ABB OA1G10 1-NO Auxiliary Cont...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$55.73
ABB OA1G10 1-NO Auxiliary Contact Switch for OT/OS Disconnects

ABB OA1G10 1-NO Auxiliary Contact Switch for OT/OS Disconnects

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Model: OA1G10

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

$55.73
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ABB OA1G10 1-NO Auxiliary Contact Switch for OT/OS Disconnects

The ABB OA1G10 is a 1-NO (single normally-open) auxiliary contact switch engineered for use with ABB OT/OS series disconnect switches. This auxiliary contact mounts directly to the disconnect switch body to provide remote position signaling, allowing control panels, PLCs, and monitoring circuits to confirm whether the associated OT/OS switch is open or closed. Supplied individually (1 ea per package), the OA1G10 is designed to integrate cleanly with the OT/OS switch family, giving electrical contractors and panel builders a straightforward add-on component for interlocking, status indication, and remote monitoring in commercial and industrial electrical systems.

Key Features

  • Contact Configuration: 1-NO (one normally-open) auxiliary contact for remote status indication and electrical interlocking applications.
  • Switch Compatibility: Purpose-built for ABB OT/OS series disconnect switches, allowing simple add-on mounting to new or existing switch assemblies without custom fabrication.
  • Auxiliary Signaling: Provides a secondary electrical signal that mirrors the position of the main disconnect switch, supporting remote monitoring, alarms, and control-circuit interlocks.
  • Field-Ready Design: Compact auxiliary contact construction intended for quick installation onto the OT/OS switch housing during initial build-out or as a retrofit upgrade.
  • Individual Packaging: Supplied 1 ea per package for straightforward stocking, replacement, and per-switch ordering.
  • Model Reference: Identified by ABB model designation OA1G10 for accurate cross-reference, spec-matching, and reordering.

Technical Specifications

  • Country of Origin: UKN
  • Packaging: 1 ea
  • Contact Type: 1-NO Auxiliary Contact
  • Compatible Switch Series: ABB OT/OS Disconnect Switches

Typical Applications

  • OT/OS Series Disconnect Switch Assemblies
  • Remote Switch Position Indication and Signaling
  • Industrial Control Panels and Motor Control Centers
  • Panelboard and Switchboard Interlock Circuits
  • Safety Interlock and Alarm Circuits Tied to Disconnect Position
  • Commercial and Industrial Electrical Installations

Why ABB?

ABB is a recognized manufacturer of industrial disconnect switches and related accessories, and the OA1G10 auxiliary contact is engineered to work seamlessly with the OT/OS switch platform it is designed for. Choosing an ABB-branded auxiliary contact helps ensure consistent fit, reliable signaling performance, and dependable long-term operation for electrical professionals specifying complete OT/OS switch assemblies. Because the OA1G10 is purpose-matched to the OT/OS family, it simplifies sourcing and helps maintain consistent quality across an entire disconnect switch installation.

Manufacturer Resources

Spec Sheet

Product Specs

Product Type:
Auxiliary Contact
Series:
OA1G10
Configuration:
1-NO
Department:
Electrical
Product Group:
Wiring Devices
Product Subgroup:
Motor Starters & Contactors

