Square D D224NRB General Duty ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$441.00
Square D D224NRB General Duty Fusible Safety Switch, NEMA 3R

Square D D224NRB General Duty Fusible Safety Switch, NEMA 3R

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Model: D322NRB

In Stock (leaves warehouse same day if ordered before 3pm ET)

$441.00
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Square D D224NRB General Duty Fusible Safety Switch, NEMA 3R Enclosure

Square D by Schneider Electric general duty fusible safety switches deliver dependable over-current and short-circuit protection for residential and light commercial applications, including lighting, air conditioning, and appliance circuits. This family is available in 2-pole and 3-pole configurations, rated 240V AC operational voltage with a NEMA 3R enclosure for outdoor and wet-location mounting. Every configuration features a quick-make, quick-break operating mechanism and lug-style electrical connections for AWG 6...250 kcmil aluminum/copper conductors, tightened to 275 lbf.in. UL Listed (File E2875) for code-compliant residential and commercial installations, these fusible disconnect switches are engineered for durability and economy across the full pole-count range.

Key Features

  • Pole Configurations: Available in 2-pole and 3-pole versions to match single-phase and three-phase circuit requirements.
  • Rated Operational Voltage (Ue): 240V AC for dependable circuit protection across all pole configurations.
  • Connection Type: Lug-style terminals accept AWG 6...250 kcmil aluminum/copper conductors, tightened to 275 lbf.in.
  • Motor Power Rating: Up to 25 hp at 240V AC 60 Hz for 3-phase motors and 15 hp for 1-phase motors.
  • Quick-Make, Quick-Break Mechanism: Provides positive, fast switching action for safe operation.
  • Short Circuit Current Rating: Up to 100 kA maximum depending on fuse class H, K, or R.
  • Enclosure Rating: NEMA 3R (Type R) enclosure suitable for outdoor and wet-location mounting.
  • Device Type: Single throw fusible disconnect switch designed for residential and commercial use.

Certifications & Compliance

  • UL Listed (File E2875)
  • NEMA 3R Rated Enclosure
  • RoHS Exemption Compliant

Technical Specifications

  • Voltage Rating: 240V
  • Connection Type: Lugs
  • Toxic Heavy Metal Free: Yes
  • Warranty Period: 18 months
  • Sustainable Packaging: Yes
  • Serviceability: No
  • With Recycled Cardboard: Yes
  • Without Single Use Plastic: Yes
  • Mercury Free: Yes
  • Average Life Duration: 15 year(s)
  • Returnability: Yes

Typical Applications

  • Residential and Light Commercial Electrical Service
  • Lighting Circuit Disconnects
  • Air Conditioning Equipment Disconnects
  • Appliance Circuit Protection
  • Outdoor and Wet-Location Disconnect Installations

Why Square D?

Square D by Schneider Electric is engineered for durability and economy across the full 2-pole and 3-pole lineup, with a UL Listed fusible disconnect design, quick-make quick-break switching mechanism, and a code-compliant NEMA 3R enclosure that contractors and panel builders trust for reliable over-current and short-circuit protection.

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Manufacturer Resources

Product Specs

Product Type:
Safety Switch
Voltage Rating:
240V
Configuration:
NEMA 3R Enclosure
Connection Type:
Lugs
Listing:
UL Listed
Standards:
NEMA 3R
Department:
Electrical
Product Group:
Power Distribution
Product Subgroup:
Safety Switches & Disconnects
Country Of Origin:
United States

