The Square D MJA36350 is a 350-amp, 3-pole, 600V PowerPact M-Frame molded case circuit breaker with an ET 1.0 solid-state electronic trip unit. Designed for heavy-duty feeder and main circuit protection in commercial and industrial applications, it features I-Line plug-in mounting on the line side and mechanical lug terminals on the load side. The electronic trip provides LI (Long-Time, Instantaneous) protection with an 80% continuous current rating. With an interrupting rating of 100kA at 240V and 65kA at 480V, it handles demanding power distribution environments. UL Listed, CSA Approved, CE marked, and NOM certified.
| Specification | Value |
|---|---|
| Amperage | 350A |
| Poles | 3 |
| Voltage | 240/480/600VAC |
| Interrupt Rating | 100kA @ 240V · 65kA @ 480V · 25kA @ 600V |
| Frame Size | M-Frame (800A Frame) |
| Mounting Type | I-Line Plug-In (line) / Mechanical Lugs (load) |
| Trip Type | Electronic — ET 1.0 Solid State |
| Trip Function | LI — Long-Time, Instantaneous |
| Wire Size | 3/0 AWG–500 kcmil (Al/Cu) |
| Phase | 3-Phase |
| Standards | UL 489, CSA C22.2 No.5, IEC 60947-2, NOM, CE |
| Temperature Rating | 40°C |
Replaces: NJA36350
Square D PowerPact M-Frame 350A 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: PowerPact M-Frame | Catalog Number: MJA36350
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