ge CDK3300 300A 3-Pole 240 V Circuit Breaker

GE’s CDK3300 300A 3-Pole 240 V Circuit Breaker is engineered for demanding three‑phase power systems in busy commercial and industrial environments. With a 300 A current rating and a true 3‑pole design, this GE component delivers reliable overcurrent protection while ensuring all phases trip together for safer, more predictable fault response.

Key specifications

• Current rating: 300 A
• Poles: 3
• Voltage rating: 240 V
• Part number: CDK3300

Why the CDK3300 matters

In three‑phase systems, a single‑phase protection can leave others exposed to imbalance and equipment stress. The CDK3300’s 3‑pole design ensures all phases disconnect in unison during a fault, reducing the risk of collateral damage to motors, drives, and feeders. Built to integrate smoothly with GE panels and the CDK product family, it offers consistent protection characteristics and straightforward sourcing for maintenance or replacements.

Ideal applications

• Three‑phase feeders powering large motors, pumps, and compressors
• Main disconnects in mid‑size commercial or light industrial distribution panels
• Power distribution for data centers, labs, and critical loads with stringent uptime requirements
• Protection for HVAC systems, industrial automation equipment, and process lines

Installation and compatibility

Ensure you’re working with a GE‑compatible panel or distribution setup to maximize reliability and fit. Correct electrical labeling, proper lug termination, and adherence to local electrical codes are essential. When installing, verify that conductor sizes, torque specs, and clearance meet GE installation guidelines and panel manufacturer requirements.

Practical tips for optimized protection

• Coordinate protection settings with upstream devices to maintain selectivity and minimize unnecessary outages
• Keep a matching CDK3300 spare on hand for rapid service to minimize downtime
• Periodically inspect for signs of overheating or wear in the enclosure and replace if evidence of damage appears
• Document usage scenarios and load profiles to confirm the 300 A rating remains aligned with evolving power needs