Eaton / Cutler-Hammer CHB350ST Miniature Circuit Breaker
- 50A
- 3 Pole
- Bolt-On
Quantity
Eaton / Cutler-Hammer CHB350ST - 50A 3 Pole Miniature Circuit Breaker
New
Quantity
Description
Built for commercial applications, the Eaton CHB350ST is a 3-pole, 50-amp circuit breaker rated 10kAIC at 240VAC. It features a factory-installed 120VAC shunt trip, allowing the breaker to be opened remotely for emergency shutdowns or automated control. This bolt-on unit installs into Cutler-Hammer Type PB and PH panelboards. It utilizes box lug terminals that accommodate 10-1/0 AWG copper or aluminum wiring. The breaker is HACR rated for HVAC equipment and includes a common trip mechanism.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | CHB350ST |
| Series | CHB |
| Amperage | 50A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Frame Type | CHB |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | Cutler-Hammer Type PB Panelboards, Type PH Panelboards |
| Wire Gauge | 10-1/0 AWG (Cu/Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 10 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 | Shunt Trip |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 60C to 75C |
| Construction Features | HACR Rated, Common Trip |
Product FAQs
4 answersWhich panelboards are compatible with the CHB350ST circuit breaker?
This breaker is engineered specifically for Cutler-Hammer Type PB and Type PH panelboards. Because it utilizes a bolt-on connection, it cannot be installed in standard plug-on load centers.
What does the ST suffix indicate on the CHB350ST catalog number?
The ST suffix designates a factory-installed shunt trip. This accessory allows the breaker to be opened remotely via an external voltage signal, which is frequently required for emergency stop circuits or fire alarm system integration.
How do the LI trip functions operate on this thermal magnetic breaker?
The CHB350ST provides fixed long-time (L) and instantaneous (I) protection. The thermal element offers an inverse-time response to safely handle temporary inrush currents while protecting against sustained overloads, and the magnetic element trips immediately upon detecting a short circuit.
Is the CHB350ST rated for HVAC motor loads?
Yes, Eaton CHB miniature circuit breakers are HACR rated. This certifies them to safely handle the unique inrush currents generated by heating, air conditioning, and refrigeration compressors without nuisance tripping.
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 4 reviews.
- MGMark G.Verified BuyerReviewingEaton / Cutler-Hammer CHB350 - 50A 3 Pole Miniature Circuit BreakerI recommend this productRated 4 out of 5 stars4/8/26Was what I needed
This breaker was exactly what I needed. I did not give it 5 starts because it was SUPER expensive for this frame size breaker.
- WBWilliam B.Verified BuyerReviewingEaton / Cutler-Hammer CHB215 - 15A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/5/25Breakers
Work great, fast shipping. Product as advertised. Good site
- HCHb C.ReviewingEaton / Cutler-Hammer CHB215 - 15A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/9/21CHB BREAKER
Excellent Service, Shipping Fast!!!! Super Breakers
- MMMuhammad M.ReviewingEaton / Cutler-Hammer CHB3100 - 100A 3 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars12/19/17Nice!
Good experience, On time and fair price.