Eaton CHB320 Circuit Breaker - UL 489 Certified
Part Number: CHB320
Quick Summary
The Eaton CHB320 thermal magnetic circuit breaker protects CH loadcenters in electrical panels for 240 V systems. Installers frequently face nuisance trips and wiring mismatches when expanding to three-pole protection in compact spaces. UL 489 certification with manufacturer confirmation ensures code compliance and predictable performance, including a 10 kAIC interrupt rating for robust fault handling. Using the CHB320 in CH Loadcenters translates to faster installations, fewer field adjustments, and improved uptime for industrial electrical protection programs. In terms of value, this device supports #14-8 AWG wiring and a 6 x 4 x 2 inch footprint, simplifying retrofit into existing panels. With a limited lifetime warranty and documented UL 489 compliance, engineers can reduce sourcing risk while meeting stringent safety standards.
Product Information
Extended Description
CHB320 Eaton: Type CHB Circuit Breaker, 20A, Three-pole, 240V, 10 kAIC, #14-8 AWG wire size
Product Name
Eaton CH thermal magnetic circuit breaker
Catalog Number
CHB320
UPC
782113112596
Product Length/Depth
6 in
Product Height
2 in
Product Width
4 in
Product Weight
1 lb
Warranty
Limited lifetime
Certifications
UL 489 Contact Manufacturer
Used with
CH Loadcenters
Type
Circuit breaker
Amperage Rating
20 A
Voltage rating
240 V - 240 V
Circuit breaker type
CHB
Interrupt rating
10 kAIC
Wire size
#14-8 AWG
Number of poles
Three-pole
Feature: Thermal magnetic protection provides precise overcurrent sensing and fast disconnection, minimizing nuisance trips while protecting connected equipment. Business Impact: Improves line reliability and reduces unplanned downtime in critical automation loops. Application: Ideal for CH Loadcenters supporting industrial controls and motor circuits. The CHB320 is compatible with standard 240 V distribution networks, enabling straightforward integration into existing panel architectures. Feature: Three-pole design delivers synchronized protection across all phases in a 3-phase panel, ensuring balanced interrupt behavior. Business Impact: Enhances safety, reduces arc-flash exposure, and simplifies coordination with downstream protection schemes. Application: Suitable for manufacturing lines and process automation where three-phase protection is required. Feature: 20 A amperage rating with a 10 kAIC interrupt rating provides robust fault handling for moderate-to-high inrush and short-circuit scenarios. Business Impact: Supports reliable protection for motor starters and control circuits, reducing equipment damage and downtime. Application: Common in CH Loadcenters serving industrial drives and HVAC controls. Feature: Wire size compatibility of #14-8 AWG streamlines field wiring, improving install speed and reducing termination errors. Business Impact: Cuts installation time, lowers labor cost, and improves wiring consistency across panels. Application: Suitable for feeders and branch circuits in enclosed control panels. Feature: Compact footprint (6 in L x 4 in W x 2 in H) and 1 lb weight facilitate retrofit and space-constrained installations. Business Impact: Enables easier replacement and clearance in crowded switchgear enclosures. Application: Ideal for retrofits in existing CH Loadcenters and compact control cabinets. Feature: UL 489 certification (manufacturer-verified) ensures regulatory compliance and safer operation. Business Impact: Streamlines procurement, supports audits, and aligns with electrical safety standards. Application: Essential for compliance-driven projects in industrial facilities.
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FAQs
To install the CHB320, ensure the loadcenter is rated for 240 V and equipped for CHB-type breakers. Mount the three-pole device securely, connect conductors using #14-8 AWG within the listed torque specs, and verify alignment with neighboring poles. Confirm wiring polarity and tighten terminations to prevent loose connections, then test with a lockout/tagout procedure before energizing the circuit.
The CHB320 is a 20 A, three-pole circuit breaker rated for 240 V with a 10 kAIC interrupt rating. This combination supports protection for typical CH Loadcenter circuits, motor controllers, and automation panels. Its thermal magnetic trip mechanism balances nuisance-trip resistance with fast fault clearance, ensuring reliable operation in industrial environments.
Yes. CHB320 is designed as a three-pole breaker for CH Loadcenters, making it suitable for three-phase industrial panels and motor circuits operating at 240 V. Its 10 kAIC interrupt rating provides robust short-circuit protection, while its wiring range supports standard control and feeder conductors. Always verify panel compatibility with Eaton documentation before installation.
CHB320 carries UL 489 certification, with manufacturer verification available for confirmation. This ensures the device meets recognized safety and performance standards for industrial power distribution. Always reference the product datasheet and Eaton’s warranty/warranty terms to confirm current certification status and applicability to your jurisdiction.
The CHB320 comes with a limited lifetime warranty, reducing long-term replacement costs for steady-state operation. In production environments, periodic visual inspections and torque checks on terminations are recommended to maintain reliability. Its high interrupt rating and compact design contribute to extended panel life, lower downtime, and favorable total cost of ownership in automation and process control applications.