Square D | 994370 | Circuit Breaker | 70A | 3-Pole | 480V | Bolt-On

The Square D 994370 circuit breaker is a purpose-built solution for industrial panels needing reliable three-phase protection. With a 70 A rating, three poles, and a 480 V operating specification, this bolt-on breaker is designed for maintenance, retrofit, and replacement projects where exact compatibility matters. Key specifications at a glance - Amperage: 70 A - Poles: 3-Pole - Voltage: 480 V - Mounting: Bolt-On - Reference number: 994370 (best compatibility reference) Why this bolt-on breaker stands out in demanding electrical environments - Secure, vibration-resistant mounting: The bolt-on design provides a robust attachment that stays aligned in equipment with continuous operation or heavy 3-phase loads, reducing the risk of loose connections over time. - Precise three-phase protection: The 3-pole configuration ensures synchronized interruption across all phases, safeguarding motors, drives, and other three-phase equipment from unequal loading and fault conditions. - Industrial-ready voltage rating: Built for 480 V systems, this breaker aligns with common commercial and manufacturing power distribution so you can upgrade or retrofit without over-specifying equipment. - Clear compatibility reference: The part number 994370 is the most reliable way to verify fit with your Square D/Reliant panels and accessories. Always confirm the exact panel model and rating before ordering to ensure a smooth replacement. Ideal use cases - Panel retrofits: Upgrade aging protection in existing 480 V, three-phase distributions where a bolt-on breaker is required for secure mounting. - Maintenance replacements: Stock and swap in 70 A, 3-pole breakers to minimize downtime when a circuit trips or a part reaches end-of-life. - Equipment modernization: Bring older drive systems or line-start motors up to current protection standards with a compatible Square D bolt-on solution. How this protection device helps you manage risk and reliability - Predictable tripping behavior across three phases reduces the chance of unbalanced loads causing equipment damage. - Consistent performance in industrial environments where panel space is constrained and vibration is a factor, thanks to a rugged bolt-on mounting approach. - Streamlined ordering and maintenance planning: use the 994370 as the single reference point for compatibility checks, reducing guesswork during replacements. Practical tips for use and installation - Always verify fit and ratings before ordering by cross-referencing the panel model and the 994370 part number. - When replacing a breaker, ensure the replacement matches not only amperage and voltage but also the panel’s mounting footprint and frame type. - Schedule periodic inspections of bolt-on connections in high-vibration environments to maintain reliable electrical continuity. This 70 A, 3-pole, 480 V bolt-on circuit breaker from Square D is purpose-built for industrial distributors, manufacturing floors, and service teams needing a precise, durable replacement that aligns with existing 480 V three-phase systems.