Square D | 994340 | Circuit Breaker | 40A | 3-Pole | 480V | Bolt-On

Square D 994340 circuit breaker is a purpose-built, high-reliability solution for demanding 3‑phase, 480V electrical systems. Designed for maintenance, retrofit, and replacement projects, this 40A, 3‑pole bolt‑on unit delivers precise protection where it matters most in commercial and industrial panels.

• Amperage: 40A
• Poles: 3‑Pole
• Voltage: 480V
• Mounting: Bolt‑On
• Reference number: 994340

Why this Square D breaker stands out:

• —the 994340 part number is the most reliable reference for matching form, fit, and electrical characteristics in 3‑phase, 480V systems.
• Secure bolt-on mounting provides a rigid, vibration‑resistant connection in compatible enclosures, helping maintain consistent protection in busy industrial environments.
• Industry-ready 3‑pole design delivers coordinated protection across all three phases, essential for balanced 3‑phase loads and equipment protection.
• High‑voltage capability tuned for 480V applications, making it suitable for manufacturing lines, data centers, and other heavy‑duty installations.
• Practical for replacements and retrofits when upgrading or restoring panels that require precise specs and a reliable, known‑brand component.

Ideal use cases:

• Replacing a failed or outdated breaker in 480V, 3‑phase industrial panels.
• Retrofit projects where the exact Square D 994340 specification is required to maintain panel compatibility.
• Maintenance outages that demand quick, straightforward substitutions with minimal panel modification.
• Spare parts stocking for service teams managing Square D electrical infrastructure in commercial facilities.

Installation and procurement tips:

• Always confirm fit and ratings before ordering—the part number 994340 is your best reference for compatibility with your Square D panel.
• Ensure the panel and associated bus architecture are rated for 480V and support a 3‑pole bolt‑on breaker of 40A capacity.
• Follow standard electrical safety practices during replacement, including de‑energizing the equipment and verifying no residual voltage on the bus before installation.

Compared to generic substitutes, this Square D unit provides a purpose‑built solution that aligns with existing Square D panels, reducing mismatch risk and installation guesswork. If you’re upgrading or replacing in a 480V, 3‑phase environment, the 994340 bolt‑on breaker is engineered to meet the reliability expectations of industrial applications while simplifying maintenance and service workflows.