Square D FH360701121 70A 3-Pole 600 V Circuit Breaker Potential Transformer

The Square D FH360701121 is a rugged three‑pole circuit breaker designed to protect demanding 3‑phase power systems in industrial environments. With a 70 A current rating and a 600 V voltage limit, this device delivers reliable fault interruption to safeguard motors, transformers, and critical control electronics from short-circuit and overload conditions.

Ideal for applications where precise protection and integration with monitoring systems matter, the FH360701121 is built to work within Square D panel ecosystems and to support potential transformer (PT) based metering and relay interfaces. This makes it a practical choice for coordinated protection schemes that rely on accurate voltage sensing and timely trips across all three phases.

Key specifications

• Current rating: 70 A
• Poles: 3 (three‑phase protection)
• Voltage rating: 600 V
• Product family: Square D, model FH360701121
• Special feature: Potential transformer compatibility for metering and protection relays

Why this model stands out

• Specific three‑pole configuration ensures synchronized disconnection of all phases, enhancing system safety during faults
• 70 A rating accommodates substantial load profiles common in industrial lines while maintaining precise protection characteristics
• 600 V rating covers a wide range of commercial and light industrial distribution scenarios, providing versatile protection without over‑specifying hardware
• Potential transformer compatibility enables seamless integration with monitoring, metering, and protection relay networks for improved visibility and coordination
• Compact, reliable construction tailored for Square D panel installations, making replacements and upgrades straightforward for technicians

Ideal applications

• Three‑phase motor feeders in manufacturing equipment and assembly lines
• Protection for critical loads in distribution panels and switchgear assemblies
• Systems requiring PT‑based metering or relay interfacing for enhanced monitoring and fault awareness
• Industrial facilities, data centers, and commercial plants where dependable 3‑phase protection is essential

Practical use and tips

• Verify compatibility with your existing Square D panels and protection strategy to ensure optimal performance
• Leverage the potential transformer capability to enable accurate voltage sensing and relay coordination for improved fault isolation
• In installations with dense enclosures, plan for straightforward access to the FH360701121 for maintenance and inspections

Upgrade your protection strategy with the FH360701121 to deliver reliable 3‑phase interrupting capability, robust 70 A protection, and PT‑based monitoring support—all in a single, purpose‑built Square D solution.