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SQUARE D Auxiliary Contact: 1NO/1NC - Square D Auxiliary Contacts
SQUARE DSquare D Auxiliary Contacts

SQUARE D Auxiliary Contact: 1NO/1NC

The SQUARE D Auxiliary Contact (MPN 9999SX8) is a 1NO/1NC auxiliary contact with a maximum current rating of 10 A (AC). It is designed for use with SQUARE D 8903S Lighting Contactors.

SKU 3G-OTH-38092

Brand
SQUARE D
Item
Auxiliary Contact: 1NO/1NC
Category
Square D Auxiliary Contacts
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Technical Specifications

SQUARE D
Manufacturer Part Number
9999SX8
Compatible with Series
8903S Lighting Contactors
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SQUARE D Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The SQUARE D Auxiliary Contact (MPN 9999SX8) is a 1NO/1NC auxiliary contact with a maximum current rating of 10 A (AC). It is designed for use with SQUARE D 8903S Lighting Contactors.

Frequently Asked Questions

What is the SQUARE D 9999SX8 auxiliary contact used for?

The SQUARE D 9999SX8 auxiliary contact is used to add switching capacity to 8903S Lighting Contactors. It provides one normally open and one normally closed circuit for remote signaling or control, rated up to 10 A AC. This is common in industrial lighting panels and building automation systems.

What are the specifications of the SQUARE D 9999SX8 auxiliary contact?

The SQUARE D 9999SX8 is a 1NO/1NC auxiliary contact with a maximum current rating of 10 A (AC). It is compatible with the SQUARE D 8903S Lighting Contactors series. The manufacturer part number is 9999SX8. It is a standard accessory for extending control functions in contactor assemblies.

Where to buy SQUARE D 9999SX8 auxiliary contacts worldwide?

You can source the SQUARE D 9999SX8 auxiliary contact through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time. We supply genuine SQUARE D components for industrial applications.

How to install the SQUARE D 9999SX8 auxiliary contact on a 8903S contactor?

Install the SQUARE D 9999SX8 auxiliary contact by mounting it onto the side of the 8903S Lighting Contactor using the provided hardware. Ensure power is off. Connect control wiring to the NO and NC terminals per your schematic. Torque terminals to manufacturer specifications. Always follow SQUARE D installation guidelines for safety.

Used in

Common applications for SQUARE D
Commercial building electrical panels — Square D QO series plug-in circuit breakers for branch circuit protection
Industrial motor control centers — Square D QOB series bolt-on breakers in NQOD panelboards
Heating equipment installations — Square D QOU series unit-mount breakers for overcurrent protection
Outdoor electrical distribution — Square D L-Frame enclosures housing LAL/LHL breakers for 400 A service
Indoor facility power distribution — Square D Q-Frame enclosures with QBL/QDL breakers for 225 A circuits
Retrofit and replacement in existing Square D load centers — QO series breakers for 120/240V AC systems

SQUARE D Products

3G Electric supplies SQUARE D square d auxiliary contacts. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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