CHB340 - 40Amp Circuit Breaker
- 40 Amp
- 10k @ 240VAC
- 3 Pole
Purchase Options: Brand New
CHB340 - 40Amp Circuit Breaker Description
CHB340 - 40Amp Circuit Breaker
The Eaton CHB340 is a 40 Amp, three-pole circuit breaker used in Eaton CH Loadcenters, and it’s typically chosen when you need a direct replacement that matches what’s already installed in the panel. It’s built for 240V three-pole circuits where all three legs need to trip together, and it installs into compatible CH panels using a plug-in design that keeps everything aligned with the existing setup.
In real-world use, this breaker is commonly found in residential and light commercial systems handling smaller three-pole 240V circuits. Most of the time, it’s not about changing anything in the system—it’s about swapping in a matching breaker so the panel continues running the way it was originally set up. Inside, the CHB340 uses a thermal magnetic trip system, which responds to both overloads and short-circuit conditions. It’s rated at 10 kAIC, which fits typical fault levels found in standard CH residential and light commercial installations. With support for #8–4 AWG wire, it works well for small-to-medium three-pole circuits that still need all poles to trip at the same time.
At the end of the day, the CHB340 is a direct replacement breaker for Eaton CH Loadcenters. It’s meant to keep existing systems consistent and properly matched, without changing the panel layout or creating compatibility issues.
Key Features and Benefits
- 40 Amp, 3-pole breaker for Eaton CH Loadcenters
- Designed for 240V three-pole circuits
- Plug-in installation for compatible CH panels
- Thermal magnetic protection for overloads and short circuits
- 10 kAIC interrupt rating for standard fault conditions
- Compatible with #8–4 AWG conductors
- Three-pole switching for simultaneous disconnect
- Keeps original CH panel layout unchanged
- Common in residential and light commercial systems
- Direct replacement for existing CH breakers
Technical Specifications
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Catalog Number: CHB340
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Product Type: Thermal magnetic circuit breaker
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Type: CHB
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Amperage Rating: 40 Amps
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Voltage Rating: 240V AC
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Number of Poles: 3
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Interrupt Rating: 10 kAIC
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Wire Size: #8–4 AWG
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Mounting Style: Plug-in (Eaton CH Loadcenters)
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Dimensions: 3.3 in D x 3.3 in H x 3.3 in W
- Weight: 0.6 lb
Material Compliance and Certifications
- The Eaton CHB340 is UL 489 listed, meeting standard safety requirements for branch circuit protection. It is intended for installation in Eaton CH Loadcenters and should be installed by a qualified electrician following applicable electrical codes and safety requirements.
Where It Works Best
- Eaton CH Loadcenters
- Residential electrical panels
- Light commercial electrical systems
- Three-pole 240V branch circuits
- Replacement of existing CH 40A breakers
- Maintenance work in installed CH systems
- Circuits requiring all poles to trip together
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Eaton®, Cutler-Hammer®, Westinghouse®, Challenger®, Bussmann®, Crouse-Hinds®, and Cooper® are registered trademarks of Eaton Corporation plc. Products sold are surplus, used, or refurbished and are NOT supplied by Eaton Corporation plc or its affiliates.
Specifications
- Width:2.25
- Height:3.0
- Depth:2.5
- Poles:3
- Amperes:40
- A.I.C. Rating & Volts:10k @ 240VAC
- Type:CHB
- Approx Dimensions:2.25"W x 3.00"L x 2.50"D
- Additional Notes:Bolt-on style Circuit Breaker
Returns are easy
You may return unused items within 30 days of delivery for a full refund.
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