Siemens ED41B040 - 40 A, 120 V, 1-Pole Bolt-On Circuit Breaker | AmpState

Introducing the Siemens ED41B040 - a 40A, 120V, 1-pole bolt-on molded case circuit breaker designed to deliver dependable branch circuit overcurrent and short-circuit protection inside panelboards and loadcenters. Built for real-world electrical systems, it provides a solid, maintenance-friendly solution for homes, small businesses, and light industrial setups.

Key benefits

• Secure bolt-on mounting ensures a rigid, vibration-resistant bus connection, minimizing loosening risks in active service environments.
• Thermal-magnetic trip unit delivers stable, repeatable protection by combining thermal overload sensing with instantaneous magnetic trip for short circuits.
• OEM-compatible works with matching Siemens loadcenters and panelboards for straightforward upgrades, replacements, or panel modernization.
• Robust molded-case construction designed to withstand everyday electrical loads and environmental challenges in residential, commercial, and light industrial applications.
• 1-pole, 40A, 120V configuration is ideal for protecting individual branch circuits such as lighting, receptacle circuits, or small equipment feeders.

Technical snapshot

• Manufacturer: Siemens
• Part Number: ED41B040
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 40A
• Voltage Rating: 120V
• Number of Poles: 1
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use cases

Use this ED41B040 breaker when you need reliable protection in residential service panels, small commercial setups, or light industrial distribution boards. It’s particularly well-suited for protecting individual lighting circuits, outlets, or dedicated loads where a compact, easy-to-install solution is key.

Why choose this Siemens breaker

What sets the ED41B040 apart is its combination of a secure bolt-on mount and a thermal-magnetic trip that stays consistent under varying load conditions. The bolt-on design minimizes vibration-related connection issues, while the trip unit provides dependable response to both overloads and short circuits. When paired with matching Siemens OEM panels, you get a cohesive, streamlined replacement or expansion path that preserves panel rating integrity and simplifies maintenance.

Whether you’re upgrading an existing panel or outfitting a new installation, the Siemens ED41B040 delivers clear, practical advantages: precise protection, solid installation, and seamless compatibility within the Siemens ecosystem. Add it to your panel today for a proven, field-ready solution that protects what you power.