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Crouse-Hinds LL300MHDG - 300A Fusible Safety Switch, 600V AC

Crouse-Hinds
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Crouse-Hinds LL300MHDG is a heavy-duty, 300-amp fusible safety switch designed for reliable overcurrent protection and disconnection in industrial power distribution systems. It is rated for 600 volts AC and 300 amps continuous current, with a robust NEMA 4X stainless steel enclosure that resists corrosion in harsh environments. The switch features a visible blade design for positive load break confirmation and complies with UL 98 and CSA standards for safety and performance. This unit is typically used in commercial and industrial applications requiring high-ampacity switching, such as motor control centers, panelboards, and feeder disconnects.

Key Features & Specifications
  • Type: Fusible safety switch, heavy-duty, NEMA 4X stainless steel enclosure
  • Voltage Rating: 600 V AC
  • Current Rating: 300 A
  • Dimensions: Not specified
  • Standards: UL 98, CSA certified
  • Applications: Industrial power distribution, motor control, feeder disconnects
  • Switch Type: Fusible, visible blade
  • Configuration: 3-pole, 3-wire
  • Coil Voltage Maximum: Not applicable
  • Temp Rating: Not specified
  • Shipping Dimensions: Not specified
  • Phase: 3-phase
  • Voltage: 600 V AC
  • Amperage: 300 A
  • AIC rating: Not specified
  • Connection: Not specified
  • Poles: 3
  • Protection: Overcurrent
  • Functions: Disconnect, overcurrent protection
  • Frame Size: Not specified
  • Trip Type: Not applicable (fusible)
  • Panel Type: Not specified
  • Breaker Type: Not applicable (switch)
  • Control Voltage Minimum: Not applicable
  • Control Voltage Maximum: Not applicable
  • MCM Size: Not specified
  • Metal Type: Stainless steel
  • Panel Style: Not specified
  • Bus Type: Not specified
  • Fuse Class: Not specified
  • Insulation Temperature: Not specified
  • Inductance: Not specified
  • Impedance: Not specified
  • Barrels: Not specified
  • Class Rating: Not specified
  • Diameter: Not specified
  • Velocity: Not specified
  • Clip Center: Not specified
  • Clas: Not specified
  • Mounting: Surface mount
  • Hz: 50/60 Hz
  • Coil Material: Not applicable
  • Horse Power: Not specified
  • Aux Contacts: Not specified
  • CPT: Not specified
  • Full Load Amps: Not specified
  • Dist Voltage: Not specified
  • Bucket Size: Not specified
  • Bucket Style: Not specified
  • Bucket Type: Not specified
  • Full Load Amp Maximum: Not specified
  • Full Load Amp Minimum: Not specified
  • Enclosure: NEMA 4X stainless steel
  • Relay Style: Not applicable
  • Coil Voltage Minimum: Not applicable
  • Wire: Not specified
  • Amperage Maximum: 300 A
  • Amperage Minimum: Not specified
  • Nema Rating: NEMA 4X
  • Switch Style: Heavy-duty, visible blade
  • Wire Size: Not specified
  • Certification: UL 98, CSA
  • Circuit Breaker Mounting Style: Not applicable
  • Terminal Connection: Not specified
  • Frequency Rating: 50/60 Hz
  • Phase Connection: 3-phase
  • Standards: UL 98, CSA
  • Compatible Frames: Not specified
  • Installation Type: Surface mount
  • Item QTY: 1
  • Nema Starter Size: Not applicable
  • Breaker Frame: Not applicable
  • Current Rating: 300 A
  • Reverse Standoff Voltage: Not applicable
  • Watts: Not specified
  • Peak Pulse Current: Not applicable
  • Breakdown Voltage (MIN VBR@IT ) (V): Not applicable
  • Breakdown Voltage (VBR@IT) (V): Not applicable
  • Polarity: Not applicable
  • Operating Temperature Maximum Celsius: Not specified
  • Max Clamp Voltage: Not applicable
  • On-State Current: Not applicable


Product Identification
  • UPC: 66227705926
  • GTIN: 00662277059268