Eaton / Cutler-Hammer QBHW3045HS Miniature Circuit Breaker
- 45A
- 3 Pole
- Bolt-On
Quantity
Eaton / Cutler-Hammer QBHW3045HS - 45A 3 Pole Miniature Circuit Breaker
New
Quantity
Description
Providing advanced control for industrial systems, this 45A miniature circuit breaker incorporates a factory-installed shunt trip for remote disconnection. The bolt-on design ensures a robust connection within Eaton Pow-R-Line 1a and 2a panelboards. Rated to handle 22kA fault currents at 240VAC, this Quicklag device utilizes a fixed thermal-magnetic trip mechanism and is fully HACR rated to support heating and cooling loads.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Series | QBHW |
| Amperage | 45A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 22kA @ 240VAC |
| Terminal Type | Box Lugs |
|---|---|
| For Use With | Eaton Pow-R-Line 1a Panelboards, Eaton Pow-R-Line 2a Panelboards |
| Wire Gauge | 14-4 AWG |
| Max Wire | 4 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Shunt Trip |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Non-Interchangeable Trip |
Product FAQs
7 answersWhich Eaton panelboards are compatible with the QBHW3045HS circuit breaker?
This bolt-on miniature circuit breaker is designed specifically for installation in Eaton Pow-R-Line 1a and Pow-R-Line 2a panelboards.
What does the S suffix mean in the QBHW3045HS catalog number?
The S suffix indicates the breaker is equipped with a factory-installed shunt trip. This allows the breaker to be tripped remotely via an external control voltage, which is frequently required for fire alarm integration or emergency stop applications.
Can I add a shunt trip accessory to a standard QBHW3045 breaker in the field?
No. For Eaton Quicklag miniature breakers, shunt trips are a factory-installed option only and cannot be added in the field. You must purchase the specific shunt trip variant, such as the QBHW3045HS.
What wire gauge is accepted by the terminals on the QBHW3045HS?
The box lug terminals on this 45A breaker accept wire sizes ranging from 14 AWG to 4 AWG. Ensure connections are properly torqued to the manufacturer specifications during installation.
Is the QBHW3045HS suitable for systems with high available fault current?
Yes, the H in the QBHW series designates a high interrupting capacity. This breaker is rated for 22kAIC at 240VAC, providing enhanced short-circuit protection compared to standard 10kAIC Quicklag breakers.
How is the QBHW3045HS secured to the panelboard bus?
It features a bolt-on connection type. Unlike plug-on breakers, it bolts directly to the busbar, ensuring a secure, vibration-resistant mechanical and electrical connection that is ideal for commercial and industrial applications.
What type of trip unit does the QBHW3045HS use?
It uses a fixed thermal-magnetic trip unit. The thermal component provides long-time protection against overloads, while the magnetic component provides instantaneous protection against short circuits.
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 4.8 out of 5 based on 11 reviews.
- CMCalvin M.Verified BuyerReviewingEaton / Cutler-Hammer QBHW2100 - 100A 2 Pole Miniature Circuit BreakerI recommend this productRated 4 out of 5 stars7/22/26SuperBreakers
SuperBreakers haven't disappointed me yet. They always have what I need and very timely deliveries!
- WJWilliam J.Verified BuyerReviewingEaton / Cutler-Hammer QBHW1020 - 20A 1 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars4/2/26Emergency-Overnight Purchase and Delivery
I needed breaker ASAP and SuperBreakers made it happen!
- NSNathan S.Verified BuyerReviewingEaton / Cutler-Hammer QBHW2040S - 40A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars3/19/26Arrived Just in Time
Always satisfied with my SuperBreakers purchases!
- PMPete M.Verified BuyerReviewingEaton / Cutler-Hammer QBHW2015 - 15A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/12/25Great service and very helpful
Knowledgable staff, easy to use website. Quick shipping turnaround.
- BCBrian C.ReviewingEaton / Cutler-Hammer QBHW2020 - 20A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/9/23plug & play
Your website is very user friendly parts arrived promptly exact same parts no issues