Square D HJA260404 - 40 A, 2-Pole Plug-In Circuit Breaker | AmpState

Meet the Square D HJA260404 — a dependable 40A, 2-pole plug-in molded case circuit breaker designed to protect your electrical system from overcurrent and short circuits. Built for panelboards and load centers, this unit combines fast installation with reliable, repeatable protection you can count on.

• Fast plug-in connection enables quick installation and effortless replacement, reducing downtime during panel maintenance or upgrades.
• Thermal-magnetic trip unit delivers stable, repeatable protection by accurately responding to overloads and short circuits across a range of operating conditions.
• OEM-load center compatibility ensures a precise fit with matching Square D panelboards and load centers for dependable performance.
• 2-pole, 40A design provides 240-volt protection for essential branch circuits in residential, commercial, and light industrial settings.
• Plug-in molded case construction offers durable, secure mounting in compatible enclosures with long-term reliability.

Ideal use scenarios include safeguarding 240V branch circuits such as heating elements, equipment in small workshops, air conditioning components, water heating circuits, and other residential or light commercial loads. When you need fast replacement or a seamless upgrade path within the same family of Square D devices, the HJA260404 fits the bill every time.

Why choose this breaker? It’s an OEM-grade solution from a trusted brand, designed to work harmoniously with the broader Square D ecosystem. The combination of a plug-in connection and a thermal-magnetic trip mechanism means you get quick serviceability without sacrificing protective accuracy or coordination with other devices in the panelboard. It’s built for durability in real-world environments, from tidy residential panels to busy commercial and light industrial installations.

Technical snapshot

• Manufacturer: Square D
• Part Number: HJA260404
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 40A
• Number of Poles: 2
• Mounting Style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Practical tips for deployment: verify that your panelboard accepts plug-in breakers in the Square D catalog, ensure the circuit’s load aligns with a 40A rating, and perform routine inspections to confirm the trip unit remains responsive. With the HJA260404 in place, you gain a robust safeguard for critical 240V circuits, backed by Square D’s engineering pedigree and compatibility with matching load centers.