Square D JJA36250U43X - 250 A, 600 V, 3-Pole Plug-In Circuit Breaker | AmpState

The Square D JJA36250U43X is a robust 250 A, 600 V, 3-pole plug-in molded case circuit breaker engineered to safeguard branch circuits in panelboards and loadcenters. Built for fast installs and quick swaps, it minimizes downtime while delivering dependable protection for demanding electrical systems.

• Fast plug-in connection enables quick installation and hassle-free replacement, reducing service time in both new builds and maintenance work.
• Thermal-magnetic trip unit provides stable, repeatable protection that responds to overcurrent and short-circuit conditions, helping prevent equipment damage and nuisance trips.
• OEM-compatible design is engineered to work with matching Square D OEM load centers and panelboards for seamless integration and reliable performance.
• Versatile for multiple sectors suitable for residential, commercial, and light industrial applications where 3-pole, 600 V protection is required.

Technical specifications at a glance

• Manufacturer: Square D
• Part Number: JJA36250U43X
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 250 A
• Voltage Rating: 600 V
• Poles: 3
• Mounting Style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

This breaker excels in situations requiring dependable 3-phase protection for heavy loads, motors, and distribution circuits. Its plug-in design simplifies upgrades and retrofits in panelboards and loadcenters, while the thermal-magnetic trip ensures predictable responses under surge or fault conditions. By choosing the JJA36250U43X, you’re opting for a proven Square D solution that emphasizes durability, quick serviceability, and OEM compatibility without compromising safety or performance.

Who this is for and practical use cases

• Electricians and facilities managers upgrading or maintaining panelboards in commercial spaces, data centers, or light industrial environments.
• Projects that require reliable 3-pole protection at 600 V for 3-phase circuits.
• Specifying a ready-made replacement or spare for existing Square D JJA-series installations to minimize downtime.

With the Square D JJA36250U43X, you get a purpose-built, plug-in circuit breaker that combines fast installation, precise protection, and OEM compatibility—delivering confidence for everyday operations and critical applications alike.