Square D SDT240 - 40A, Circuit Breaker

Square D SDT240 40A Circuit Breaker delivers reliable, intelligent protection for your electrical distribution system. Built for rugged industrial and commercial environments, this 40-amp breaker guards wiring and equipment from overloads and short circuits, helping you avoid costly downtime and equipment damage.

Designed for use in panelboards, switchboards, control panels, and OEM equipment, the SDT240 fits right into your existing protection strategy. Its focused 40A rating makes it ideal for feeder and branch-circuit protection in a wide range of applications, from production lines to commercial electrical rooms and turnkey OEM assemblies.

Key benefits

• Precise 40A protection ensures circuits stay within safe operating limits while preventing nuisance trips on normal startup surges.
• Versatile installation compatible with panelboards, switchboards, control panels, and OEM equipment, streamlining upgrades and new builds alike.
• Dependable protection in critical spaces designed to keep distribution panels and motor control centers running smoothly, with minimal maintenance.
• Brand-backed reliability Square D is trusted for consistent performance in demanding environments, helping you standardize protection across multiple projects.

Use cases

• Installing or upgrading a factory distribution panel where a clean, single-point 40A protection device is needed.
• Integrating into motor control centers to safeguard feeders and control circuits from overloads during peak operation.
• Replacing aging breakers in control panels within OEM equipment to restore reliable protection and safe operation.
• Specifying for commercial electrical rooms where robust, easy-to-source protection components are prioritized.

Why this matters

In any setup where electrical loads fluctuate or machines start up frequently, a dependable circuit breaker is the line between smooth operation and disruptive outages. The SDT240’s 40A rating provides a balanced protection level for common control panels and distribution circuits, while its construction supports long service life in challenging environments.

Specifications at a glance

• Current rating: 40A
• Breaker type: Circuit Breaker
• Applications: Panelboards, switchboards, control panels, and OEM equipment
• Ideal for: Industrial, commercial, and OEM protection in distribution panels and motor control centers

Choose the Square D SDT240 40A Circuit Breaker to unify protection across your electrical infrastructure, reduce downtime, and simplify maintenance with a trusted, purpose-built device engineered for performance where it counts.