Square D | A1B150 | Circuit Breaker | 50A | 1-Pole | 120V | Bolt-On

Square D A1B150 Circuit Breaker delivers dependable overcurrent protection for 50-amp, 120-volt circuits in a compact, single-pole package. Built for maintenance, retrofit, and replacement projects, this bolt-on breaker helps you restore safe operation in compatible panels without unnecessary downtime.

Key specifications at a glance

• Amperage: 50 A
• Poles: 1-Pole
• Voltage: 120 V
• Mounting: Bolt-On
• Brand/Part: Square D • A1B150

Designed for maintenance, retrofit and replacement

When a circuit breaker fails or a retrofit is required, the A1B150 provides a reliable, drop-in replacement that matches the original specifications. The bolt-on design offers a secure, vibration-resistant connection, helping maintain consistent electrical protection in demanding environments. Use this part to restore proper tripping behavior and protect wiring and connected devices on 50-amp circuits.

Compatibility you can trust

For ordering confidence, rely on the part number A1B150 as the primary reference. Always confirm the fit and ratings before purchasing to ensure seamless integration with your panel and existing wiring. This breaker is intended for Square D installations that support bolt-on mounting and 1-pole, 120V protection.

Practical use cases

• Replacing a failed or worn 50A, 1-pole breaker in residential or light commercial panels
• Retrofit projects where a like-for-like 120V, 50A protection device is required
• Maintenance of aging electrical panels that demand reliable, code-compliant overcurrent protection

Why bolted-on mounting matters

• Secure mechanical attachment reduces the risk of loose connections in busy electrical rooms or vibration-prone installations
• Coupled with a robust electrical rating, it provides consistent protection for branch circuits against overloads
• Designed to integrate with compatible Square D panels, supporting straightforward installation and long-term reliability

Ready to complete your electrical protection setup? Add the Square D A1B150 Circuit Breaker to your cart and trust in a proven, mid-range solution for maintaining safe, efficient 120V circuits.