Siemens ED61B045 - 45 A, 600 V, 1-Pole Bolt-On Circuit Breaker | AmpState

Meet the Siemens ED61B045—a purpose-built 1-pole, 45A molded case circuit breaker designed to protect branch circuits with precision and reliability. This bolt-on version is engineered for a secure, vibration-resistant connection to your panelboard or load center, delivering dependable overcurrent and short-circuit protection in everyday electrical installations.

What makes the ED61B045 stand out

• Secure bolt-on mounting—a rigid bus connection minimizes movement and electrical noise, helping maintain consistent protection even in environments with vibration or footprint shifts.
• Thermal-magnetic trip unit—combines thermal and magnetic sensing for stable, repeatable trip performance across temperature changes and fault conditions.
• OEM-compatible design—specifically suited for use with Siemens OEM load centers and panelboards, ensuring a clean, reliable fit when replacing or upgrading existing breakers.
• Versatile protection—ideal for residential, commercial, and light industrial applications that require dependable branch circuit protection and fast fault interruption.

Who is this ideal for

• Electrical contractors upgrading or maintaining panelboards and load centers in small to mid-size commercial spaces.
• Home electricians performing service upgrades or equipment replacements in residential settings with Siemens-compatible infrastructure.
• Facilities managers seeking a durable, easy-to-install solution for light industrial circuits that demand reliable overcurrent protection.

Why this matters in real-world use

The ED61B045 isn’t just a generic breaker. Its bolt-on mounting and secure bus connection reduce the risk of loose connections that can cause nuisance trips or arcing. The thermal-magnetic trip unit responds swiftly to short circuits while maintaining a predictable, non-nuisance trip curve for overloads, helping protect wiring and connected equipment. Being compatible with matching Siemens OEM panels means smoother installations, fewer compatibility surprises, and streamlined maintenance down the line.

Technical specifications

• Manufacturer: Siemens
• Part Number: ED61B045
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 45A
• Voltage Rating: 600V
• Number of Poles: 1
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Installation, compatibility, and practical tips

• Ensure you’re pairing this breaker with a Siemens-compatible panelboard or load center to guarantee fit and coordinated trip characteristics.
• When mounting, verify that the bolt-on connection is tightened to the manufacturer’s recommended torque to maintain a solid bus contact and minimize vibration.
• Use this breaker for circuits where reliable protection against overloads and short circuits is critical—think lighting branches, receptacle circuits, and small motor loads in protected areas.
• For maintenance, test the trip function periodically and replace any breakers showing signs of wear, corrosion, or inconsistent trip behavior.
• Always follow local electrical codes and have a qualified professional perform installations or replacements to ensure safety and code compliance.