Square D QO21001021 Miniature Circuit Breakers (MCBs)

120/240 VAC 50/60 Hz, 100 A, 10 kA Interrupt, 2-Pole, Plug-On Mount, 3-Panel Space, Box Lug Terminal, AC Shunt Trip, Standard, Miniature Circuit Breaker
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MPN: QO21001021
UPC: 78590103053
Weight: 0.00 LBS
Minimum Purchase: 1 unit
Disclaimer: Critical Surplus is not an authorized distributor, reseller or representative of any manufacturer, brand or product listed. All product names, trademarks, brands and logos are the property of their respective owners. The depiction, description or sale of products featuring these names, trademarks, brands and logos is for identification purposes only and is not intended to indicate any affiliation with or authorization by any rights holder. All items sold by Critical Surplus are covered under Critical Surplus' warranty and not the manufacturer warranty.

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    Quality parts for less

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    Sourced Responsibly

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Description

Genuine Square D QO21001021 surplus parts. Sourced from verified OEM and distributor channels, fully inspected for authentic quality and dependability.

Critical Surplus specializes in responsibly sourced OEM surplus parts, giving contractors and facilities access to hard-to-find parts without compromising safety or performance. Every item we stock is from verified supply-chain partners — never counterfeit, never untested — and each part is inspected, cataloged, and stored in a controlled environment to preserve its integrity. With transparent condition grading and fast fulfillment, you get dependable equipment very quickly and at a fraction of regular distributor pricing.

Key Features & Benefits

  • Trusted OEM quality: Square D QO21001021
  • Compatible with: QO Load Center, NQOD Panelboard, OEM Interior/Speed-D Switchboard Distribution Panel
  • Standards & Approvals: UL, CSA
  • Surplus value: Authentic OEM surplus at lower cost.
  • Ready to ship: In-Stock and ideal for replacements and emergency service calls.

Technical Specifications

Manufacturer Square D
Catalog Number QO21001021
Interrupting Rating 10 kA
Type Common Trip, Thermal Magnetic
Voltage Rating 120/240 VAC at 50/60 Hz
Approval UL, CSA
Current Rating 100 A
Wire Size 4 to 2/0 AWG (Aluminum/Copper)
Used On QO Load Center, NQOD Panelboard, OEM Interior/Speed-D Switchboard Distribution Panel
Terminal Type Box Lug
Mounting Plug-On
CAD Drawings SchneiderElectric-SquareD_17845_1_CAD.pdf
Data Sheet SchneiderElectric-SquareD_14923_1_2_DATA.pdf
Number of Poles 2
Catalog SchneiderElectric-SquareD_03264_1_3_1_9_1_39_1_47_CAT.pdf
Size 1.5 Inch W x 2.91 Inch D x 3 Inch H
Country of Origin Mexico

Condition & Warranty

This QO21001021 is offered as unused surplus sourced through authorized distributor and OEM channels. Units may arrive in non-retail packaging and may show minor storage-related cosmetic handling. 90-day limited replacement warranty included.

Shipping & Handling

Most orders ship within 1 business day with immediate tracking updates. Expedited shipping and freight support available. Choose Next Day Air at checkout or contact us for more information.

Why Buy from Critical Surplus?

  • Circular economy model: Responsible surplus sourcing.
  • Industrial-grade inventory: OEM components only.
  • Technical support: Help with compatibility and spec verification.
  • Bulk options: Multi-unit and pallet pricing available.

Ready to Order?

Secure your Square D QO21001021 today — add to cart or contact us for bulk pricing.

Square D QO21001021 Miniature Circuit Breakers (MCBs)

Square D QO21001021 Miniature Circuit Breakers (MCBs)

$383.04

Square D QO21001021 Miniature Circuit Breakers (MCBs)

$383.04
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