contactors rated 15-75A and will not mount to a breaker or a disconnect. For breaker status contacts, the Square D ComPact NSXm auxiliary contact handles OF/SD circuit breaker status, and for a rotary disconnect the ABB OA1G10 is a 1-NO auxiliary contact switch made for OT/OS disconnects. Fuse-holder status is a different animal again, that is where the Bussmann BAC series sits.
6) Can an Eaton C320 auxiliary contact be used to signal circuit breaker status?
No. The Eaton C320 auxiliary contact is an accessory that mounts on 15-75A definite purpose contactors to add switching contacts to a control circuit, rated 10A at 600VAC. For breaker status indication, the Square D ComPact NSXm auxiliary contact provides OF/SD circuit breaker status signaling on NSXm breakers. Those are different host devices, so the C320 is not a substitute for a breaker status contact.
7) I need an auxiliary contact for a disconnect switch, not a contactor. What should I use instead of the Eaton C320?
The Eaton C320 is built for 15-75A definite purpose contactors, so it will not fit a disconnect. For an OT or OS disconnect switch, the ABB OA1G10 is a 1-NO auxiliary contact switch made for OT/OS disconnects. Choose the C320 when the host device is an Eaton definite purpose contactor and the OA1G10 when it is an ABB disconnect.
8) I need two extra contacts on one contactor. Do I order two C320KG units or one 2NO?
If you need two contacts of the same type, order the single 2NO (C320KG4) or 2NC (C320KG5) unit, it gives you both poles in one accessory mounted in one position. Order the 1NO-1NC (C320KG3) if you need one of each. Stacking two separate single-contact units is only worth doing when your contactor has mounting positions to spare and you want mixed terminal styles.
9) Is there a non-Eaton auxiliary contact I can use instead on a general purpose contactor or relay?
For contactors and relays outside the Eaton definite purpose line, the ABB CR305X series auxiliary contact is the cross-brand option we carry for that duty. Keep in mind auxiliary contacts are brand and frame specific, they clip to a particular contactor body, so an ABB block does not go on an Eaton definite purpose contactor and the C320 does not go on an ABB one. Match the accessory to the contactor you actually have.
10) Can I use this auxiliary contact to run a pilot light or feed a BAS input on an HVAC unit?
That is exactly the job. A normally open contact from the C320 closes when the contactor pulls in, so it gives you proven-run feedback for a pilot light, a building automation input, or an interlock to a second piece of equipment, all without touching the power circuit. Typical uses are commercial HVAC control, motor control centers, building automation and panel assemblies. At 10A, 600VAC pilot rating there is plenty of headroom for a lamp or a low-current input.
11) I want an alarm contact that tells me a device tripped, not that it energized. Is the C320KG the right part?
No. The C320 follows the contactor, it tells you the contactor is pulled in, not that anything faulted. For trip or alarm indication you want a dedicated alarm contact, such as the Square D Type S isolated alarm contact kit, or for breaker status the Square D ComPact NSXm OF/SD contact. Use the C320 when you need a run confirmation or an extra control interlock off an Eaton definite purpose contactor.
12) Do I have to rewire the control circuit to add a C320 auxiliary contact to an existing contactor?
No separate control circuit rewiring is needed. The contact mounts directly to a compatible Eaton definite purpose contactor and is mechanically driven by it, so the only wiring is the two control leads you land on the new contact itself. That keeps a field retrofit to a short job, useful when a panel needs one more interlock and you do not want to redesign the scheme.
13) What is the difference between the Eaton C320 auxiliary contact and a Square D Type S isolated alarm contact kit?
The Square D Type S isolated alarm contact kit is an alarm contact kit for Type S devices, used to bring out an isolated alarm signal. The Eaton C320 adds general control switching poles to a definite purpose contactor and is offered in 1NO, 1NC, 1NO-1NC, 2NO and 2NC arrangements rated 10A at 600VAC. If the requirement is a simple added NO or NC pole on an Eaton definite purpose contactor, the C320 is the part; an isolated alarm output on a Type S device calls for the Square D kit.
14) For a 600V control circuit, does the Eaton C320 auxiliary contact carry a higher voltage rating than the comparable auxiliary contacts?
The Eaton C320 auxiliary contact is rated 600VAC at 10A, so it suits control circuits operating up to 600V. Among the comparable contacts, the Bussmann BAC series is described by its 1A to 12A amp range, and the ABB OA1G10 by its single normally open circuit for OT/OS disconnects. If the deciding factor is a stated 600VAC control voltage on an Eaton definite purpose contactor, the C320 is the direct answer.
How fast can I get the Eaton C320KG2 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Eaton C320KG2 come with a warranty?
Absolutely. The Eaton C320KG2 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Eaton C320KG2?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
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