Eaton QHCX3055H Miniature Circuit Breaker - UL Listed
Part Number: QHCX3055H
Quick Summary
The Eaton QHCX3055H miniature circuit breaker protects electrical circuits in control panels and machine feeders. Engineers often struggle with nuisance trips, space constraints, and downtime when protecting motors and feeders, and this unit helps address those challenges with reliable thermal-magnetic protection in a compact three-pole form. UL Listed and CSA Certified for North American compliance, it also carries a robust 42 kAIC interrupt rating and 240 V operating range, ensuring safer operation in demanding environments. With a compact footprint and a straightforward replacement path, it supports efficient panel design, predictable maintenance, and improved overall equipment effectiveness in automation settings.
Product Information
Extended Description
QHCX3055H Eaton: Eaton Quicklag Type QHCX Industrial Miniature Thermal-Magnetic Circuit Breaker,Miniature circuit breaker,55 A,42 kAIC,Three-pole,240 V,Thermal-magnetic,QHCX
Product Name
Eaton QC thermal magnetic circuit breaker
Catalog Number
QHCX3055H
UPC
786679009369
Product Length/Depth
2.9 in
Product Height
4.8 in
Product Width
1 in
Product Weight
3.4 lb
Warranty
1 year
Certifications
UL Listed CSA Certified
Circuit breaker type
QHCX
Number of poles
Three-pole
Type
Miniature circuit breaker
Amperage Rating
55 A
Interrupt rating
42 kAIC
Trip Type
T268
Voltage rating
240 V - 240 V
Feature: Thermal-magnetic trip mechanism provides simultaneous overload and short-circuit protection. Business Impact: minimizes nuisance trips and cascading faults, improving line uptime and reducing unplanned maintenance costs. Application: ideal for 3-phase 240 V feeders in automation panels and machine centers. Feature: Three-pole, compact footprint (2.9 in L x 1 in W x 4.8 in H) with a 3.4 lb weight. Business Impact: easier installation in tight control panels, lower enclosure crowding, and faster replacement during maintenance. Application: suitable for space-constrained industrial enclosures and retrofits. Feature: 55 A amperage rating with 42 kAIC interrupt capacity. Business Impact: strong fault-current handling reduces equipment damage and downtime; supports reliable motor and line protection. Application: protection for heavy-load automation feeders and conveyors. Feature: UL Listed and CSA Certified. Business Impact: simplifies regulatory compliance and procurement approvals across North America; reduces validation cycles. Application: preferred choice for OEMs and panel builders targeting compliant installations. Feature: 240 V operating voltage with T268 trip type. Business Impact: precise coordination for balanced three-phase systems; improves selectivity and reduces unnecessary trips. Application: motor starters, machines, and control circuits in automated lines.
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FAQs
The QHCX3055H is a three-pole miniature circuit breaker rated for 240 V and 55 A, with a compact footprint (2.9 in L × 1 in W × 4.8 in H) and a weight of 3.4 lb. It is designed for standard industrial panels and panelboards, offering reliable protection in control and automation applications without requiring specialized mounting hardware. Its catalog number QHCX3055H ensures straightforward replacement when updating existing installations.
QHCX3055H uses a thermal-magnetic trip mechanism to deliver both overload and short-circuit protection. With a 55 A rating and a 42 kAIC interrupt capacity, it protects circuits and connected motors from sustained faults while limiting arc energy and equipment damage. The T268 trip type enhances selectivity, reducing nuisance trips in dynamic automation loads.
Yes. The QHCX3055H holds UL Listed and CSA Certified approvals, aligning with North American electrical safety standards. These certifications simplify compliance during design reviews and aid in vendor qualification, enabling quicker approvals for panel builds in manufacturing, packaging, and process industries.
Plan for a three-pole 240 V protection point with a 55 A load rating and 42 kAIC interrupt capacity. The compact size supports tight panel layouts, and the unit’s catalog-based replacement path reduces downtime during maintenance. Ensure correct wiring polarity and three-phase balance to maximize protection, and verify enclosure suitability for three-pole devices in your control system.
Using the QHCX3055H can reduce unplanned downtime through reliable thermal-magnetic protection and lower nuisance trips, especially in motors and conveyors. The 42 kAIC rating accommodates high fault currents, protecting downstream equipment and extending service life. Combined with regulatory compliance (UL Listed, CSA Certified) and a 1-year warranty, this breaker supports lower total cost of ownership in automation installations.