EH3B150 - 150Amp Circuit Breaker

EH3B150 - 150 Amp Circuit Breaker

When you’re replacing a breaker in an existing system, the last thing you want is guesswork. The EH3B150 molded case circuit breaker is built to match EH3 frame setups, making it a straightforward option when you need something that fits right and works the way your system expects.

This 150-amp, 3-pole breaker is commonly used in commercial and industrial panels where maintaining the original configuration matters. Instead of reworking your setup, this unit helps you stay aligned with the existing design—saving time during installation and avoiding unnecessary changes.

It’s rated at 14kA at 480VAC and 18kA at 240VAC, which covers a wide range of typical applications. And with a standard 40°C operating rating, it’s suited for everyday conditions found in electrical rooms, utility spaces, and facility environments.

At the end of the day, this is about keeping your system running as intended—with a breaker that fits, functions, and holds up over time.

Key Features and Benefits

• Designed to match EH3 frame circuit breaker configurations
• 150-amp capacity for consistent load handling
• 3-pole breaker for three-phase electrical systems
• Interrupting ratings:
  • 14kA @ 480VAC
  • 18kA @ 240VAC
• Molded case design built for long-term use
• Rated for standard 40°C operating environments
• Helps reduce installation issues by maintaining original fit and layout

Technical Specifications

• Part Number: EH3B150
• Amperage: 150A
• Poles: 3
• Frame Type: EH3
• Interrupting Capacity:
  • 14kA at 480VAC
  • 18kA at 240VAC
• Temperature Rating: 40°C
• Breaker Type: Molded Case Circuit Breaker
• Dimensions: Approx. 6.0” height
• Weight: 4.5 lbs

Material Compliance and Certifications

• Meets commonly accepted industry standards for molded case circuit breakers
• Designed for systems requiring specific interrupting ratings and voltage classifications
• Suitable for installations following standard electrical compliance practices

Where It Works Best

• Commercial and industrial electrical panels using EH3 frame breakers
• Maintenance and replacement projects where exact compatibility is important
• Facilities like manufacturing plants, warehouses, and large buildings
• Electrical systems where minimizing downtime is a priority