Eaton Snap Switch Side-Mounted...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$48.03
Eaton Snap Switch Side-Mounted Auxiliary Contact, 1NO-1NC, Open Enclosure with Metal Mounting Plate

Eaton Snap Switch Side-Mounted Auxiliary Contact, 1NO-1NC, Open Enclosure with Metal Mounting Plate

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Model: C320SNP11

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

$48.03
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Eaton Snap Switch Side-Mounted Auxiliary Contact, 1NO-1NC, Open Enclosure with Metal Mounting Plate

The Eaton Snap Switch Side-Mounted Auxiliary Contact is a side-mounted accessory designed to add a 1 NO-1 NC contact configuration to compatible Eaton contactors rated 15-75A. It features an open enclosure with a metal mounting plate for straightforward installation onto the contactor body. This auxiliary contact provides an additional signaling or interlocking point for control circuit wiring in industrial and commercial motor control applications, and is backed by Eaton engineering to support consistent, dependable performance in the field.

Key Features

  • Contact Configuration: 1 NO, 1 NC auxiliary contact arrangement for flexible control wiring and additional signaling capability.
  • Side Mounting: Mounts to the side of the contactor for easy field installation without disturbing existing main wiring or terminations.
  • Open Enclosure: Open construction paired with a metal mounting plate for secure, stable attachment to the contactor body.
  • Contactor Compatibility: Purpose-built for use with 15-75A Eaton contactors only, ensuring proper fit and function.
  • Accessory Type: A snap switch design auxiliary contact accessory intended to expand contactor functionality.
  • Field-Ready Design: Simplifies retrofits and upgrades on existing Eaton contactor installations without major rewiring.
  • Warranty: Backed by a 1 year manufacturer warranty for added assurance.

Technical Specifications

  • Warranty: 1 year
  • Product Type: Switch
  • Department: Electrical
  • Type: Accessory
  • Catalog Notes: For 15-75A Contactors Only
  • Mounting: Side
  • Contact configuration: 1 NO, 1 NC
  • Enclosure: Open with metal mounting plate

Typical Applications

  • Motor Control Centers and Starter Panels
  • Contactor Auxiliary Signaling and Interlocking
  • Industrial and Commercial Control Circuits
  • Contactor Retrofits and Field Upgrades
  • Panelboard and Control Panel Wiring
  • OEM Machine Control Panel Assembly

Why Eaton?

Eaton auxiliary contacts are engineered for reliable integration with Eaton contactor lines, featuring a metal mounting plate for secure side attachment and a 1 NO-1 NC configuration suited to demanding control applications. The open enclosure design keeps installation straightforward for electricians and panel builders working with 15-75A Eaton contactors. Backed by a 1 year warranty, this accessory helps ensure dependable, code-compliant performance in motor control and switching systems where accurate auxiliary signaling is essential.

Manufacturer Resources

Product Specs

Warranty:
1 year
Product Type:
Auxiliary Contact
Catalog Notes:
For 15-75A Contactors Only
Mounting Method:
Side
Contact configuration:
1 NO, 1 NC
Configuration:
1NO-1NC
Department:
Electrical
Product Group:
Motor Control & Automation
Product Subgroup:
Contactors & Relays

