Siemens | NGB1K045B | Circuit Breaker | 1-Pole

Siemens NGB1K045B is a 1-Pole circuit breaker designed for single‑phase protection in compatible Siemens panels. It serves as a practical solution for maintenance, retrofit projects, and reliable replacement when exact part matching is required to preserve system integrity.

Key details: Poles: 1-Pole. Before you order, confirm fit and ratings on your panel label; the part number NGB1K045B is the most accurate reference for compatibility.

Why this 1‑Pole breaker fits your job

• Precise compatibility with Siemens panels that accept NGB1K045B, ensuring proper fit and electrical clearance
• Simple, field-friendly replacement that minimizes downtime during service or upgrades
• Retrofit-friendly option for updating panel configurations while preserving protection for single‑phase circuits
• Clear identification and traceability — the NGB1K045B part number is your best reference to avoid mismatches

Ideal use cases

• Panel maintenance when a breaker wears or trips frequently
• Retrofits requiring exact Siemens 1-Pole specifications
• Replacement in systems where a precise component reference is necessary for ongoing compliance

How to verify compatibility and install

1. Check your panel's label for pole configuration and amp rating
2. Match the replacement part number: NGB1K045B
3. Confirm that the panel accepts Siemens 1-Pole breakers of this family and that the physical dimensions align with the enclosure

What you get with this purchase: a Siemens NGB1K045B 1‑Pole circuit breaker designed for reliable single‑phase protection in compatible panels, supported by Siemens’ engineering standards for compatibility with both legacy and retrofit installations.