The Square D MA36300 is a 300-amp, 3-pole, 600V M-Frame PowerPact molded case circuit breaker from Schneider Electric. It features a 65kAIC interrupting rating at 480V and thermal-magnetic trip protection. The MA series is designed for main and feeder circuit protection in commercial and industrial power distribution systems. It is compatible with Square D I-Line panelboards and NEMA-type switchboards.
| Specification | Value |
|---|---|
| Amperage | 300A |
| Poles | 3 |
| Voltage | 240/480/600VAC |
| Interrupt Rating | 100kA @ 240V · 65kA @ 480V · 25kA @ 600V |
| Frame Size | M-Frame (800A Frame) |
| Mounting Type | Bolt-On / I-Line Plug-In |
| Trip Type | Thermal Magnetic |
| Trip Function | LI — Long-Time, Instantaneous |
| Wire Size | 250–750 kcmil (Al/Cu) |
| Phase | 3-Phase |
| Standards | UL 489, CSA C22.2 No.5, NEMA AB 1 |
| Temperature Rating | -25°C to 70°C |
Square D MA M-Frame PowerPact 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: Square D | Series: MA M-Frame PowerPact | Catalog Number: MA36300
MA36200 | MA36250 | MA36300 - Square D MA M-Frame PowerPact | MA36350 | MA36400 - Square D PowerPact M-Frame