Cutler-Hammer KD3300 3 Pole 300-Amp 240V K-Frame Circuit Breaker

The Cutler-Hammer KD3300 is a 300-amp, 3-pole, 240V KD Series K-Frame molded case circuit breaker built for heavy-duty industrial and commercial applications. K-Frame breakers handle high-current feeder and main circuit protection with robust thermal-magnetic trip technology. The KD3300 is compatible with Cutler-Hammer and Eaton K-Frame switchboards and is a direct replacement for legacy Westinghouse K-Frame breakers.

KD3300 Specifications

Specification	Value
Amperage	300A
Poles	3
Voltage	240VAC
Interrupt Rating	65kA @ 240V
Frame Size	K-Frame (300A Frame)
Mounting Type	Bolt-On
Trip Type	Thermal Magnetic
Trip Function	LI — Long-Time, Instantaneous
Wire Size	3/0–600 kcmil Cu/Al
Phase	3-Phase
Standards	UL 489, CSA C22.2 No.5, NEMA AB 1
Temperature Rating	40°C

Key Features

• K-Frame heavy-duty construction
• High interrupting capacity (65kA)
• Thermal-magnetic LI trip
• Visual trip indicator
• UL 489 listed, CSA certified

Applications

• Industrial main circuit protection
• Heavy feeder circuits
• Large motor branch circuits
• Utility service entrance protection

Buy KD3300 Circuit Breaker

Cutler-Hammer KD K-Frame 300A 3-pole circuit breaker. In stock at AllBreakerSales.com. Call (877) 611-0034 for same-day pricing. Genuine OEM parts, ships from US warehouse.

Brand: Cutler-Hammer | Series: KD K-Frame | Catalog Number: KD3300