Siemens ED41B045L - 45 A, 120 V, 1-Pole Circuit Breaker | AmpState

Meet the Siemens ED41B045L 45A, 120V, 1-Pole Molded Case Circuit Breaker — a compact, dependable choice for safeguarding your electrical system. Designed for use in panelboards and load centers, this single-pole breaker delivers precise protection for individual branch circuits while maximizing space in your panel.

Key benefits that matter in real-world setups

• Space-efficient design: The molded case form factor fits snugly in panelboards and load centers, helping you optimize panel capacity without compromising protection.
• Thermal-magnetic trip unit: Combines thermal (overload) and magnetic (short-circuit) protection for stable, predictable operation and quick response to faults.
• Exact compatibility: Engineered to work with matching OEM Siemens load centers and panelboards, ensuring a reliable, uniform protection system.
• Versatile for multiple environments: Suitable for residential, commercial, and light industrial applications where a 1-pole, 120V breaker is needed.

What it protects and where to use it

This ED41B045L serves as branch circuit protection, preventing damage from overloads and short circuits on single-phase 120V circuits. It’s ideal for protecting outlets, lighting runs, small equipment circuits, and other 120V loads in homes, offices, workshops, and light commercial spaces. Use it when you need a reliable 45A rating on a single hot conductor with a compatible Siemens panel installation.

Technical specifications at a glance

• Manufacturer: Siemens
• Part Number: ED41B045L
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 45A
• Voltage Rating: 120V
• Number of Poles: 1
• Application: Branch circuit overcurrent and short-circuit protection

Installation tips and practical guidance

To get the most reliable performance, pair this breaker with a matching Siemens load center or panelboard. Verify that your panel’s labeling supports a 45A, 1-pole device and that the overall panel ampacity can accommodate a 45A branch circuit. When replacing an existing breaker, ensure the new ED41B045L fits the same mounting type and fits within the panel’s listed operating conditions. For optimal operation, keep wiring clean and properly terminated, and avoid overloading adjacent slots with incompatible devices.

Whether you’re updating a residential panel, outfitting a small business distribution box, or maintaining a light industrial setup, the Siemens ED41B045L delivers dependable protection in a compact package. Available through AmpState, it’s a purpose-built solution when single-pole, 120V protection is the right fit for your system.