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SQUARE D Rotary Operator: Rotary Operator, 125 A Amps, 3 Poles - Square D Circuit Breaker Handles & Operators
SQUARE DSquare D Circuit Breaker Handles & Operators

SQUARE D Rotary Operator: Rotary Operator, 125 A Amps, 3 Poles

The SQUARE D Rotary Operator (MPN 9421LB3) is a 3-pole circuit breaker handle and operator accessory designed for use with NEMA 1, 3, 3R, 4, 4X, and 12 enclosures housing PowerPact B circuit breakers. It includes a…

SKU 3G-OTH-19454

Brand
SQUARE D
Item
Rotary Operator: Rotary Operator, 125 A Amps, 3 Poles
Category
Square D Circuit Breaker Handles & Operators
Available to Order
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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
9421LB3
Amps
125 A
Poles
3
Includes
3 in Handle
For Use With
NEMA 1, 3, 3R, 4, 4X, 12 Enclosures with PowerPact(R) B Circuit Breakers
Accessory Type
Rotary Operator
Number of Poles
3
Handle/Long Shaft
3 in

Technical Documents

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

Product Description

The SQUARE D Rotary Operator (MPN 9421LB3) is a 3-pole circuit breaker handle and operator accessory designed for use with NEMA 1, 3, 3R, 4, 4X, and 12 enclosures housing PowerPact B circuit breakers. It includes a 3-inch handle and is rated for 125 A amps.

Frequently Asked Questions

What is the SQUARE D 9421LB3 rotary operator used for?

The SQUARE D 9421LB3 rotary operator is a circuit breaker handle accessory for PowerPact B breakers in NEMA 1, 3, 3R, 4, 4X, and 12 enclosures. It provides a 3-inch handle for manual on/off control in industrial and commercial power distribution panels.

What are the specifications of the SQUARE D 9421LB3 rotary operator?

The SQUARE D 9421LB3 is a 3-pole rotary operator rated for 125 A amps. It includes a 3-inch handle and is designed for use with PowerPact B circuit breakers in NEMA 1, 3, 3R, 4, 4X, and 12 enclosures. The accessory type is rotary operator, MPN 9421LB3.

Where to buy the SQUARE D 9421LB3 rotary operator worldwide?

3G Electric supplies the SQUARE D 9421LB3 rotary operator worldwide. As a global industrial equipment distributor since 1990, we handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time.

How to install the SQUARE D 9421LB3 rotary operator?

Install the SQUARE D 9421LB3 rotary operator by mounting it on the PowerPact B circuit breaker inside the enclosure. Ensure the 3-inch handle aligns with the breaker mechanism. Follow SQUARE D's generic installation instructions for NEMA enclosures to maintain proper sealing and 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 circuit breaker handles & operators. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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