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3G Electric
SQUARE D Auxiliary Contact Block, 1NO/1NC, 30 A AC, for 8911DPS Starters - Square D Auxiliary Contacts
SQUARE DSquare D Auxiliary Contacts

SQUARE D Auxiliary Contact Block, 1NO/1NC, 30 A AC, for 8911DPS Starters

The SQUARE D Auxiliary Contact Block (MPN 9999SO4) is a 1NO/1NC contact block with a maximum current rating of 30 A (AC). It is designed for use with SQUARE D 8911DPS Definite Purpose Starters.

SKU 3G-OTH-38105

Brand
SQUARE D
Item
Auxiliary Contact Block, 1NO/1NC, 30 A AC, for 8911DPS Starters
Part Number
9999SO4
Category
Square D Auxiliary Contacts
Available to Order
Also known as:9999SO4SQUARE D
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

SQUARE D
Manufacturer Part Number
9999SO4
Compatible with Series
8911DPS Definite Purpose Starters

Technical Documents

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SQUARE D Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The SQUARE D Auxiliary Contact Block (MPN 9999SO4) is a 1NO/1NC contact block with a maximum current rating of 30 A (AC). It is designed for use with SQUARE D 8911DPS Definite Purpose Starters.

Frequently Asked Questions

What is the SQUARE D Auxiliary Contact Block 9999SO4 used for?

The SQUARE D Auxiliary Contact Block 9999SO4 is used to add extra switching capacity to definite purpose starters. It provides one normally open and one normally closed contact for control circuits, enabling remote monitoring or interlocking in industrial motor control applications.

What are the specifications of the SQUARE D 9999SO4 contact block?

The SQUARE D 9999SO4 is an auxiliary contact block with 1 normally open and 1 normally closed contact. It has a maximum current rating of 30 A (AC) and is compatible with SQUARE D 8911DPS Definite Purpose Starters. The manufacturer part number is 9999SO4.

Where to buy the SQUARE D 9999SO4 contact block worldwide?

You can source the SQUARE D 9999SO4 auxiliary contact block 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.

How to install the SQUARE D 9999SO4 auxiliary contact block?

To install the SQUARE D 9999SO4, first disconnect power to the starter. Mount the block onto the 8911DPS definite purpose starter using the provided hardware. Wire the normally open and normally closed contacts according to your control circuit diagram. Verify operation before restoring power.

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
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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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