Eaton / Cutler-Hammer CH370ST Miniature Circuit Breaker
- 70A
- 3 Pole
- Plug-On
Quantity
Eaton / Cutler-Hammer CH370ST - 70A 3 Pole Miniature Circuit Breaker
New
Quantity
Description
Integrating remote disconnect capabilities, the CH370ST is a 70-amp, three-pole breaker with a 120VAC shunt trip. It is engineered for commercial environments requiring emergency power shutoff. This plug-on device mounts into Eaton CH load centers, utilizing the 3/4-inch per pole format. It accepts 10-1/0 AWG wire for secure branch connections. Rated for 10kAIC at 240VAC, it delivers reliable thermal-magnetic short-circuit protection.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | CH370ST |
| Series | CH |
| Amperage | 70A |
| Poles | 3 |
| Mounting Style | Plug-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Frame Type | CH |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | Eaton CH Load Centers |
| 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, Handle Lock |
|---|---|
| Accessories | Shunt Trip |
| Standards | UL 489, CSA C22.2 No. 5, HACR |
| Approval | UL, CSA |
| Temp Rating | 60C to 75C |
| Construction Features | Common Trip, HACR Rated |
Product FAQs
6 answersWhat panels are compatible with the CH370ST circuit breaker?
This plug-on breaker is designed exclusively for Eaton and Cutler-Hammer Type CH load centers. It requires three standard 3/4-inch spaces on the panel bus.
What does the ST suffix mean on the CH370ST catalog number?
The ST suffix indicates the breaker includes a factory-installed shunt trip. This feature allows the breaker to be tripped remotely via an external voltage signal, which is typically used for emergency power-off systems or automated safety shutdowns.
What wire sizes are accepted by the CH370ST terminals?
The box lugs accept #10 to 1/0 AWG conductors. The terminals are rated for both copper (Cu) and aluminum (Al) wire.
How does the thermal-magnetic trip unit function on this breaker?
The thermal-magnetic mechanism provides two types of protection. The thermal element offers long-time delay for mild overloads, while the magnetic element provides instantaneous tripping during severe short-circuit conditions.
Are Eaton and Cutler-Hammer CH370ST breakers the same?
Yes. Eaton acquired Cutler-Hammer and continues to manufacture the CH series under the Eaton brand. A new Eaton CH370ST is a direct, authentic replacement for an older Cutler-Hammer breaker with the same part number.
How does the CH370ST indicate a tripped condition?
Type CH circuit breakers trip to the OFF position rather than a middle position. This design helps eliminate nuisance callbacks by making it immediately clear which breaker has tripped.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 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