Eaton / Cutler-Hammer EHB1100 Molded Case Circuit Breaker
- 100A
- 1 Pole
- Bolt-On
Quantity
Eaton / Cutler-Hammer EHB1100 - 100A 1 Pole Molded Case Circuit Breaker
New
Quantity
Description
Serving as a 100A solution, this 1-pole E-Frame MCCB provides overcurrent protection for 277VAC commercial systems using fixed thermal-magnetic trip elements. Engineered for bolt-on installation, it mounts into Eaton Pow-R-Line 4B and legacy Westinghouse panelboards. Facilities can substitute this unit with the modern EHD1100. The breaker features a 14kAIC rating at 277VAC to safely clear faults. Its HACR designation ensures compliance when protecting heavy-duty HVAC loads.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | EHB1100 |
| Series | EHB |
| Amperage | 100A |
| Poles | 1 |
| Mounting Style | Bolt-On |
| Voltage | 277VAC, 125VDC |
| Phase | 1 |
| AIC Rating | 14kA @ 277VAC, 10kA @ 125VDC |
| Frame Type | EHB |
|---|---|
| Terminal Type | Lugs |
| For Use With | Eaton Pow-R-Line 4B Panelboards, Westinghouse Panelboards |
| Wire Gauge | 14-1/0 AWG |
| Max Wire | 1/0 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Load Side Lug Terminals |
| Standards | UL 489, CSA C22.2 No. 5.1, NEMA AB 1 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Non-Interchangeable Trip |
Product FAQs
7 answersWhich panelboards accept the EHB1100 circuit breaker?
This E-Frame breaker is designed to bolt directly into Eaton Pow-R-Line 4B panelboards as well as legacy Westinghouse panelboards.
Is the Eaton EHB1100 still in active production?
The EHB series is a legacy product line that has been phased out by the manufacturer. For a modern replacement, facilities can substitute this unit with the Eaton EHD1100 molded case circuit breaker.
What is the required wire size for the EHB1100 terminals?
The factory lugs on this breaker accept wire gauges from 14 AWG up to 1/0 AWG. Always verify that the wire material and size match the load requirements and are torqued to the manufacturer specifications.
How does the thermal-magnetic trip unit operate on the EHB1100?
The breaker features fixed Long-Time and Instantaneous (LI) trip functions. The thermal component responds to sustained overcurrents by heating a bimetallic strip, while the magnetic component reacts instantly to high-level short circuits.
Is the EHB1100 rated for direct current (DC) systems?
Yes, while primarily used in 277VAC commercial systems, this breaker is also rated for 125VDC applications, providing a 10kA interrupting capacity for DC control circuits and loads.
Is the EHB1100 suitable for HVAC applications?
Yes, this breaker carries an HACR designation, meaning it is tested and approved for use with heating, air conditioning, and refrigeration equipment loads.
What precautions are necessary when installing the EHB1100?
Installation must be performed by a qualified electrician. Because this is a bolt-on breaker, the panelboard must be completely de-energized before mounting the unit to the busbar to prevent arc flash hazards and ensure a secure mechanical 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 4.8 out of 5 based on 19 reviews.
- TSThomas S.Verified BuyerReviewingSquare D EHB24060 - 60A 2 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars2/28/26President NGE
The quality is excellent, but you need to double check when you order that the corrected one gets delivered
- MDMitchell D.Verified BuyerReviewingSquare D EHB14020HID - 20A 1 Pole Molded Case Circuit BreakerI recommend this productRated 4 out of 5 stars2/4/26Hard to find
Super breakers has just what I was looking for when no one else did!!
- MSMike S.Verified BuyerReviewingSquare D EHB34060 - 60A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars11/21/25Fast reliable service, reasonable prices
I recently ordered the incorrect breakers for a job, but I contacted Drew at SuperBreakers and he got me the correct breakers shipped out that day, which I received the next day. He sent me a label to send the wrong breakers back, and I was quickly refunded a restocking fee that I incurred for my mistake. I was able to get the breakers installed, and the power running to meet the deadline. Not to mention, the price was better than I found elsewhere. Thanks Drew!
I would definitely recommend this company if you need fast, reliable service for your electrical product needs. And I'm sure I will use them again.
Thank you SuperBreakers! Nice job Drew!
- DTDavid T.ReviewingSquare D EHB14020 - 20A 1 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars12/12/23Everything worked out perfect thanks
Everything worked out perfect thanks again
- GCGULF C.ReviewingSquare D EHB34020 - 20A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars7/5/23Perfect condition
This breaker arrived as advert and timely. Perfect condition. Good working condition