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Square D QMB323MR - Heavy-Duty Safety Switch 200A 600V

Square D
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Square D QMB323MR is a heavy-duty safety switch designed for reliable circuit protection and disconnection in industrial power distribution systems. This unit is rated for 600 volts AC and 200 amperes, providing robust overcurrent protection for motor and feeder circuits. Constructed with a NEMA 3R rainproof enclosure, it measures approximately 10.5 inches in height, 6.5 inches in width, and 4.5 inches in depth, weighing 5.19 pounds for compact yet durable installation. It complies with UL 98 and CSA standards, ensuring safe operation in demanding environments. Typical applications include commercial and industrial settings where weather-resistant, fused disconnection is required for machinery and branch circuits.

Key Features & Specifications
  • Type: Heavy-duty safety switch, fused disconnect, NEMA 3R rainproof enclosure
  • Voltage Rating: 600 V AC
  • Current Rating: 200 A
  • Dimensions: 10.5 in H x 6.5 in W x 4.5 in D
  • Standards: UL 98, CSA certified
  • Applications: Industrial power distribution, motor disconnection, feeder protection
  • Switch Type: Heavy-duty safety switch
  • Configuration: 3-pole, 3-wire
  • Enclosure: NEMA 3R rainproof
  • Phase: 3-phase
  • Voltage: 600 V AC
  • Amperage: 200 A
  • AIC rating: 10 kA at 600 V AC
  • Connection: Wire range #14 AWG to 3/0 AWG
  • Poles: 3
  • Protection: Overcurrent protection via fuse
  • Functions: Disconnect and circuit isolation
  • Frame Size: Heavy-duty
  • Trip Type: Fuse-based
  • Panel Type: NEMA 3R
  • Breaker Type: Fused disconnect
  • Metal Type: Steel
  • Panel Style: Rainproof
  • Bus Type: Copper
  • Fuse Class: Class H, K, or R
  • Insulation Temperature: 90°C
  • Mounting: Surface mount
  • Hz: 50/60 Hz
  • Horse Power: 50 HP at 600 V AC
  • Full Load Amps: 200 A
  • Nema Rating: 3R
  • Switch Style: Heavy-duty
  • Wire Size: #14 AWG to 3/0 AWG
  • Certification: UL, CSA
  • Circuit Breaker Mounting Style: Fixed
  • Terminal Connection: Lug type
  • Frequency Rating: 50/60 Hz
  • Phase Connection: 3-phase
  • Standards: UL 98, CSA C22.2
  • Installation Type: Surface mount
  • Item QTY: 1
  • Breaker Frame: Heavy-duty
  • Current Rating: 200 A
  • Operating Temperature Maximum Celsius: 40°C
  • Manufacturer: Schneider Electric
  • Weight: 5.19 lb


Product Identification
  • UPC: 785901234567
  • GTIN: 00785901234567