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ACP Electrical Fittings STB45125L - Safety Switch 125A 600V (NEMA 3R)

ACP Electrical Fittings
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ACP Electrical Fittings STB45125L is a heavy-duty industrial safety switch designed for reliable circuit protection and disconnection in commercial and industrial power distribution systems. This unit is rated for 600V AC maximum and carries a continuous current rating of 125 amps, providing robust overcurrent protection for branch circuits and equipment. The switch features a NEMA 3R rainproof enclosure constructed from galvanized steel, measuring approximately 12 inches in height, 8 inches in width, and 6 inches in depth, with a weight of 5.19 lb for secure mounting. It complies with UL 98 and CSA C22.2 No. 4 standards for enclosed switches, ensuring safe operation in demanding environments. Typical applications include motor disconnects, lighting control, and machinery isolation in manufacturing plants, commercial buildings, and agricultural facilities.

Key Features & Specifications
  • Type: Heavy-duty safety switch, NEMA 3R rainproof enclosure, galvanized steel construction
  • Voltage Rating: 600V AC
  • Current Rating: 125A
  • Dimensions: Approximately 12" H x 8" W x 6" D
  • Standards: UL 98, CSA C22.2 No. 4
  • Applications: Motor disconnects, lighting control, machinery isolation
  • Switch Type: Heavy-duty safety switch
  • Configuration: 2-pole, 3-wire
  • Enclosure: NEMA 3R
  • Mounting: Surface mount
  • Wire Size: #14 AWG to #2/0 AWG
  • Certification: UL listed, CSA certified
  • Installation Type: Industrial/commercial
  • Amperage: 125A
  • Voltage: 600V AC
  • Phase: Single phase
  • Poles: 2
  • Protection: Overcurrent
  • Functions: Disconnect, isolation
  • Frame Size: NEMA 1
  • Trip Type: Thermal-magnetic
  • Panel Type: Non-fusible
  • Breaker Type: Safety switch
  • Control Voltage Minimum: 120V AC
  • Control Voltage Maximum: 600V AC
  • MCM Size: Not applicable
  • Metal Type: Galvanized steel
  • Panel Style: Surface mount
  • Bus Type: Copper
  • Fuse Class: Not applicable (non-fusible)
  • Insulation Temperature: 105°C
  • Inductance: Not specified
  • Impedance: Not specified
  • Barrels: Not applicable
  • Class Rating: Not applicable
  • Diameter: Not applicable
  • Velocity: Not applicable
  • Clip Center: Not applicable
  • Clas: Not applicable
  • Hz: 50/60 Hz
  • Coil Material: Not applicable (manual switch)
  • Horse Power: 10 HP at 240V, 25 HP at 480V
  • Aux Contacts: Not included
  • CPT: Not included
  • Full Load Amps: 125A
  • Dist Voltage: 600V AC
  • Bucket Size: Not applicable
  • Bucket Style: Not applicable
  • Bucket Type: Not applicable
  • Full Load Amp Maximum: 125A
  • Full Load Amp Minimum: 0A
  • Relay Style: Not applicable
  • Coil Voltage Minimum: Not applicable
  • Wire: Copper/aluminum
  • Amperage Maximum: 125A
  • Amperage Minimum: 0A
  • Nema Rating: 3R
  • Switch Style: Heavy-duty
  • Wire Size: #14 AWG to #2/0 AWG
  • Circuit Breaker Mounting Style: Surface mount
  • Terminal Connection: Screw type
  • Frequency Rating: 50/60 Hz
  • Phase Connection: Single phase
  • Compatible Frames: NEMA 1
  • Installation Type: Surface mount
  • Item QTY: 1
  • Nema Starter Size: Not applicable
  • Breaker Frame: Not applicable
  • Current Rating: 125A
  • 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: 40°C
  • Max Clamp Voltage: Not applicable
  • On-State Current: Not applicable


Product Identification
  • UPC: 78138140372
  • GTIN: 00781381403726