Square D D322NRB – Frequently Asked Questions

1) Can the Square D D224NRB safety switch be mounted outdoors next to an AC condenser?
Yes. The D224NRB comes in a NEMA 3R enclosure, which is rated for outdoor and wet-location mounting, and air conditioning equipment disconnects are one of its stated applications. It is a general duty switch at 240V, so it suits residential and light commercial service rather than 480V industrial feeders.
2) What is the difference between the D224NRB and the D322NRB?
Pole count. D224NRB is the 2-pole version for single-phase circuits; D322NRB is the 3-pole version for three-phase. Both are 240V general duty fusible switches in a NEMA 3R enclosure. Pick 2-pole for a single-phase feeder or 240V appliance circuit, 3-pole for a three-phase motor load.
3) What wire size will the lugs on this Square D general duty disconnect accept?
The lug terminals take AWG 6 through 250 kcmil aluminum or copper conductors, torqued to 275 lbf.in. That covers most 240V service and feeder runs into a general duty disconnect. If your conductors are smaller than #6, you need a different switch or a reducing lug.
4) Will this Square D switch work as a motor disconnect, and for how big a motor?
Yes, within its ratings: up to 25 hp at 240V AC 60 Hz on three-phase, and 15 hp on single-phase. Use the 3-pole D322NRB for three-phase motors and the 2-pole D224NRB for single-phase.
5) Do I have to buy the fuses separately for a fusible safety switch like this?
Yes. A fusible disconnect is sold as the switch and enclosure; the fuses are specified and bought to match your circuit. On the Square D general duty switch the short circuit current rating runs up to 100 kA depending on whether you install Class H, K, or R fuses, so the fuse class you choose sets the available fault current the installation can withstand.
6) Can I use this Square D disconnect on a 480V circuit?
No. Rated operational voltage is 240V AC, so it must not be applied to 480V. For higher voltage you need a 600V-rated switch, such as the ABB Spec-Setter TC-72367 (600V AC, 3-pole, fusible) in an indoor NEMA 1 enclosure.
7) Is the Square D D224NRB a heavy-duty switch, or do I need a different switch for an industrial feeder?
The Square D D224NRB line is a general duty fusible safety switch, 240V, intended for residential and light commercial loads such as lighting, air conditioning, and appliance circuits, with motor ratings up to 25 hp at 240V AC three-phase. For industrial service where a heavy-duty switch is specified, the ABB THN3365A is a heavy-duty safety switch rated 400A, 3-pole, 600V, and the ABB TC-72367 Spec-Setter is a heavy-duty fusible switch at 3-pole 600V AC. Heavy-duty construction and the higher voltage class are the two differences to check against your drawing.
8) What is the closest cross-brand equivalent to the Square D D224NRB general duty fusible safety switch?
The nearest equivalent from another manufacturer is the ABB TG-Series Spec-Setter, which is also a general duty fusible safety switch. The Square D D224NRB family is rated 240V with a NEMA 3R enclosure and lug connections for AWG 6 to 250 kcmil aluminum/copper conductors, in 2-pole (D224NRB) and 3-pole (D322NRB) versions. If you are matching an existing general duty fused disconnect on a residential or light commercial feeder, the TG-Series is the comparable grade; confirm the specific TG catalog number carries the enclosure type your mounting location needs.
9) I need a fusible disconnect rated for 600V instead of 240V - what should I use instead of the D224NRB?
The Square D D224NRB family is rated 240V, so it is not suitable for a 480V or 600V circuit. For a 600V fused disconnect, the ABB TC-72367 Spec-Setter is a heavy-duty fusible safety switch, 3-pole, 600V AC in a NEMA 1 enclosure. Note that NEMA 1 is indoor only, while the D224NRB uses a NEMA 3R enclosure suitable for outdoor and wet-location mounting, so an outdoor 600V application needs an outdoor-rated enclosure or a separate weatherproof housing.
10) Can I use an Eaton DH366URK in place of the Square D D224NRB?
They are not interchangeable in function. The Eaton DH366URK is a K Series non-fusible safety switch rated 600A in a NEMA 3R enclosure, while the Square D D224NRB family is a single throw fusible disconnect rated 240V with fuse-based short circuit protection up to 100 kA depending on fuse class H, K, or R. Both are NEMA 3R, so either can mount outdoors, but the Eaton unit provides no over-current protection of its own - if your circuit relies on the disconnect to carry fuses, you need the fusible Square D switch or another fusible model.
11) I need to switch between two power sources, such as utility and generator. Will the Square D D224NRB work?
No. The Square D D224NRB family is a single throw fusible disconnect switch, which connects or isolates one source. For transferring a load between two sources, the Eaton heavy-duty double-throw non-fused safety switch in painted steel with a NEMA 1 enclosure is the double-throw type for that job. Keep in mind it is non-fused, so over-current protection has to come from elsewhere, and its NEMA 1 enclosure is indoor only, unlike the NEMA 3R enclosure on the Square D switch.
12) I don't want fuses in the disconnect, just a shutoff. What should I use instead?
If you only need a means of disconnect and the overcurrent protection lives upstream in the panel, a non-fusible switch is the right part. The Square D D224NRB and D322NRB are fusible. For a non-fused outdoor unit, ZenSupply carries the Eaton DH366URK K Series non-fusible safety switch, 600A in a NEMA 3R enclosure, which is also rated for outdoor mounting.
13) For an outdoor AC condenser disconnect, which switch should I pick?
The Square D D224NRB general duty fusible switch is built for that application: 240V, NEMA 3R enclosure rated for outdoor and wet-location mounting, with air conditioning equipment disconnects listed among its typical uses, and a 2-pole version (D224NRB) for single-phase condensers or a 3-pole version (D322NRB) for three-phase. Among the alternatives, the Eaton DH366URK K Series is also NEMA 3R but is non-fusible and rated 600A, which is far above a residential condenser load, while the ABB TC-72367 and the Eaton double-throw switch both use NEMA 1 enclosures that are not intended for outdoor mounting.
14) What does quick-make, quick-break mean on a safety switch, and does this one have it?
It means the switch blades snap open and closed fast and positively rather than drifting, which limits arcing at the contacts and gives a clear on/off. Both the 2-pole and 3-pole Square D general duty NEMA 3R switches use that mechanism.
15) Is there a comparable general duty fusible switch from another brand if I'm standardizing on one manufacturer?
ZenSupply carries the ABB TG-Series Spec-Setter, which is also a general duty fusible safety switch. The Square D unit here is specifically 240V in a NEMA 3R outdoor enclosure, so match the voltage, pole count and enclosure type on the ABB before swapping it into the same spec.
How fast can I get the Square D D322NRB delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Square D D322NRB come with a warranty?
Absolutely. The Square D D322NRB is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Square D D322NRB?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Square D D322NRB from ZenSupply?
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