Siemens HEB3B040B 40A 3P 600V Circuit Breaker, Bolt-On | AmpState

Introducing the Siemens HEB3B040B, a robust 40 A, 3-pole, 600 V bolt-on circuit breaker designed for reliable protection in panelboards, load centers, and electrical distribution systems.

Whether you're upgrading an existing installation, performing a retrofit, or planning maintenance with strict part-number continuity, this unit keeps your service records clean and downtime minimal. The bolt-on mounting offers secure, vibration-resistant attachment in demanding electrical environments.

Key specifications and benefits

• Amperage: 40 A — ideal for protecting feeders and branch circuits in three-phase systems.
• Poles: 3 — supports three-phase protection in a compact form factor.
• Voltage rating: 600 V — suitable for industrial and commercial distribution networks.
• Mounting: Bolt-On — provides secure installation and straightforward replacement during maintenance.
• Part number: HEB3B040B — ensures compatibility in Siemens panels and when swapping like-for-like replacements.

Use cases and practical scenarios:

• Retrofit projects where keeping the same part number simplifies procurement, documentation, and compliance.
• Maintenance planning in busy electrical rooms where rapid replacement minimizes downtime.
• Protection of three-phase feeders in panelboards and load centers used in light industrial settings.

Why this matters:

• A three-pole, 40 A breaker with a 600 V rating provides balanced protection for three-phase circuits, reducing the risk of overcurrent and electrical faults spreading across phases.
• The bolt-on design is easier to secure in standard Siemens-compatible panels, facilitating faster service calls and inventory management.
• Part-number consistency (HEB3B040B) simplifies documentation, ordering, and cross-reference within maintenance programs.

Availability and support:

Available from AmpState. If you need help matching a part number or confirming compatibility with your specific Siemens panelboard or load center, simply message us and we’ll help you confirm fit.