JB21500SMW | Circuit Breaker | 150A | 3-Pole | 240V

The JB21500SMW is a rugged industrial circuit breaker designed to deliver reliable 3‑phase protection for demanding electrical systems. Built for maintenance, retrofit, and replacement projects, it provides a precise 150A rating in a 3‑pole configuration on a 240V network, making it a ready-made upgrade or component for existing panels that require this exact specification.

Key specifications at a glance

• Amperage: 150A
• Poles: 3‑Pole
• Voltage: 240V
• Application: Industrial power distribution, three‑phase protection, retrofit and replacement projects

What sets the JB21500SMW apart

This part is defined by its exact compatibility footprint. The JB21500SMW is the most reliable reference for matching your panel and feeder specifications, reducing guesswork during replacement. Its 3‑pole design is tailored for three‑phase systems, ensuring balanced protection across all phases and safeguarding motors, drives, and other heavy loads from overcurrent events in industrial environments.

Why professionals choose it

• Precision compatibility: The part number JB21500SMW serves as the key indicator for ensuring the correct mounting, bus connections, and electrical characteristics in compatible equipment.
• Focused performance: With a 150A rating, it’s well-suited for mid‑to‑large feeders and motor circuits that require solid overcurrent protection without oversizing the protective device.
• Practical retrofit option: When upgrading older systems or replacing worn components, this breaker provides a straightforward path to restore reliability while aligning with existing 240V, three‑phase infrastructure.

Ideal use scenarios

• Retrofits in legacy switchboards or motor control centers that previously relied on less capable or mismatched protective devices.
• New installations where a dedicated 3‑pole, 240V breaker is required to protect three‑phase feeders feeding large machines, conveyors, or HVAC equipment.
• Replacement of failed breakers in industrial settings where panels, wiring, and safety standards are built around a 150A, 3‑pole protection scheme.

Installation and compatibility considerations

• Verify fit and ratings before ordering: The notes specify confirming fit and ratings to ensure compatibility with your panel, bus layout, and rated voltage.
• Reference the part number for cross‑checking: The JB21500SMW is the most reliable reference when matching against OEM manuals or panel specifications.
• System alignment: Ensure your electrical system is configured for 240V and uses a three‑pole breaker for proper three‑phase protection.
• Wiring and safety considerations: Confirm conductor sizes and protection requirements align with the 150A rating, and follow standard installation practices for industrial breakers to maintain compliance and safety.
• Documentation and standards: Adhere to local electrical codes and the equipment manufacturer’s instructions during installation and commissioning.

For professionals who demand dependable, purpose-built protection in 240V three‑phase networks, the JB21500SMW delivers a precise, compatible solution for maintenance, retrofit, and replacement projects. Its clear compatibility reference and focused amperage/voltage specification help you avoid unnecessary substitutions and keep critical equipment safe. Add this 150A, 3‑pole breaker to your order to ensure consistent protection across your industrial electrical system.