Eaton QBH50 50A 1-Pole 120 V Circuit Breaker Potential Transformer

The Eaton QBH50 50A 1-Pole 120 V Circuit Breaker is a compact, dependable solution designed to protect your 120-volt circuits with precision. Part Number QBH50, this device is built to fit standard 1-pole slots and deliver reliable overcurrent protection for residential or light commercial panels, with a 50-amp rating that makes it suitable for higher-demand circuits. The inclusion of “Potential Transformer” in the product lineage hints at compatibility with monitoring-friendly setups while keeping a straightforward, plug-and-play form factor for everyday electrical protection.

Key specifications

• Current rating: 50 A
• Pole configuration: 1-Pole
• Voltage rating: 120 V
• Part Number: QBH50

Why this breaker stands out

• Dedicated 50 A protection for high-demand 120 V circuits, helping prevent overloads and reduce the risk of fire hazards.
• 1-Pole configuration delivers straightforward installation in compatible panels that require a single hot line, making it ideal for specific branch circuits.
• Reliable Eaton lineage—part of the QBH family—designed for consistent performance, easy replacement, and predictable trip behavior when protection is needed.
• Compact, practical design that fits standard panel spaces without unnecessary bulk, simplifying upgrades or panel refurbishments.
• Versatile compatibility with systems that leverage potential-transformer monitoring, offering a practical path for panels that integrate metering or protective-relay equipment.

Ideal use scenarios

Use the QBH50 when you need dependable overload protection for a single, important 120 V circuit in a residential or light commercial panel. It’s well-suited for high-draw appliances or equipment runs where a robust 50 A-capable input is necessary. If your setup includes monitoring equipment or metering that expects a transformer-enabled protection path, this breaker’s design aligns with those needs while remaining straightforward to install and maintain.

Installation and compatibility tips

Ensure your electrical panel accepts 1-Pole breakers of the QBH family and that the circuit you’re protecting matches the 50 A rating. Follow all applicable electrical codes and manufacturer instructions during installation, and if in doubt, consult a licensed electrician. This breaker is designed to slot into compatible Eaton panels, delivering reliable protection with minimal fuss.

Practical insights

Beyond basic specs, the QBH50 offers predictable performance in demanding 120 V circuits. For long-term reliability, pair it with properly rated conductors and secure, code-compliant connections. If you’re upgrading an existing panel, verify slot compatibility and ensure the replacement breaker aligns with the panel’s listed configurations to maintain system safety and warranty integrity.