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Thomas & Betts 3905BU - Safety Switch 200A 600V (NEMA 4X)

Thomas & Betts
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Thomas & Betts 3905BU is a heavy-duty industrial safety switch designed for reliable circuit disconnection and equipment protection. It is rated for 600V AC and 200A continuous current, featuring a NEMA 4X stainless steel enclosure for corrosion resistance in harsh environments. The switch utilizes a visible blade, quick-make/quick-break mechanism with a red handle and is UL 98 listed for service entrance applications. This unit is commonly employed in commercial and industrial settings for motor control, feeder disconnects, and branch circuit protection.

Key Features & Specifications
  • Type: Heavy-duty safety switch, NEMA 4X stainless steel enclosure
  • Voltage Rating: 600V AC
  • Current Rating: 200A
  • Dimensions: Not specified
  • Standards: UL 98, NEMA 4X
  • Applications: Motor control, feeder disconnects, branch circuit protection
  • Switch Type: Visible blade, quick-make/quick-break
  • Configuration: 3-pole, 3-wire
  • Coil Voltage Maximum: Not applicable
  • Temp Rating: Not specified
  • Shipping Dimensions: Not specified
  • Phase: 3-phase
  • Voltage: 600V
  • Amperage: 200A
  • AIC rating: Not specified
  • Connection: Not specified
  • Poles: 3
  • Protection: Overcurrent
  • Functions: Disconnect, isolation
  • Frame Size: Not specified
  • Trip Type: Not applicable
  • Panel Type: Not specified
  • Breaker Type: Not applicable
  • 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
  • Hz: 50/60
  • 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: 200A
  • Amperage Minimum: Not specified
  • Nema Rating: 4X
  • Switch Style: Heavy-duty
  • Wire Size: Not specified
  • Certification: UL 98
  • Circuit Breaker Mounting Style: Not applicable
  • Terminal Connection: Not specified
  • Frequency Rating: 50/60 Hz
  • Phase Connection: 3-phase
  • Standards: UL 98
  • Compatible Frames: Not specified
  • Installation Type: Surface
  • Item QTY: 1
  • Nema Starter Size: Not applicable
  • Breaker Frame: Not applicable
  • Current Rating: 200A
  • 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: 078621080580
  • GTIN: 00786210039053