Square D S33661 120V Circuit Breaker, Shunt Trip | AmpState

Meet the Square D S33661 120V Shunt Trip Circuit Breaker — a purpose-built protection device designed for panelboards, load centers, and electrical distribution networks. With a dedicated shunt trip feature, this unit enables remote disconnection for safer maintenance and controlled emergency isolation, all while maintaining reliable, local protection at the point of use.

Why this specific breaker stands out — the S33661 is purposefully chosen for retrofit work and maintenance planning where the part number needs to stay consistent. By keeping the same S33661 footprint and electrical interface, you can streamline replacements, reduce field configuration, and minimize downtime during panel upgrades or service cycles.

Key features that matter in the field

• Shunt Trip capability: Supports remote disconnection via a control signal, enhancing safety during servicing and enabling faster isolation when needed.
• 120V operating voltage: Compatible with standard control circuits and common distribution setups found in many facilities.
• Panelboards and load centers compatibility: Chosen for integration in electrical distribution systems where reliable protection and easy retrofits are essential.
• Trusted brand: Square D, a long-standing name in electrical protection and safety components, delivering consistent performance.
• Availability: Currently offered by AmpState to support quick fulfillment and project readiness.

Practical use cases

• Retrofit projects where exact part numbers must be preserved to fit existing mounting, wiring, and control schemes.
• Maintenance planning that benefits from remote trip capability, allowing safe shutoffs without cycling power to unrelated circuits.
• Safety-conscious installations in facilities that require rapid, controlled isolation for servicing or emergency scenarios.
• Replacement in distribution systems where a consistent, 120V shunt-trip breaker is specified by design documents.

Who should consider the S33661?

Electrical contractors, facilities managers, and maintenance teams responsible for retrofit upgrades, panel replacements, or ongoing distribution protection. If your project calls for a 120V shunt-trip breaker with a fixed part number for reliability and continuity, the S33661 from Square D is a targeted fit.

Specifications at a glance

• Manufacturer: Square D
• Part number: S33661
• Product type: Circuit Breaker
• Voltage: 120V
• Availability: AmpState

If you’re unsure about compatibility with your panel model or control wiring, AmpState is ready to help confirm fit and ensure a seamless installation. This approach keeps your electrical distribution safe, compliant, and ready for the next project phase.