Eaton JD3100Y - 100 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Meet the Eaton JD3100Y 100A, 600V, 3-Pole Bolt-On Molded Case Circuit Breaker—engineered for dependable branch circuit protection in panelboards and loadcenters. This unit is purpose-built for residential, commercial, and light industrial environments, delivering precise overcurrent and short-circuit protection with a secure, vibration-resistant bolt-on mounting that stays put where it matters most.

• Secure bolt-on mounting: A rigid bus connection that resists loosening and arcing in busy electrical environments, helping maintain consistent protection over time.
• Thermal-magnetic trip: Dual-sensing protection that reacts quickly to overloads and instantly to short circuits, providing stable, repeatable performance across a range of temperatures.
• 3-pole, 100A, 600V: Ideal for three-phase distribution in common panelboards and loadcenters, capable of handling typical commercial and light industrial circuits up to 600V.
• OEM-compatible design: Specifically matched to Eaton OEM loadcenters and panelboards, simplifying replacements and retrofit installations without compatibility concerns.
• Versatile application: A reliable choice for protecting branch circuits in homes, small offices, retail spaces, and light manufacturing—where consistent protection and easy maintenance matter.

Why the JD3100Y stands out

This breaker isn’t just a component—it's a integrated solution for robust distribution protection. The bolt-on mounting delivers a secure, vibration-resistant connection that preserves circuit integrity in environments where equipment experiences regular movement or vibration. The thermal-magnetic trip unit delivers predictable protection, reducing nuisance trips while still stopping faults fast. With OEM compatibility, you can upgrade or expand existing panels with confidence, knowing the JD3100Y will fit and function as intended in Eaton and compatible panelboards.

Technical specifications

• Manufacturer: Eaton
• Part Number: JD3100Y
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 100 A
• Voltage Rating: 600 V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Practical use cases and guidance

Ideal for upgrading or designing three-phase distribution in small to mid-size facilities. Use the JD3100Y to protect feeders that supply lighting, HVAC equipment, motors, and other critical loads in panelboards and loadcenters. Its bolt-on design makes retrofits smoother in compatible panels, reducing installation time and ensuring a solid mechanical and electrical connection. If you’re replacing aging protection devices or expanding a three-phase system, this 100A breaker provides a reliable balance of protection and performance for everyday operations.

In summary, the Eaton JD3100Y delivers targeted, durable protection for three-phase distribution with a secure mounting, reliable thermal-magnetic protection, and OEM-compatible design—making it a smart, long-term choice for residential, commercial, and light industrial electrical systems.