Free Shipping Over $99
Square D Q1B240 Molded Case Circuit Breaker
- 40A
- 2 Pole
- Bolt-On
Square D
Q1B240
Molded Case Circuit Breaker
Brand
Square D
SKU
Q1B240
Quantity
Shop with Confidence
Add an extra year of protection in your cart.
Square D Q1B240 - 40A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Similar Items
90A 2 Pole Molded Case Circuit Breaker
40A 3 Pole Molded Case Circuit Breaker
Description
Serving commercial and industrial applications, the Q1B240 delivers 40 amps of thermal-magnetic protection. This two-pole unit integrates into legacy Square D NQOB panelboards to manage standard electrical loads. Installation requires bolt-on connections to secure the breaker within the chassis. For modern upgrades, it can be substituted with a QOB240 using an SK5668 mounting kit. Equipped with Visi-Trip technology, users can quickly identify tripped circuits during maintenance.Specifications
| Brand | Square D |
|---|---|
| Part Number | Q1B240 |
| Series | Q1B |
| Amperage | 40A |
| 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 | #8-2 AWG |
| Max Wire | 2 AWG |
| Min Wire | 8 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
6 answersWhich panelboards accept the Q1B240 circuit breaker?
This breaker is specifically designed for installation in legacy Square D NQOB panelboards.
What is the physical width of the Q1B240?
The Q1B series features a 1-inch per pole form factor. As a 2-pole breaker, the Q1B240 measures 2 inches in total width.
How is the Q1B240 secured to the panelboard bus?
It utilizes a bolt-on connection, requiring it to be mechanically fastened to the panelboard busbar with screws rather than snapping into place.
What type of trip unit does the Q1B240 use?
It is equipped with a fixed thermal-magnetic trip unit. This provides both long-time thermal overload protection and instantaneous magnetic short-circuit protection.
Is the Q1B240 still in active production?
The Q1B frame is a legacy molded case circuit breaker series from Square D and Schneider Electric. It is typically sourced for replacing existing breakers or expanding older NQOB panels.
Where can I find the terminal torque specifications for the Q1B240?
Always refer to the manufacturer label on the side of the breaker for the exact torque specifications. Torque values depend on the specific wire gauge used during installation to ensure a safe and compliant connection.
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.