Eaton C320SNP11 – Frequently Asked Questions

1) What contact configuration does the Eaton C320SNP11 give me?
One normally open and one normally closed contact, 1NO-1NC. That gives you a single auxiliary point for signaling plus one for interlocking off the same accessory, so a holding circuit and a status light can both be picked up without adding a second device.
2) Can I add an auxiliary contact to an Eaton contactor already wired in a panel without redoing the main terminations?
Yes, that is what the side mount is for. The C320SNP11 attaches to the side of the contactor body on a metal mounting plate, so you work clear of the main power terminations and only pull in your control wiring. It is intended for field retrofits and upgrades on existing Eaton contactor installations.
3) I need an auxiliary contact on a disconnect switch, not a contactor. What should I use instead of the Eaton C320SNP11?
The C320SNP11 is specified for Eaton contactors in the 15-75A range, so it is not the part for a disconnect. For an ABB OT or OS disconnect switch, the ABB OA1G10 is an auxiliary contact switch built for that application, with a single normally open contact rather than the 1 NO, 1 NC pair the Eaton unit provides. Confirm the disconnect frame matches the OA1G10 before ordering.
4) What is the difference between the Eaton C320SNP11 auxiliary contact and the Square D ComPact NSXm OF/SD auxiliary contact?
They attach to different kinds of devices. The Eaton C320SNP11 is a side-mounted snap switch auxiliary contact with a 1 NO, 1 NC arrangement built for Eaton contactors rated 15-75A, so it signals contactor state in a motor control circuit. The Square D LV426950 is a ComPact NSXm auxiliary contact for OF/SD circuit breaker status, meaning it reports breaker position and trip indication on a molded case breaker. If the device in the panel is a contactor, the C320SNP11 is the matching accessory; if it is an NSXm breaker, the ComPact NSXm contact is the one that fits.
5) Is the Eaton C320SNP11 auxiliary contact enclosed, or does it need to go inside a panel?
It is open construction with a metal mounting plate, not a sealed device. Mount it inside an enclosure or control panel where the contactor itself is housed. For motor control centers, starter panels and OEM machine control panels that is the normal arrangement.
6) Is an auxiliary contact for a contactor the same thing as a breaker status contact?
No, and this is the most common mix-up. The Eaton C320SNP11 rides on a contactor and follows the contactor coil, giving 1NO-1NC for holding, interlock or run signaling. A breaker auxiliary such as the Square D ComPact NSXm OF/SD contact reports circuit breaker status and trip instead, and an alarm kit like the Square D Type S isolated alarm contact serves overload alarm duty. Pick by what device the contact is reporting on.
7) What other brands of auxiliary contact could I use instead of the Eaton C320SNP11?
The Eaton part is built for Eaton 15-75A contactors, so a swap means matching the brand of the contactor you have. ABB's CR305X Series auxiliary contact serves ABB contactors and relays, the ABB OA1G10 1-NO contact is for OT/OS disconnect switches, and the Bussmann BAC Series covers a 1A to 12A range. These are not interchangeable on an Eaton contactor body; order the accessory that matches the device already in the panel.
8) Is the ABB CR305X auxiliary contact an equivalent to the Eaton C320SNP11?
Both are auxiliary contacts that add a signaling point to a control device, but they are not interchangeable across brands. The Eaton C320SNP11 is a snap switch side-mounted unit with a 1 NO, 1 NC configuration and an open enclosure with a metal mounting plate, dimensioned for Eaton contactors rated 15-75A. The ABB CR305X Series contact is intended for ABB contactors and relays. Match the accessory to the brand and frame of the device already in the panel.
9) I need a trip or blown fuse alarm signal, not a contactor status contact. What is the alternative to the Eaton C320SNP11?
The C320SNP11 reports the state of an Eaton contactor rated 15-75A through its 1 NO, 1 NC contacts, which tracks the contactor, not a protective device. For an isolated alarm signal from a Square D Type S overload relay, the Square D 9999SO4 is an isolated alarm contact kit. For a fuseholder-based indication, the Bussmann BAC Series auxiliary contact covers a 1A to 12A amp range. Pick by the device you need the signal from.
10) Does a Square D 9999SO4 alarm contact kit do the same job as the Eaton C320SNP11 1NO-1NC auxiliary contact?
No. The Square D 9999SO4 is a Type S isolated alarm contact kit, used to provide an isolated alarm output. The Eaton C320SNP11 provides a 1 NO plus 1 NC auxiliary contact pair that mounts to the side of an Eaton contactor rated 15-75A, giving both a normally open and a normally closed point for interlocking or signaling in the control circuit. If your schematic calls for a normally closed interlock in addition to an alarm, the two-contact Eaton unit is the one that covers it on an Eaton contactor.
11) What is the Eaton part number to order for a 1NO-1NC side mount auxiliary contact?
Order Eaton C320SNP11. That is the snap switch side-mounted auxiliary contact with the 1NO-1NC arrangement and the metal mounting plate, for 15-75A Eaton contactors.
12) I need two extra sets of contacts on one Eaton contactor. Does one C320SNP11 cover that?
One C320SNP11 gives you a single normally open and a single normally closed contact. If the control scheme needs two NO and two NC, you are looking at more than one unit or a different accessory, and side mounting means you also need the room on the contactor for each one. Count the control functions, seal-in, interlock, pilot light, before deciding quantity.
How fast can I get the Eaton C320SNP11 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 C320SNP11 come with a warranty?
Absolutely. The Eaton C320SNP11 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 C320SNP11?
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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