Eaton / Cutler-Hammer CH330ST Miniature Circuit Breaker
- 30A
- 3 Pole
- Plug-On
Quantity
Eaton / Cutler-Hammer CH330ST - 30A 3 Pole Miniature Circuit Breaker
New
Quantity
Description
Engineered for commercial control systems, the Eaton CH330ST provides reliable 30A overcurrent protection. This three-pole miniature circuit breaker is designed for applications requiring remote disconnect capabilities, such as emergency stop circuits. It mounts into standard Eaton Type CH load centers, requiring three 3/4-inch spaces. The box lug terminals accept 14-6 AWG copper or aluminum wiring. Rated at 10 kAIC at 240VAC, it features a factory-installed 120VAC shunt trip mechanism.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Series | CH |
| Amperage | 30A |
| Poles | 3 |
| Mounting Style | Plug-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Frame Type | CH |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | Type CH Load Centers |
| Wire Gauge | 14-6 AWG (Cu/Al) |
| Max Wire | 6 AWG |
| Min Wire | 14 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 |
Product FAQs
8 answersWhat panels are compatible with the CH330ST?
The CH330ST is designed exclusively for use in Eaton and Cutler-Hammer Type CH load centers. It features a plug-on mounting style that snaps directly onto the panel bus.
How many panel spaces does the CH330ST require?
This 3-pole breaker requires four standard 3/4-inch spaces in a Type CH load center. Three spaces are used for the breaker poles, and the fourth space accommodates the factory-mounted shunt trip module.
What does the ST suffix in the CH330ST catalog number indicate?
The ST suffix indicates that this breaker is equipped with a factory-installed shunt trip accessory. This allows the breaker to be tripped remotely via an external control signal.
What wire sizes are accepted by the load terminals on this breaker?
The box lug terminals on the CH330ST accept copper (Cu) or aluminum (Al) conductors ranging from 14 AWG to 6 AWG.
How does the thermal-magnetic trip mechanism operate in this breaker?
The thermal-magnetic trip unit provides dual protection. The thermal component responds to prolonged overloads (Long-Time), while the magnetic component reacts immediately to severe short circuits (Instantaneous).
Is this breaker compatible with older Cutler-Hammer panels?
Yes, Eaton and Cutler-Hammer Type CH load centers share the same bus design. The CH330ST is fully compatible with both legacy Cutler-Hammer and modern Eaton Type CH panels.
What does the LI trip function code mean?
The LI code indicates that the breaker provides Long-Time and Instantaneous trip functions. Long-Time protects against sustained overloads, while Instantaneous trips the breaker immediately during a severe short circuit.
Can the trip settings on the CH330ST be adjusted?
No, the CH330ST features a fixed thermal-magnetic trip unit. The Long-Time and Instantaneous trip settings are factory calibrated and cannot be adjusted in the field.
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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