Eaton HKD3100Y - 100 A, 600 V, 3-Pole Circuit Breaker | AmpState

Meet the Eaton HKD3100Y—a 100A, 600V, 3-pole molded case circuit breaker designed to deliver reliable branch circuit protection in panelboards and loadcenters. Built to handle the demands of residential, commercial, and light industrial environments, this breaker provides precise, repeatable protection against overloads and short circuits while fitting compact spaces where every amp counts.

Why the HKD3100Y stands out

• Compact molded case design maximizes panel space without sacrificing protection, helping you fit more circuits in tighter electrical enclosures.
• Thermal-magnetic trip unit offers stable, repeatable protection performance, with a predictable trip response to both overloads and short-circuit events.
• 3-pole configuration ideal for 3-phase systems common in commercial and light industrial panels, ensuring balanced protection across all phases.
• 100A, 600V rating supports medium-duty distribution needs while maintaining safe, reliable operation in shared electrical infrastructure.
• OEM compatibility designed to be compatible with matching Eaton OEM loadcenters and panelboards, simplifying replacement and ensuring proper fit and coordination with existing equipment.
• Versatile applications suitable for residential, commercial, and light industrial deployments, making it a practical choice for renovations, upgrades, and new installations alike.

Key specifications

• Manufacturer: Eaton
• Part Number: HKD3100Y
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 100A
• Voltage Rating: 600V
• Number of Poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use cases and scenarios

Upgrade or install new panelboards and loadcenters in office suites, retail spaces, or small-to-medium commercial facilities where reliable 3-phase protection is essential. The HKD3100Y is well-suited for distribution panels that service lighting, receptacles, and machinery circuits, helping prevent damage from overloads and short circuits. For residential electrical systems that require robust 3-pole protection in shared spaces or multi-branch configurations, this breaker delivers consistent performance while maintaining a neat, space-efficient panel layout.

Practical guidance for installation and operation

• Ensure you’re pairing the HKD3100Y with compatible Eaton OEM loadcenters or panelboards to maintain coordinated protection and warranty alignment.
• Verify system voltage and load requirements match the 600V rating and 100A capacity to avoid nuisance trips or undersized protection.
• Plan for future expansion: the compact design helps conserve panel space, making it easier to add circuits as the facility evolves.

Who benefits

• Electrical contractors installing or upgrading commercial or light industrial panels.
• Facilities managers maintaining office buildings, retail spaces, or small manufacturing sites.
• Qualified technicians replacing aging or incompatible breakers in OEM panelboards.

With the Eaton HKD3100Y, you gain dependable, space-conscious protection that aligns with your existing Eaton ecosystem while delivering precise overcurrent and short-circuit protection across three phases. It’s a practical, durable solution designed to keep electrical systems safe, compliant, and ready for everyday demand.