ABB CR305X Series Auxiliary Co...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$159.06
ABB CR305X Series Auxiliary Contact for Contactors and Relays

ABB CR305X Series Auxiliary Contact for Contactors and Relays

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Model: CR305X300B
$159.06

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

$159.06
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ABB CR305X Series Auxiliary Contact for Contactors and Relays

The ABB CR305X Series Auxiliary Contact is an auxiliary switching device engineered for use alongside ABB contactors, relays, and motor starters, adding supplementary control-circuit contact points for signaling, interlocking, and status indication. Built for professional panel building, motor control center assembly, and industrial control system integration, this ABB CR305X Series component ships 1 EA per package for straightforward stocking as a maintenance or spare part. Buy American Act (BAA) and American Recovery and Reinvestment Act (ARRA) compliance documentation is available directly from ABB.

Key Features

  • Auxiliary Switching Function: Adds supplementary contact points to compatible ABB contactors and relays, supporting expanded control-circuit signaling, status feedback, and interlocking schemes.
  • CR305X Series Design: Part of the ABB CR305X Series, engineered to mount directly to the host contactor or relay without consuming additional panel space, simplifying control panel layout and retrofit work.
  • Single-Unit Packaging: Shipped 1 EA per package, making it easy to stock as a replacement or spare part for maintenance programs.
  • Manufacturer Compliance Documentation: Buy American Act (BAA) and American Recovery and Reinvestment Act (ARRA) compliance status is available by contacting ABB directly, supporting government and infrastructure procurement requirements.
  • Country of Origin Disclosure: Country of origin is listed as unspecified; contact ABB for country-of-origin documentation if required for your procurement or compliance records.
  • ABB Build Quality: Manufactured by ABB, a recognized supplier of electrical control components for industrial and commercial control panels.

Technical Specifications

  • Country of Origin: Unspecified; contact manufacturer
  • Packaging: 1 EA
  • Buy American Act (BAA) Compliance: Contact Manufacturer
  • American Recovery and Reinvestment Act (ARRA) Compliance: Contact Manufacturer

Typical Applications

  • Motor Control Centers
  • Contactor and Relay Assemblies
  • Industrial Control Panels
  • Interlocking and Status-Signaling Circuits
  • Panel Building, Maintenance, and Retrofit Projects

Why ABB?

ABB is a globally recognized manufacturer of electrical control and automation components, and this CR305X Series auxiliary contact is designed to integrate cleanly with ABB contactors and relays for consistent control-circuit performance. Choosing a genuine ABB auxiliary contact helps ensure proper fit and function when expanding or maintaining ABB-based control systems, and ABB's ability to provide BAA/ARRA compliance documentation on request supports procurement for regulated and infrastructure projects. For panel builders and maintenance teams standardizing on ABB control components, this CR305X Series auxiliary contact offers a straightforward, single-unit way to add control-circuit points without redesigning the control panel.

Manufacturer Resources

Product Specs

Product Type:
Auxiliary Contact
Series:
CR305X
Department:
Electrical
Product Group:
Motor Control & Automation
Product Subgroup:
Contactors & Relays

