Confirm the complete QO3805273 part number and series from the product label.

SQUARE D QO3805273 Miniature Breaker - Compact Protection
- Part number
- QO3805273
- Availability
- In stock
- Category
- Electrical Control & Protection
- Subcategory
- Circuit Breakers
QO3805273 product information
SQUARE D Miniature Circuit Breaker QO3805273 Reliable Power
Reliable overcurrent protection for residential and commercial electrical systems
| Brand | Square D |
| Model | QO3805273 |
| Voltage | 120/240V AC |
| Country of Origin | United States |
| Weight | 0.5 lbs |
| Dimensions | 3.5 x 1.5 x 2.5 inches |
| Warranty | 1-year limited warranty |
| Certifications | UL Listed, CSA Certified |
| SKU / MPN | QO3805273 |
| What’s in the box | 1 x Miniature Circuit Breaker, Installation Guide |
| Amperage Rating | 50A |
| Number of Poles | 2 |
| Interrupt Rating | 10kA |
| Trip Type | Thermal-Magnetic |
| Mounting Type | DIN Rail |
| Terminal Type | Screw |
Key benefits: Enhanced safety with thermal-magnetic trip technology, Easy installation on standard DIN rails, Durable construction for long-lasting performance
Typical applications: Residential electrical panels, Commercial building circuits, Light industrial applications
Order number: SQUARE D Miniature Circuit Breaker QO3805273 Reliable Power
Lifecycle: 10+ years
Confirm the complete system—not only the model number
Industrial components can differ by series, firmware, voltage, network, terminal base, memory, accessories and approvals. A matching front label does not by itself guarantee a drop-in replacement.
Send the existing system or application information when compatibility matters.
State quantity, preferred condition, destination and required delivery date.
Include a clear nameplate photo when the revision is uncertain.
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New product
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Unused surplus
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Refurbished product
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Used product
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Technical references
Manufacturer documentation should be used for engineering, installation, safety and certification decisions. This page supports identification and sourcing; it does not replace the manufacturer manual.
Common product questions
Find answers about product identification, compatibility, condition options and quotation requirements.
How can I identify the correct product?
Check the complete part number, series, revision and product label before requesting a quotation.
How should compatibility be confirmed?
Compare the electrical specifications, communication requirements, accessories and existing system documentation.
Which condition options are available?
Products may be offered as new, surplus, refurbished or used. The quotation will state the supplied condition.
What information is needed for a quotation?
Provide the part number, quantity, preferred condition, destination and required delivery date.
Send the part number and receive a clear quotation.
Include quantity, acceptable condition, destination and timing. A label photo helps verify the request.

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