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Eaton / Cutler-Hammer CH280ST Miniature Circuit Breaker
- 80A
- 2 Pole
- Plug-On
Eaton / Cutler-Hammer
CH280ST
Miniature Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
CH280ST
Quantity
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Eaton / Cutler-Hammer CH280ST - 80A 2 Pole Miniature Circuit Breaker
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Description
Providing advanced control for commercial and industrial setups, the Eaton CH280ST combines an 80A, two-pole thermal-magnetic breaker with a factory-installed 120VAC shunt trip. This allows the circuit to be opened remotely via an external signal. The plug-on unit is built to fit Eaton and Cutler-Hammer Type CH panelboards. Due to the integrated shunt trip accessory, it requires one additional 3/4-inch pole space. Rated for 10kAIC at 120/240VAC, it features a quick-make/quick-break mechanism.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | CH280ST |
| Series | CH |
| Amperage | 80A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Frame Type | CH |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | Eaton CH Loadcenters |
| 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 |
| Available Options | Padlock Attachment |
|---|---|
| Accessories | Shunt Trip |
| Standards | UL 489, HACR |
| Approval | UL |
| Temp Rating | 60C to 75C |
| Construction Features | Common Trip, HACR Rated, Quick-Make/Quick-Break, Trip-Free Mechanism |
Product FAQs
7 answersWhat loadcenters are compatible with the Eaton CH280ST?
The CH280ST is designed exclusively for use in Eaton and legacy Cutler-Hammer Type CH loadcenters. It utilizes a 3/4-inch per pole plug-on mounting design.
What does the ST suffix indicate on the CH280ST circuit breaker?
The ST suffix indicates that the breaker includes a factory-installed shunt trip. This feature allows the breaker to be tripped remotely by applying an external control voltage, commonly used for emergency shutdowns or fire alarm system integration.
How is the shunt trip wired on the CH280ST?
The factory-installed shunt trip features two black pigtail leads that are not polarity sensitive. One lead connects to the control voltage source, and the other connects to a normally open (NO) contact, such as a momentary push button or relay, to complete the circuit.
What type of control signal is required to activate the shunt trip on the CH280ST?
The shunt trip requires a momentary application of external control voltage to trigger the breaker. This is typically achieved by wiring the shunt trip leads through a normally open (NO) set of contacts, such as a momentary push button or a fire alarm relay.
Can I field-install a shunt trip on a standard 80A Type CH breaker?
No. For Eaton Type CH miniature circuit breakers, the shunt trip mechanism is only available as a factory-installed option. It cannot be added to a standard breaker in the field.
What safety precautions apply when wiring the CH280ST shunt trip?
Always ensure the control voltage source is de-energized before wiring the shunt trip leads. The shunt trip circuit must be wired according to local electrical codes, typically requiring a dedicated control power source or integration with a certified fire alarm control panel.
Can the Eaton CH280ST replace older Cutler-Hammer breakers?
Yes, Eaton acquired Cutler-Hammer, and the CH280ST is a direct, UL-listed replacement for older Cutler-Hammer Type CH breakers with the same specifications and shunt trip requirement.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 74 reviews.
Total 5 star reviews: 72 Total 4 star reviews: 2 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
Reviews Summary
Generated by AI from 100 most recent customer reviews
Last updated 8/5/25
Customers say these electrical breakers are readily available when hard to find elsewhere. Many reviews mention fast shipping and accurate order fulfillment. Common feedback includes competitive pricing and proper packaging. Reviews note the products fit correctly and match specifications. While most highlight quick delivery times, some mention occasional supply delays. The ordering process receives praise for its simplicity.
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Rating
74 reviews
- JGJason G.Verified BuyerReviewingEaton / Cutler-Hammer CH220GFI - 20A GFCI Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/24/26It was as advertised
It was delivered on time and works.
- LGlarry g.Verified BuyerReviewingEaton / Cutler-Hammer CH335 - 35A 3 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars7/20/26good
Great part quick shipping
- PLPhid L.Verified BuyerReviewingEaton / Cutler-Hammer CH230GFI - 30A GFCI Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars7/7/26EFFICIENT
BREAKER ARRIVED QUICKLY. WELL PACKAGED FOR PROTECTION.
- CSChristine S.Verified BuyerReviewingEaton / Cutler-Hammer CH2100-LONG - 100A 2 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars5/18/26Got a great refurbished breaker - saved a $6500 Service Replacement
When our main breaker frizzed out, the option we were presented with was replacing the entire panel and service due to the type and part - no longer produced for replacement parts. It would be a $6500 replacement.
We'll likely have to do it at some point but, for now, the replacement breaker we were able to source from Superbreakers (with a $25 warranty) was $5900 less expensive. installation ran a few hundred dollars and the tech said the part looked to be in excellent condition and was prepped for install as he would have hoped.
Very thankful for SuperBreakers!
- MKMichael K.Verified BuyerReviewingEaton / Cutler-Hammer CH330 - 30A 3 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars4/22/26Happy Customer
Arrived as described and in the timeframe