Siemens | ED21B030 | Circuit Breaker | 1-Pole | 120V | Bolt-On

Siemens ED21B030 Circuit Breaker is a 1‑pole, 120V bolt‑on unit designed for maintenance, retrofit, and replacement tasks where exact specifications matter. Dialed in for Siemens panels that require a bolt‑on mounting style, this breaker helps you restore circuit protection quickly and reliably.

Key specifications

• Poles: 1‑Pole
• Voltage: 120V
• Mounting: Bolt‑On
• Part number: ED21B030

Compatibility and fit: The ED21B030 is the best reference for compatibility. Always confirm fit and ratings with your panel labeling or service manual before ordering. This ensures the breaker you choose matches the panel’s bus, trip characteristics, and mounting pattern.

What this breaker helps you accomplish

Whether you are performing a routine panel maintenance, upgrading an aging electrical system, or replacing a failed breaker, the ED21B030 delivers dependable circuit protection in a compact, bolt‑on package. It is particularly suited for installations where the panel manufacturer specifies bolt‑on Siemens breakers and where a straightforward replacement avoids adapters or reconfigurations.

Use cases and ideal scenarios

• Residential electrical panels requiring a 1‑pole, 120V bolt‑on Siemens breaker for a dedicated circuit such as lighting or outlets.
• Retrofit projects where matching the original part number ED21B030 minimizes compatibility questions.
• Maintenance and field service tasks in facilities with Siemens bolt‑on breaker systems that need a reliable, ready‑to‑install replacement.

Installation and safety tips

• Power down the main service and confirm zero voltage before handling any panel components.
• Remove the old breaker, verify the bus connection and mounting pattern align with bolt‑on hardware for the 1‑pole configuration.
• Insert the new ED21B030, seat fully, and secure mounting screws as per panel manufacturer guidelines.
• Verify proper operation after installation and test the connected circuit according to local electrical codes.

Why choose Siemens for this role

Siemens brings a long‑standing reputation for reliable protection devices. The ED21B030 offers a factory‑aligned fit for compatible panels, minimizing troubleshooting and ensuring the correct trip characteristics for your 120V circuits. When you need a straightforward, dependable replacement without modification, this bolt‑on 1‑pole breaker mirrors the original design and performance you expect from Siemens.