Free Shipping Over $99
Square D Q1B290 Molded Case Circuit Breaker
- 90A
- 2 Pole
- Bolt-On
Square D
Q1B290
Molded Case Circuit Breaker
Brand
Square D
SKU
Q1B290
Quantity
Shop with Confidence
Add an extra year of protection in your cart.
Square D Q1B290 - 90A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Similar Items
40A 2 Pole Molded Case Circuit Breaker
90A 3 Pole Molded Case Circuit Breaker
Description
Engineered to fit older NQOB panelboards, the Q1B290 is a 90A, 2-pole molded case circuit breaker. It utilizes reliable thermal-magnetic trip technology to deliver long-time and instantaneous protection for commercial electrical systems. The breaker installs via a sturdy bolt-on connection. When upgrading or replacing, a modern QOB290 breaker can be utilized if paired with the SK5668 horizontal bus bar mounting kit.Specifications
| Brand | Square D |
|---|---|
| Part Number | Q1B290 |
| Series | Q1B |
| Amperage | 90A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Frame Type | Q1B |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | Square D NQOB Panelboards |
| Wire Gauge | #4-2/0 AWG |
| Max Wire | 2/0 AWG |
| Min Wire | 4 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, HACR Rated, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Visual Trip Indicator, Common Trip, Non-Interchangeable Trip |
Product FAQs
3 answersWhich panelboards are compatible with the Square D Q1B290?
This legacy breaker is engineered specifically to fit older Square D NQO and NQOB panelboards.
Is the Square D Q1B290 circuit breaker obsolete?
Yes, the Q1B series is a legacy molded case circuit breaker and is no longer actively manufactured by Square D.
What is the modern replacement for a Q1B290 breaker?
The modern equivalent is the Square D QOB290. However, to install a QOB breaker in an older NQOB panelboard, you must use an SK5668 mounting assembly kit to adapt the bus bar connections.
SuperClub
Join free. Get 500 SuperPoints.
Earn points on eligible purchases and redeem them at checkout.
100 SuperPoints = $1 off.
Warranties
Add an extra year of protection
60-Day Warranty
Your purchase includes 60 days of SuperBreakers warranty coverage.
Add a 1-year warranty extension in your cart.
Get a Quote
Don’t see what you’re looking for?
We source obsolete and hard-to-find parts every day.
Shipping
Free Shipping Policy
Parcel shipments with item value over $99 qualify for free economy shipping within the continental US. Please call to confirm special handling instructions. We do not charge a handling fee or require a minimum amount on any order. SuperBreakers does not ship on customer accounts.
Same Day Shipping
We strive to ship out your items the same day the order is placed. In rare circumstances SuperBreakers may reserve up to 5 business days to consolidate orders for complete shipment.
Expedited Shipments
Orders being shipped via Next Day Air, 2 Day Shipping or 3 Day Shipping must be received by 3 PM EST to guarantee same-day shipments. Expedited orders only ship on normal business days. Shipments will NOT be sent out on Saturdays and Sundays.
International Shipping
All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.
Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 1 review.
Total 5 star reviews: 1 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
Search
Rating
1 review
- MCMichael C.ReviewingSquare D Q1B3100 - 100A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars2/11/22Fast Service.
Fast Service.