The Siemens LD63F300 is a 300-amp, 3-pole, 600V L-Frame molded case circuit breaker designed for heavy-duty feeder and main circuit protection in industrial and commercial applications. With a 65kAIC interrupting rating at 480V and thermal-magnetic LI trip technology, the LD63F300 delivers reliable protection for demanding electrical environments. It is a direct replacement for legacy ITE LD63F300 units.
| Specification | Value |
|---|---|
| Amperage | 300A |
| Poles | 3 |
| Voltage | 600VAC |
| Interrupt Rating | 100kA @ 240V · 65kA @ 480V · 35kA @ 600V |
| Frame Size | L-Frame (400A Frame) |
| Mounting Type | Bolt-On |
| Trip Type | Thermal Magnetic |
| Trip Function | LI — Long-Time, Instantaneous |
| Wire Size | 3/0–600 kcmil (Al/Cu) |
| Phase | 3-Phase |
| Standards | UL 489, CSA C22.2 No.5, NEMA AB 1 |
| Temperature Rating | -25°C to 70°C |
Replaces: ITE LD63F300
Siemens LD L-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: Siemens | Series: LD L-Frame | Catalog Number: LD63F300
LD63F100 - Siemens LD L-Frame | LD63F125 - Siemens LD L-Frame | LD63F150 - Siemens LD L-Frame | LD63F175 - Siemens LD L-Frame | LD63F200 - Siemens LD L-Frame