Siemens QA120AFCCSA 120A 1-Pole 120 V Circuit Breaker Potential Transformer

Siemens QA120AFCCSA is a purpose-built protective solution for 120 V residential and light commercial electrical systems. This 120 A, 1-pole circuit breaker is designed to guard single‑phase circuits against overcurrent, helping electrical panels run safely and reliably. With the exact part number QA120AFCCSA, you’re selecting a device that’s engineered to fit Siemens panels that require this configuration, reducing installation guesswork and ensuring code-compliant protection. What makes this breaker stand out - Precise compatibility: Part Number QA120AFCCSA guarantees a drop-in fit for Siemens panels that call for a 1-pole, 120 V, 120 A protection device, streamlining replacement and upgrades. - Robust, field-tested performance: Siemens engineering underpins consistent trip characteristics and durable contact surfaces, delivering dependable operation over many years of cycling. - Ideal for single‑phase circuits: Perfect for protecting outlets, lighting runs, and other 120 V branch circuits in homes and small businesses. - Clear identification for service calls: The labeling and ratings are printed on the unit for quick verification during installations or inspections. - Ready for metering/system protection setups: The inclusion of “potential transformer” in the product context means it can align with protection and metering schemes that rely on transformer-based monitoring in compatible panels. Key specs at a glance - Current rating: 120 A - Poles: 1 - Voltage rating: 120 V - Part Number: QA120AFCCSA - System context: 1-pole, single‑phase 120 V circuits; suitable for integration with standard Siemens panel configurations Who’s this for - Electricians stocking reliable, ready-to-install 120 V protection devices for residential or light commercial panels - Maintenance teams performing routine panel replacements or upfits that require exact Siemens QA-series breakers - Property owners and facilities managers seeking durable, easy-to-source components for ongoing electrical safety and compliance Use cases and practical tips - Replacement scenario: When a 120 V, single-pole breaker trips or fails, this QA120AFCCSA unit provides a like-for-like replacement that preserves panel continuity and protection characteristics. - New circuit protection: Install in appropriate Siemens panels to safeguard dedicated 120 V circuits such as lighting, receptacle runs, or small-appliance circuits. - System protection alignment: In panels configured with metering or protection schemes that use potential transformers, this breaker fits the required form factor while maintaining reliable overcurrent protection. Safety and compatibility notes - Always verify that your panel listing includes the QA120AFCCSA/QA-series breakers and that a 1-pole, 120 V, 120 A device is appropriate for the circuit. - Follow standard electrical safety practices and applicable codes. If in doubt, consult a licensed electrician to ensure proper sizing, mounting, and wiring. Add this Siemens QA120AFCCSA 120 A, 1-Pole, 120 V circuit breaker to your project or toolkit to ensure exact compatibility, durable protection, and straightforward maintenance for your 120 V electrical distribution needs.