How does shipping work for orders on MRO Exchange?

Most orders ship within 1–2 business days via UPS. Larger equipment ships via freight carrier, and customers can use the shipping estimator on the product page for a location-specific quote. Local pickup is also available at the Fairfield, IL facility, typically ready within 4 hours.

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MRO Exchange accepts all major credit cards, PayPal, and Shop Pay. Purchase order and wire transfer payment is also available, with payment due prior to shipment. Custom terms are available for established accounts.

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Square D 8501XC4 Relay Master Contact Cartridge 600V AC Open Box - Unused

$50.00 USD

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✓ 30-day returns on every item — return policy

ConditionOpen Box - Unused MPN8501XC4 Stock #0526-02349

30-day returns on every item. Photos reflect the actual item’s current condition — see our return policy and condition guide.

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⚡ Same-day shipping available — order by 11 am CT ($100 add-on at checkout)

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The Square D 8501XC4 is a master contact cartridge designed for use with Class 8501 Type X NEMA control relays. Rated for 20 amperes at 600 VAC, this plug in cartridge allows the relay base to be configured with either a normally open or normally closed contact by flipping the cartridge orientation within the contact cavity. The blue color coding identifies the cartridge as a master type, which provides the primary contact function within the 8501X modular relay assembly. Compatible with the 8501XMO master control relay platform, the cartridge installs without disturbing field wiring, supporting field conversion between NO and NC contact states. The Class 8501 Type X relay family is widely used in machine tool, automation, and industrial control applications where modular construction, heavy duty cycle life, and ease of field maintenance are required. Manufactured in Mexico and packaged by Square D by Schneider Electric. Stock number 104813 appears on the carton label. This offering is a lot of five individual cartridges, unused, each in original Square D polybag packaging with instruction bulletin reference 50007a 013 28. Series A revision. UL listed and CSA certified per the original product approvals. Cross references include Grainger item 4B516 and MSC item 69682789. The 8501XC4 is the master cartridge complement to the 8501XC1 standard contact cartridge within the same modular relay system.

Stock # 0526-02349

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Shipping & Handling

Most orders ship within 1–2 business days via UPS, but expedited same-day handling is available as an add-on to orders in cart. Larger equipment ships via freight carrier. Use the shipping estimator above for a location-specific quote. Local pickup is also available at our Fairfield, IL facility, typically ready within 4 hours.

Returns & Condition

All items are sold as-described based on the photos and condition listed. If an item arrives differing from its description, it may be eligible for return or refund. See our full condition guide for details on our grading terms.

Payment Options

We accept all major credit cards, PayPal, and Shop Pay. Purchase order and wire transfer payment is also available by selecting "Purchase Order / Wire Transfer" at checkout. Payment is due prior to shipment. Contact us for custom terms on established accounts. Tax exemptions are honored if proper documentation is provided.