Square D KI361101021 110A 3-Pole 600 V Circuit Breaker

Square D KI361101021 110A 3-Pole 600 V Circuit Breaker is a genuine Square D protection device engineered to safeguard 3‑phase electrical systems. With a 110 amp rating and a 600‑volt maximum, this breaker provides reliable overcurrent protection for demanding commercial and light industrial applications.

Key specifications

• Current rating: 110 A
• Poles: 3 (3-pole design for true 3-phase protection)
• Voltage rating: 600 V
• Part number: KI361101021
• Brand: Square D

Why this breaker stands out

Built by Square D to integrate seamlessly with Square D panelboards and enclosures, this breaker delivers consistent performance for 3-phase feeders. The 110 A rating makes it well-suited for protecting feeders to motors, pumps, compressors, and other equipment in systems up to 600 V. By selecting a 3-pole breaker tailored to your 3-phase setup, you can reduce nuisance trips while ensuring fast disconnection when faults occur, helping minimize downtime and protect wiring and equipment.

Ideal use cases

• Replacement in existing Square D panelboards or enclosures requiring a 110 A, 3-pole 600 V breaker
• New installations needing 3-phase protection for machinery, HVAC units, or manufacturing lines within a 600 V system
• Maintenance and upgrade projects in commercial facilities and light industrial environments

Practical tips

• Verify panel compatibility: ensure your panel accepts Square D 3-pole breakers with a 600 V rating
• Check line and load connections for proper torque to maintain reliable contact and prevent overheating
• Keep the part number KI361101021 handy for ordering replacements and documenting panel configurations