Eaton / Cutler-Hammer CHB3090 Miniature Circuit Breaker
- 90A
- 3 Pole
- Bolt-On
Eaton / Cutler-Hammer
CHB3090
Miniature Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
CHB3090
Quantity
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Eaton / Cutler-Hammer CHB3090 - 90A 3 Pole Miniature Circuit Breaker
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Description
Part of the CH family, the Eaton CHB3090 is a 90A, 3-pole miniature circuit breaker designed for commercial power distribution. It utilizes fixed thermal and magnetic trip units to guard against overloads. Designed for a precise fit, this breaker mounts into Cutler-Hammer Type PB and PH panelboards. The bolt-on connection provides enhanced stability, and the lugs accommodate 4-1/0 AWG wire. With a 10 kAIC rating at 240VAC, it includes a common trip function and HACR rating.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | CHB3090 |
| Series | CHB |
| Amperage | 90A |
| 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 | 4-1/0 AWG (Cu/Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 4 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Padlock Attachment |
|---|---|
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 60C to 75C |
| Construction Features | Common Trip |
Product FAQs
6 answersWhich panelboards are compatible with the CHB3090 circuit breaker?
This bolt-on breaker is specifically designed for use in Cutler-Hammer Type PB and Type PH panelboards.
What type of wire can be used with the CHB3090 terminals?
The box lugs accept both copper and aluminum conductors ranging from 4 AWG to 1/0 AWG. Always apply the manufacturer recommended torque during installation to ensure a secure connection.
How does the CHB3090 connect to the panelboard?
It features a bolt-on connection. Unlike plug-on breakers, it must be physically bolted to the panelboard bus, providing a highly secure mechanical and electrical connection for demanding applications.
Can I use this Eaton breaker to replace an older Cutler-Hammer CHB3090?
Yes. Eaton acquired Cutler-Hammer, so modern Eaton CHB3090 breakers are direct replacements for legacy Cutler-Hammer models with the exact same catalog number.
What specialized applications is the CHB3090 rated for?
In addition to standard commercial and residential panels, it is approved for use in marine vessels, IT datacenters, and renewable energy generation systems.
What are the safety requirements for installing a bolt-on CHB breaker?
Installation requires de-energizing the entire panelboard. Because the breaker bolts directly to the bus, working on live equipment poses a severe arc flash and shock hazard. Only licensed electricians should perform this installation.
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