Siemens 5SX2203-7 - 3A, 400VAC, Circuit Breaker

Engineered for industrial reliability, the Siemens 5SX2203-7 delivers precise 3 A overcurrent protection up to 400 V AC, making it an essential component in panelboards, switchboards, control panels, and OEM equipment. This breaker is built to safeguard valuable wiring and equipment while keeping downtime to a minimum.

Designed to guard sensitive circuits and motor control centers, the 5SX family device provides fast, predictable tripping behavior that interrupts fault conditions before damage occurs. With the 3 A current rating and 400 VAC capability, it suits a wide range of industrial and commercial applications where dependable protection is critical.

Why the Siemens 5SX2203-7 stands out

• Exact 3 A current rating tailored for protecting low-load control circuits and smaller motors without nuisance trips in everyday operation.
• 400 VAC voltage rating optimized for common industrial power distribution environments, ensuring reliable performance across panels and switchgear.
• Part of the Siemens 5SX family for seamless integration with panelboards, switchboards, and other Siemens protection devices, simplifying installation and maintenance.
• Thermal-magnetic trip mechanism provides both overload protection and short-circuit response, helping prevent equipment damage and extend component life.
• OEM-friendly and traceable with a dedicated part number (5SX2203-7) that supports easy ordering, stocking, and service in configured assemblies.

Ideal use cases

• Panelboards, switchboards, and control panels in manufacturing facilities where reliable overcurrent protection is essential.
• Motor control centers and automation cabinets that require precise trip characteristics to protect wiring and starters.
• OEM equipment assemblies that are designed around Siemens protection strategies and compatible with the 5SX line.
• Distribution circuits in commercial environments needing robust, consistent circuit protection for critical loads.

Practical installation and care tips

• Verify that the protected circuit operates at or below the 3 A rating to prevent nuisance trips and ensure dependable performance.
• Confirm compatibility with your 400 VAC supply and ensure wiring and conductors meet applicable standards for the current and voltage.
• Integrate with other Siemens 5SX components to maintain cohesive protection across panels and control systems.

Technical snapshot

• Current rating: 3 A
• Voltage rating: 400 VAC
• Breaker type: Circuit Breaker
• Applications: panelboards, switchboards, control panels, OEM equipment