Square D QOB1202100 Miniature Circuit Breaker
- 20A
- 1 Pole
- Bolt-On
Quantity
Square D QOB1202100 - 20A 1 Pole Miniature Circuit Breaker
New
Quantity
Description
Square D QOB1202100 miniature circuit breaker is rated 20A with 1 pole and a 10kA interrupting rating at 120/240VAC. It provides overcurrent protection with bolt-on mounting and occupies 2 panel spaces. The pressure plate terminal connection accepts 14-8 AWG copper or aluminum conductors. It is HACR rated and SWD rated, with UL and CSA approvals.Specifications
| Brand | Square D |
|---|---|
| Part Number | QOB1202100 |
| Series | QOB |
| Amperage | 20A |
| Poles | 1 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC, 48VDC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC, 5kA @ 48VDC |
| Frame Type | QOB |
|---|---|
| Terminal Type | Pressure Plate |
| For Use With | Square D NQ and NQOD Panelboards |
| Wire Gauge | 14-8 AWG |
| Max Wire | 8 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Accessories | Alarm Switch 1A |
|---|---|
| Standards | CSA C22.2 No. 5, HACR, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, SWD Rated, Visual Trip Indicator |
Product FAQs
9 answersHow should I select the 20A rating of the Square D QOB1202100?
Its 20A rating is the basis for selecting overcurrent protection for the circuit. Check the load requirements and conductor ampacity when choosing this rating.
What voltage and pole requirements should I check before selecting this breaker?
The breaker is rated 120VAC and 120/240VAC and has 1 pole for a single-phase circuit. Check both the circuit voltage and the required number of protected poles before selecting it.
How do I evaluate its 10kA interrupting rating?
The interrupting rating is 10kA at 120/240VAC. The available fault current at the installation point must not exceed the interrupting rating at the applicable voltage.
How does the thermal-magnetic trip protect the circuit, and can I adjust it?
The thermal element provides long-time protection against sustained overloads, while the magnetic element provides instantaneous response to high-current faults. The trip settings are fixed, so select the breaker by its rating rather than planning field adjustments.
What conductor sizes and materials can I terminate?
The terminals accept copper or aluminum conductors from 14-8 AWG. Choose a conductor within that termination range that also meets the circuit's ampacity requirements.
What torque should I use on the conductor terminals?
Tighten the pressure-plate terminals to 35.4 lb-in (4 N.m). Use a torque tool to achieve the required clamping force rather than tightening by feel.
What mounting method and space allocation should I plan for?
Plan for bolt-on mounting and 2 spaces. Account for that space allocation in the installation layout even though the breaker has 1 pole.
What does the HACR rating mean for equipment-circuit selection?
HACR refers to heating, air-conditioning and refrigeration applications. Use this rating when those applications require HACR-rated overcurrent protection, while also checking the equipment's electrical protection requirements.
Can this breaker be used to switch fluorescent lighting circuits?
The SWD rating supports using the breaker for switching fluorescent lighting circuits. Select it with the lighting circuit's load, voltage and overcurrent-protection requirements in mind.
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Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 214 reviews.
- JCJames C.Verified BuyerReviewingSquare D QOB240GF - 40A GFCI Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars11/11/26Costco Pentagon City
Fast deliver
- CLCraig L.Verified BuyerReviewingSquare D QOB360VH - 60A 3 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars11/6/26Happy
Good part, good service. thank you
- SJSheldon J. H.Verified BuyerReviewingSquare D QOB240 - 40A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars10/12/26Installer
Good price, worked great.
- MLMike L.Verified BuyerReviewingSquare D QOB250 - 50A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars10/9/26breaker orders
Breaker worked out great
Can not be happier with the quick shipping
- RCRichard C.Verified BuyerReviewingSquare D QOB380 - 80A 3 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars10/7/26Great price quick turn around
Thank you for getting me the breaker in a timely fashion