Siemens ED21B020 - 20 A, 120 V, 1-Pole Bolt-On Circuit Breaker | AmpState

Siemens ED21B020 is a 20A, 120V, 1-pole bolt-on molded case circuit breaker designed to protect branch circuits in panelboards and load centers with steadfast reliability. Built for residential, commercial, and light industrial applications, this breaker delivers consistent performance where it matters most—in the heart of your electrical distribution system.

Key features

• Secure bolt-on mounting for a rigid, vibration-resistant bus connection that stays put through demanding conditions.
• Thermal-magnetic trip unit for stable, repeatable protection across a range of temperatures and load conditions.
• Compatible with matching OEM load centers and panelboards, ensuring straightforward integration into your existing setup.
• Suitable for residential, commercial, and light industrial applications requiring reliable branch circuit overcurrent and short-circuit protection.

Technical specifications

• Manufacturer: Siemens
• Part Number: ED21B020
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 20A
• Voltage Rating: 120V
• Number of Poles: 1
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Why this matters

The ED21B020 combines a robust bolt-on design with a responsive thermal-magnetic trip system, delivering dependable protection for critical circuits. The bolt-on mounting creates a secure, vibration-resistant connection to the bus, reducing the risk of intermittent contacts in environments with movement or vibration. The thermal-magnetic protection reacts quickly to overcurrent or short-circuit events, helping to minimize damage to wiring and connected devices while keeping other circuits safe.

Ideal use scenarios

• Replacing a failed breaker in existing Siemens or OEM panelboards and load centers that require a 20A, 1-pole bolt-on solution.
• Adding or upgrading 20A circuits for lighting, receptacles, or small-appliance loads in residential spaces.
• Installing in commercial or light industrial panels where stable, long-term overcurrent protection is essential.

With Siemens ED21B020, you’re choosing a purpose-built solution for reliable branch circuit protection that fits seamlessly into compatible panelboards and load centers. It’s a practical, durable choice for keeping electrical systems safe and functioning smoothly across a range of environments.