Siemens | KM3B800 | Circuit Breaker | 3-Pole

Siemens KM3B800 is a 3-pole circuit breaker built for reliable protection in three-phase electrical systems. Identified by the part number KM3B800, this unit shines in maintenance, retrofit, and replacement projects where exact specifications matter. When you need a drop-in, compatible solution, KM3B800 is the reference you can trust.

• Three-pole design for three-phase protection: Supports common 3-phase configurations, providing coordinated protection across all phases.
• OEM Siemens reliability: As a Siemens component, it’s engineered to match the performance and electrical characteristics expected in Siemens panels and compatible systems.
• Clear compatibility reference: The KM3B800 part number is the best reference for determining fit with your equipment.
• Ideal for maintenance, retrofit, and replacement: A practical choice when you’re upgrading or restoring older installations that require exact specifications.
• Before you order: Confirm fit and ratings to ensure seamless integration with your panel and load requirements.

Use cases and scenarios

• Maintenance on three-pole distribution panels in manufacturing facilities
• Retrofit projects upgrading control gear in commercial buildings
• Replacement in existing Siemens or compatible systems where KM3B800 is specified
• Spare parts stocking for service teams to minimize downtime

What to check before purchasing

• Ensure the exact part number KM3B800 matches your specification needs
• Verify the 3-Pole configuration aligns with your panel’s feed
• Confirm voltage and current ratings match your installation requirements
• Check mounting style and terminal compatibility with your enclosure