ABB CR305X300B – Frequently Asked Questions

1) What does the ABB CR305X auxiliary contact actually do in a control panel?
It adds extra control-circuit contact points to an ABB contactor, relay, or motor starter that doesn't have enough of them. Typical uses are status feedback to a PLC or pilot light, interlocking between two contactors so they can't pull in together, and seal-in circuits. The contact mounts onto the host device rather than taking its own DIN rail or panel space, so it works for retrofits where the panel layout is already full.
2) Which ABB CR305X model numbers are available and how do they differ?
Six part numbers: CR305X100B, CR305X100E, CR305X200A, CR305X300A, CR305X300B, and CR305X500A. The 100, 200, and 500 numbers are the NO/NC arrangement group. The CR305X300A and CR305X300B are the 2-contact configuration, with the 300A in almond and the 300B in black. Order by the exact model number, since the suffix letter is what separates otherwise identical-looking parts.
3) Will this auxiliary contact fit a Square D or Eaton contactor?
No. The CR305X Series is built to mount on ABB contactors, relays, and motor starters, and auxiliary contact blocks are brand- and family-specific mechanically. For other makes, use the block made for that device: Eaton's Freedom Series NEMA top-mount auxiliary contact for Eaton Freedom starters, the Eaton XT auxiliary contact for XT manual motor protectors, or the Square D Type S isolated alarm contact kit for Type S applications.
4) I need a breaker trip/status contact, not a contactor contact. Is this the right part?
No. The CR305X is a contactor and relay auxiliary contact, not a circuit breaker accessory. For breaker status you want a breaker-specific block such as the Square D ComPact NSXm auxiliary contact for OF/SD circuit breaker status, or the Eaton R9 Series auxiliary contact rated 600V for rotary disconnect switches if you're signaling a disconnect position.
5) What is the closest equivalent to the ABB CR305X auxiliary contact if the panel is built on Eaton Freedom NEMA contactors?
Use the Eaton C320KG-SD, a Freedom Series NEMA top-mount auxiliary contact. Both parts do the same job - adding control-circuit contact points to a host contactor for signaling and interlocking - but each mounts to its own manufacturer's device. The ABB CR305X Series is built to mount directly to ABB contactors and relays, so on a Freedom-based motor control center the Eaton top-mount block is the part that will seat on the contactor.
6) I need an auxiliary contact for a manual motor protector, not a contactor - is the CR305X the right part?
No. The ABB CR305X Series is an auxiliary contact for ABB contactors and relays and mounts to the host contactor or relay itself. For a manual motor protector, the Eaton XTPAXSA is the XT Series auxiliary contact built for manual motor protectors. The two are not interchangeable because the host device and its mounting interface are different.
7) Can I use the ABB CR305X to report circuit breaker status?
The CR305X Series adds contact points to ABB contactors and relays for signaling, interlocking, and status indication on the contactor itself. For breaker position and trip status, the part built for that is the Square D LV426950 ComPact NSXm auxiliary contact, which provides OF/SD circuit breaker status. Different host device, different job - pick by what the contact is bolting onto.
8) Can I get Buy American Act or ARRA compliance documentation for this ABB auxiliary contact?
ABB provides BAA and ARRA compliance status directly on request. Country of origin is likewise listed as unspecified, so if your procurement file needs a country-of-origin letter for a federal or infrastructure job, request that documentation from ABB against the specific model number you're buying.
9) Can I add contacts to an existing ABB starter without redesigning the panel?
That's the main case for the CR305X. Because the block mounts onto the host contactor or relay instead of needing its own footprint, you can pick up an extra NO or NC point for a pilot light, alarm, or interlock without moving anything else on the DIN rail or reworking the enclosure layout. It's a common fix on maintenance and retrofit work in existing motor control centers.
10) What should I order instead of the CR305X if I need an isolated alarm contact on a Square D starter?
The Square D 9999SO4 Type S isolated alarm contact kit is the part for a Square D Type S assembly. The ABB CR305X Series is a contactor- and relay-mounted auxiliary contact for ABB devices, so it is not a drop-in on Square D gear. Match the kit to the starter line you already have in the panel.
11) Is a Bussmann BAC auxiliary contact a substitute for the ABB CR305X?
They are not interchangeable. The Bussmann BAC Series is an auxiliary contact with a 1A to 12A amp range, associated with Bussmann disconnect and fuse gear, while the ABB CR305X Series is designed to mount directly to ABB contactors and relays without taking extra panel space. If you are expanding contact points on an ABB contactor, stay with the CR305X; the BAC belongs on its own host.
12) Within the ABB CR305X family, how do I choose between the CR305X100, 200 and 500 models and the CR305X300?
The CR305X100, CR305X200 and CR305X500 models - such as CR305X100B, CR305X100E, CR305X200A and CR305X500A - are supplied in NO/NC contact arrangements, while the CR305X300 is the 2-contact configuration and comes in almond (CR305X300A) and black (CR305X300B). Choose by how many control-circuit points your interlock or status scheme needs and the normally open or normally closed state each one has to hold.
13) Does the ABB CR305X ship as a single piece or in a multi-pack?
One each per package. That's convenient for MRO stocking where you want a couple of spares on the shelf, but if you're building out a motor control center and need a block on every starter, order the quantity per unit rather than assuming a kit.
14) Do the almond and black CR305X300 versions differ electrically?
Both the CR305X300A and CR305X300B are the 2-contact configuration; the difference between them is the housing color, almond versus black. Panel builders usually pick color for circuit identification, not function.
How fast can I get the ABB CR305X300B 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 CR305X300B come with a warranty?
Absolutely. The ABB CR305X300B 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 CR305X300B?
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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