CHB240 - 40Amp Circuit Breaker

CHB240 - 40Amp Circuit Breaker

The Eaton CHB240 is a 40 Amp, two-pole breaker used in Eaton CH Loadcenters, and it’s typically chosen when you need a straight replacement that keeps an existing panel working the way it was originally laid out. It’s designed for 120/240V circuits where both legs need to trip together, and it fits directly into compatible CH panels using the standard plug-in setup.

In most cases, you’ll find this breaker in residential or light commercial panels handling dedicated 240V circuits or branch circuits that need both conductors protected together. The main idea here is simple: replace like-for-like in CH systems so everything stays consistent and there’s no need to change the panel design.

If you’re replacing an existing CH breaker, it’s usually a quick swap—remove the old one, install the new one, and keep the system running as intended. Inside, the CHB240 uses a thermal magnetic trip mechanism, which handles both overload conditions and short circuits. It responds based on real electrical conditions in the circuit rather than anything complicated or overdesigned. It’s rated at 10 kAIC, which lines up with standard residential and light commercial fault levels.

It also supports #8–4 AWG wire, which is typical for 40 amp branch circuits. The two-pole design makes sure both legs disconnect at the same time, which is exactly what you want for 240V loads or any circuit that shares protection across both conductors.

At its core, the CHB240 is a direct replacement breaker for Eaton CH Loadcenters. It’s built for situations where you just need the right match to keep an existing system working without changing how the panel is set up.

Key Features and Benefits

• 40 Amp, 2-pole breaker for Eaton CH Loadcenters
• Designed for 120/240V branch circuits
• Plug-in installation for existing CH panelboards
• Thermal magnetic protection for overloads and short circuits
• 10 kAIC interrupt rating for standard fault protection
• Compatible with #8–4 AWG conductors
• Two-pole switching for simultaneous disconnect
• Keeps original CH panel layout unchanged
• Common in residential and light commercial systems

Technical Specifications

• Catalog Number: CHB240
  
• Product Type: Thermal magnetic circuit breaker
  
• Type: CHB
  
• Amperage Rating: 40 Amps
  
• Voltage Rating: 120/240V
  
• Number of Poles: 2
  
• Interrupt Rating: 10 kAIC
  
• Wire Size: #8–4 AWG
  
• Mounting Style: Plug-in (Eaton CH Loadcenters)
  
• Dimensions: 2.3 in D x 3.4 in H x 3.7 in W
  
• Weight: 0.9 lb

Material Compliance and Certifications

• The Eaton CHB240 is UL 489 listed, meeting recognized safety standards for branch circuit protection. It is intended for use in Eaton CH Loadcenters and should be installed by a qualified electrician following all applicable electrical codes and safety requirements.

Where It Works Best

• Eaton CH Loadcenters and CH panelboards
• 120/240V residential and light commercial circuits
• Two-pole branch circuits requiring shared disconnect
• Replacement of existing CH series breakers
• Maintenance and repair work in installed CH panels
• Circuits that require both legs to disconnect together
• Situations where matching existing panel layout matters
• Standard protection in established CH systems