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SQUARE D Safety Switch: Fusible, 30 A, Three Phase, 240V AC, Galvanized Steel - Fusible Safety Switches
SQUARE DFusible Safety Switches

SQUARE D Safety Switch: Fusible, 30 A, Three Phase, 240V AC, Galvanized Steel

The SQUARE D D321NRB is a 30 A, three-phase, fusible safety switch rated for 240V AC. Constructed with galvanized steel for indoor/outdoor use, this switch provides a reliable disconnection point for electrical circuits.

SKU 3G-OTH-28363

Brand
SQUARE D
Item
Safety Switch: Fusible, 30 A, Three Phase, 240V AC, Galvanized Steel
Category
Fusible Safety Switches
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Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

SQUARE D
Manufacturer Part Number
D321NRB
Type
30 A, Three Phase, Galvanized Steel, Indoor/Outdoor
AC
240V

Technical Documents

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

Product Description

The SQUARE D D321NRB is a 30 A, three-phase, fusible safety switch rated for 240V AC. Constructed with galvanized steel for indoor/outdoor use, this switch provides a reliable disconnection point for electrical circuits.

Frequently Asked Questions

What is the SQUARE D D321NRB safety switch used for?

The SQUARE D D321NRB is a fusible safety switch used to safely disconnect electrical power for maintenance or emergency shutdown in industrial and commercial three-phase systems up to 240V AC. It is suitable for indoor/outdoor installations with a galvanized steel enclosure.

What are the specifications of the SQUARE D D321NRB safety switch?

The SQUARE D D321NRB is a 30 A, three-phase, 240V AC fusible safety switch with a galvanized steel enclosure rated for indoor/outdoor use. It accepts Class R or Class H fuses and features a visible blade design for safe lockout/tagout. The manufacturer part number is D321NRB.

Where to buy the SQUARE D D321NRB safety switch worldwide?

3G Electric supplies the SQUARE D D321NRB safety switch worldwide. As a global industrial distributor since 1990, we handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time. We source genuine SQUARE D components for reliable power disconnection.

How to install the SQUARE D D321NRB safety switch?

Install the SQUARE D D321NRB by mounting the galvanized steel enclosure on a flat surface using the provided knockouts. Ensure the switch is de-energized, connect line and load conductors per local codes, and install the correct fuse type (Class R or H). Always follow lockout/tagout procedures before servicing.

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 fusible safety switches. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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