Gould JJ3-B - 400A, 600VAC / 250VDC, Circuit Breaker

Introducing the Gould JJ3-B—an industrial‑grade circuit breaker engineered for dependable overcurrent protection in demanding electrical environments.

With a robust 400A current rating and a versatile voltage window of up to 600VAC / 250VDC, this unit is built to safeguard power distribution and motor control systems without compromising performance.

Key specifications:

• Current rating: 400A
• Voltage rating: up to 600VAC / 250VDC
• Breaker type: Circuit Breaker

Where it shines

• Panelboards and switchboards: provides fast, predictable interruption during faults to protect wiring and downstream equipment.
• Control panels and OEM equipment: compact, reliable protection for custom machinery and integrated systems.
• Industrial and commercial environments: designed for reliable operation in distribution panels and motor control centers where uptime matters.

Why choose the JJ3-B

Its combination of 400A capacity and dual‑voltage compatibility (600VAC / 250VDC) covers both traditional AC power and DC-linked applications often found in modern automation and control systems. Built for reliability in demanding environments, it helps ensure safe operation and straightforward integration in your power distribution architecture.

Practical scenarios

• Factory line protection: safeguards feeders feeding motors and drives, helping maintain production continuity in fault conditions.
• OEM equipment integration: a single protective device that pairs with standard control panels and assemblies.
• Distribution and control upgrades: supports robust overcurrent protection in new or retrofitted panels and MCCs.

In short, the Gould JJ3-B 400A circuit breaker is a purpose-built solution for engineers and technicians who demand reliable protection and straightforward integration in distribution panels, motor control centers, and OEM assemblies.