Eaton Freedom Base Auxiliary C...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$106.73
Eaton Freedom Base Auxiliary Contact for Starters and Contactors

Eaton Freedom Base Auxiliary Contact for Starters and Contactors

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Model: C320KGS31

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

$106.73
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Eaton Freedom Base Auxiliary Contact

The Eaton Freedom base auxiliary contact is a NEMA/IEC accessory engineered for use on Eaton Freedom Series starters and contactors. Sized for NEMA sizes 4-5 and IEC sizes P-S, this base auxiliary contact delivers dependable auxiliary switching in motor control and protection applications. Measuring 3.3 in wide, 3.3 in high, and 4.4 in in length/depth, it is purpose-built to mount directly onto compatible Freedom Series starters and contactors without modification. Backed by a 1 year manufacturer warranty and cUL Listed for code compliance, this auxiliary contact is built to support demanding motor control and protection systems in commercial and industrial environments.

Key Features

  • Type: Base auxiliary contact designed for use on Eaton Freedom Series starters and contactors.
  • Size Compatibility: Sized for NEMA sizes 4-5 and IEC sizes P-S for precise fit and reliable function.
  • Auxiliary Switching: Provides auxiliary switching and interlock capability for motor control and protection circuits.
  • Compact Dimensions: 3.3 in product width, 3.3 in product height, and 4.4 in product length/depth for straightforward panel fit.
  • Series: Part of Eaton's Freedom Series motor control and protection product line.
  • Warranty: Backed by a 1 year manufacturer warranty for added assurance.
  • Compliance: cUL Listed construction supports code-compliant motor control installations.

Certifications & Compliance

  • cUL Listed

Technical Specifications

  • Product Width: 3.3 in
  • Product Length/Depth: 4.4 in
  • Product Height: 3.3 in
  • Used With: Used on Starters and Contactors
  • Size: NEMA sizes 4 - 5, IEC sizes P - S
  • Type: Base auxiliary contact
  • Series: Freedom
  • Warranty: 1 year
  • Certifications: cUL Listed

Typical Applications

  • Motor Control and Protection Panels
  • Starter and Contactor Assemblies
  • Industrial and Commercial Electrical Systems
  • Motor Control Center (MCC) Builds, Upgrades, and Retrofits
  • OEM Panel Building and Machine Control
  • Auxiliary Interlock and Signaling Circuits

Why Eaton?

Eaton's Freedom Series auxiliary contacts are engineered for dependable, code-compliant performance in motor control and protection systems relied on across commercial and industrial facilities. With cUL Listed certification, precise NEMA/IEC size compatibility, and a 1 year manufacturer warranty, this base auxiliary contact delivers the consistent auxiliary switching performance electrical professionals expect from Eaton when building or maintaining starters and contactors.

Variant Specifications

Contact ConfigurationSKU
NO circuitC320KGS31
NC circuitC320KGS42

Manufacturer Resources

Product Specs

Used with:
Used on Starters and Contactors
Listing:
cUL
Department:
Electrical
Series:
Freedom
Product Type:
Auxiliary Contact
Certifications:
cUL Listed
Warranty:
1 year
Product Group:
Motor Control & Automation
Product Subgroup:
Motor Starters & Contactors

Eaton C320KGS31 – Frequently Asked Questions

1) What is the difference between Eaton C320KGS31 and C320KGS42?
Contact configuration is the only difference. C320KGS31 gives you a normally open (NO) circuit, C320KGS42 a normally closed (NC) circuit. Pick NO when the auxiliary circuit should close as the contactor pulls in (seal-in, run indication), NC when you need the circuit to open on pickup (interlocking, stopped-state signaling).
2) Can I use one of these to add both a NO and an NC auxiliary circuit?
No. Each C320KGS base auxiliary contact carries a single circuit, either NO (C320KGS31) or NC (C320KGS42). If your control scheme needs both, order one of each.
3) Can I use an ABB OA1G10 auxiliary contact in place of an Eaton Freedom base auxiliary contact?
No. The ABB OA1G10 is a 1-NO auxiliary contact switch for ABB OT and OS disconnect switches, so it addresses a disconnect handle position, not a motor starter. The Eaton C320KGS is a base auxiliary contact for Eaton Freedom Series starters and contactors in NEMA sizes 4-5 and IEC sizes P-S. They signal different devices and do not interchange.
4) I need contact status off a circuit breaker, not a starter - is the Eaton C320KGS the right part?
No. The Eaton C320KGS is a base auxiliary contact that mounts on Eaton Freedom Series starters and contactors. For breaker status signaling, the Square D ComPact NSXm auxiliary contact provides OF/SD circuit breaker status. Use the breaker-mounted accessory for breaker position and trip indication, and the Freedom base auxiliary contact for starter and contactor interlock and signaling circuits.
5) What is the closest equivalent to the Eaton C320KGS auxiliary contact if the panel uses ABB contactors instead of Eaton Freedom?
The Eaton C320KGS base auxiliary contact is built to mount directly on Eaton Freedom Series starters and contactors, so it is not a fit on an ABB line device. For contactor and relay work on ABB gear, the ABB CR305X series auxiliary contact is the corresponding accessory. Keep the two lines separate: pick the auxiliary contact that matches the brand and series of the starter or contactor already in the panel, then choose the contact circuit you need.
6) How much panel space does the Eaton Freedom base auxiliary contact take up?
It measures 3.3 in wide, 3.3 in high, and 4.4 in in length/depth. Allow for that depth behind the starter face when you are laying out a tight MCC bucket or control panel.
7) What other brands of auxiliary contact could I use instead of the Eaton Freedom base contact?
For contactors and relays on the ABB side, the CR305X Series auxiliary contact covers that role. Square D's Type S isolated alarm contact kit is a different animal, an isolated alarm circuit rather than a general auxiliary. Bussmann's BAC Series handles a 1A to 12A range on fuse-related signaling. None of them mount on a Freedom starter, though, so if you are working on Eaton Freedom NEMA 4-5 or IEC P-S gear, stay with the C320KGS.
8) What auxiliary contact should I use for blown fuse indication rather than starter interlock?
The Eaton C320KGS base auxiliary contact is a Freedom Series starter and contactor accessory for auxiliary switching and interlock. For fuse-related indication, the Bussmann BAC series auxiliary contact covers a 1A to 12A amp range and is the fuse-side accessory. They are separate items in a motor control panel and one does not replace the other.
9) Is the Square D 9999SO4 alarm contact kit a substitute for the Eaton C320KGS?
They are not interchangeable. The Square D 9999SO4 is a Type S isolated alarm contact kit, built as an isolated alarm circuit accessory on Square D Type S devices. The Eaton C320KGS is a base auxiliary contact sized for Eaton Freedom Series starters and contactors in NEMA sizes 4-5 and IEC sizes P-S, offered with either an NO circuit as C320KGS31 or an NC circuit as C320KGS42. If your existing gear is Freedom, stay with the C320KGS and select the circuit your control scheme calls for.
10) What is a base auxiliary contact actually used for on a motor starter?
It adds a switched auxiliary circuit that follows the contactor's state, used for seal-in and holding circuits, electrical interlocks between contactors, run or stopped indication, and feeding PLC inputs. On the Eaton Freedom line it mounts to the base of the starter or contactor rather than to the side or front.
How fast can I get the Eaton C320KGS31 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 C320KGS31 come with a warranty?
Absolutely. The Eaton C320KGS31 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 C320KGS31?
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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