Siemens ED43B040 40A 3P 480V Circuit Breaker, Bolt-On | AmpState

Built for everyday electrical work, the Siemens ED43B040 is a 40 A, three-pole circuit breaker designed to protect circuits in panelboards, load centers, and broader electrical distribution systems. The Bolt-On design ensures a secure, durable installation in compatible Siemens panels, delivering dependable 3‑phase protection where it matters most.

• 40 A, 3-Pole, 480V rating provides reliable protection for 3-phase commercial or industrial circuits up to 480V.
• Bolt-On mounting for quick, secure installation in suitable panelboards and distribution systems.
• Direct part-number match support reduces downtime and simplifies inventory management for maintenance teams and panel builders.
• Siemens reliability brings consistent trip characteristics and durable construction you can trust in everyday operations.
• Part number: ED43B040 — a precise fit for projects or replacements where exact compatibility matters.

Ideal for facilities striving for predictable protection of 3‑phase circuits, this breaker is a smart choice for maintenance crews, panel builders, and spare inventory where quick, exact replacements are essential. It’s especially valuable in environments with standardized Siemens equipment catalogs, where exact part numbers streamline procurement and reduces the risk of mismatches.

How this breaker solves real-world problems

• Protects 3‑phase loads at up to 480V, helping prevent outages from overcurrent conditions in industrial and commercial distributions.
• Bolt-on design speeds field servicing, minimizing downtime during replacements or upgrades.
• Exact ED43B040 part-number compatibility minimizes installation guesswork and ensures proper fit in compatible panels.

Practical tips for commissioning and maintenance

• Cross-check the exact ED43B040 part number with your panel catalog to confirm fit before ordering.
• Check panel labeling and ensure the installed breaker is within the panel’s supported bolt-on style and voltage rating.
• Maintain a small stock of Siemens ED43B040 for rapid replacements in facilities with 3‑phase distribution—reducing downtime when a fault occurs.
• If you’re unsure about compatibility, AmpState can assist with fit confirmation to prevent costly mismatches.

Available from AmpState, the Siemens ED43B040 delivers a dependable, precise solution for protecting 3‑phase circuits in industrial and commercial environments. If you need help matching a part number or confirming compatibility, send us a message and we’ll help verify the fit.