Siemens | EH3A150 | Circuit Breaker | 150A | 3-Pole | 480V | Bolt-On

The Siemens EH3A150 circuit breaker delivers reliable protection for 480V, three-phase electrical systems with a 150A rating. Built for bolt-on installation, this 3-pole device is designed to drop into compatible Siemens panels and switchgear, making it a practical choice for maintenance, retrofit, or replacement projects that demand solid performance and easy field service.

Key specifications

• Amperage: 150 A
• Poles: 3-Pole (three-phase)
• Voltage rating: 480V
• Installation: Bolt-On termination
• Reference: Part number EH3A150

What makes this breaker stand out

The EH3A150 isn’t just a basic protective device. Its bolt-on design provides a secure, field-friendly mount that simplifies installation and future maintenance. The three-pole configuration ensures balanced protection across all conductors in a typical 480V three-phase system, making it ideal for feeders, motor circuits, and critical loads in industrial environments. Designed to align with Siemens panels and switchgear, this breaker minimizes compatibility guesswork when sourcing replacement parts.

Ideal use scenarios

• Retrofit projects where a 150A, 3-pole breaker is required in 480V systems
• Maintenance replacements to restore original protection levels without changing panel architecture
• New installations in commercial or industrial facilities that employ Siemens bolt-on breakers for reliability and serviceability

Practical guidance for installation and compatibility

To ensure a successful fit, always verify the breaker’s ratings and fit against your panel’s specifications. The part number EH3A150 should be the primary reference when confirming compatibility. When installing, follow standard electrical safety practices and manufacturer torque specs for bolt-on connections to ensure secure operation and fault current protection.