ABB OA1G10 – Frequently Asked Questions

1) Is the ABB OA1G10 a normally open or normally closed contact?
One normally open contact, 1-NO. The contact closes when the disconnect closes, so a control circuit, PLC input, or indicator lamp sees a signal that mirrors the main switch position. If your interlock logic needs a normally closed signal (for example, a permissive that must break when the switch closes), the 1-NO configuration won't do that job on its own.
2) I'm not running ABB gear. What auxiliary contact do I use for another brand of disconnect?
Match the contact to the switch platform, since these are not cross-brand parts. For an Eaton rotary disconnect, the Eaton auxiliary contact for rotary disconnect switches in the R9 series is the counterpart. On Eaton manual motor protectors, it's the XT auxiliary contact. For Eaton Freedom series NEMA starters there is a top-mount auxiliary contact, and Square D Type S starters use the Type S isolated alarm contact kit. The ABB OA1G10 belongs on ABB OT/OS switches.
3) Can a Square D ComPact NSXm auxiliary contact be used in place of the ABB OA1G10?
No. The Square D LV426950 is a ComPact NSXm auxiliary contact that reports OF/SD circuit breaker status, so it is an internal accessory for a molded case circuit breaker. The ABB OA1G10 is a 1-NO auxiliary contact that mounts to ABB OT/OS series disconnect switches to signal the position of a disconnect. They both feed a control circuit, but one is breaker-mounted and one is disconnect-mounted; they are not interchangeable in either direction.
4) What is the closest equivalent to the ABB OA1G10 auxiliary contact if the disconnect on the job is an Eaton rotary switch?
The OA1G10 is a 1-NO auxiliary contact built specifically for ABB OT/OS series disconnect switches, so it mounts to the OT/OS switch body and will not carry over to another manufacturer's disconnect. For an Eaton rotary disconnect switch, the equivalent add-on is the Eaton auxiliary contact for rotary disconnect switches in the R9 series, rated 600V. Both do the same job - mirror the main switch position into a control circuit - but each is matched to its own switch platform, so pick the one that matches the disconnect already in the enclosure.
5) What auxiliary contact should I use on a manual motor protector or a NEMA contactor instead of the ABB OA1G10?
The OA1G10 is purpose-matched to the ABB OT/OS disconnect switch family and mounts to the switch housing, so it does not belong on a starter or motor protector. For a manual motor protector, the Eaton XTPAXSA is an XT series auxiliary contact built for that application. For a NEMA contactor or starter, the Eaton C320KG-SD is a Freedom series top-mount auxiliary contact. Match the contact to the device platform it clips onto.
6) What is an auxiliary contact on a disconnect switch actually used for?
It gives you a second, low-power set of contacts that follow the position of the main blades, without tapping the power circuit. Typical uses for the ABB OA1G10 are remote position indication on a panel, feeding a PLC input so the control system knows whether the disconnect is open or closed, electrical interlocking between circuits, and alarm circuits tied to disconnect position. It doesn't switch load current; it's a signaling device.
7) How many OA1G10 contacts do I get in a package?
The OA1G10 auxiliary contact is supplied individually, one each per package. If you're outfitting a motor control center or a panel with multiple OT/OS disconnects, order one per switch, and order one per contact if a given switch needs more than a single status signal.
8) Do I have to replace the disconnect switch to add position monitoring, or can I add a contact to what's installed?
You can add it to what's already there. The OA1G10 is designed for quick installation onto an ABB OT/OS switch housing as a retrofit, so an existing disconnect that was installed without status signaling can be upgraded in place rather than swapped out. That matters on MRO work where the switch and its enclosure are already wired.
9) I need a contact that signals only when a device has tripped, not open or closed status - is the OA1G10 the right part?
No. The ABB OA1G10 is a 1-NO auxiliary contact that mirrors the open or closed position of an ABB OT/OS disconnect switch for remote indication and interlocking. For trip or fault signaling instead, the Square D 9999SO4 is a Type S isolated alarm contact kit, and the Square D LV426950 ComPact NSXm contact covers OF/SD breaker status. Those report a device condition rather than a disconnect handle position.
10) Is the Bussmann BAC auxiliary contact a substitute for the ABB OA1G10?
They serve different signals. The Bussmann BAC series auxiliary contact is offered in a 1A to 12A amp range as a fuse-related accessory, while the ABB OA1G10 is a 1-NO contact that attaches to an ABB OT/OS disconnect switch to report whether that switch is open or closed. If the control circuit needs to know disconnect handle position on an OT/OS assembly, the OA1G10 is the matched part.
11) What part number do I put on the order for the ABB OT/OS 1-NO auxiliary contact?
Order it as ABB OA1G10. That designation is both the model and the manufacturer part number, so it cross-references cleanly on a submittal or a reorder against an existing OT/OS switch assembly.
12) If I need two separate status signals from one disconnect, can I stack OA1G10 contacts or should I look at another contact?
The ABB OA1G10 is supplied one each per package and provides a single normally-open contact, so each unit gives one signal path off the OT/OS switch - order per signal needed and per switch. If the design instead calls for a paired status and trip indication on a molded case breaker, the Square D LV426950 ComPact NSXm contact is built around OF/SD breaker status signaling. For an OT/OS disconnect, the OA1G10 remains the platform-matched choice.
How fast can I get the ABB OA1G10 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 ABB OA1G10 come with a warranty?
Absolutely. The ABB OA1G10 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 ABB OA1G10?
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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