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Square D 5NR-251 - Fused Safety Switch 30A 250VAC

Square D
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Square D 5NR-251 is a 250-volt AC, 30-amp, 1-pole, 3-wire fused safety switch designed for industrial branch circuit protection and disconnection. This general-duty switch features a NEMA 1 enclosure with a visible blade construction for positive load break indication and is rated for 10,000 AIC at 250VAC. The unit complies with UL 98 and NEMA standards, providing reliable overcurrent protection for motor, lighting, and power distribution applications. It is commonly used in commercial and light industrial settings for isolating equipment and protecting feeder circuits.

Key Features & Specifications
  • Type: General-duty, fused safety switch with visible blade construction
  • Voltage Rating: 250 VAC
  • Current Rating: 30 Amps
  • Dimensions: Not specified
  • Standards: UL 98, NEMA
  • Applications: Motor, lighting, and power distribution branch circuit protection
  • Switch Type: Fused safety switch
  • Configuration: 1-pole, 3-wire
  • Coil Voltage Maximum: Not applicable
  • Temp Rating: Not specified
  • Shipping Dimensions: Not specified
  • Phase: 1-phase
  • Voltage: 250 VAC
  • Amperage: 30 Amps
  • AIC rating: 10,000 AIC at 250VAC
  • Connection: 3-wire
  • Poles: 1
  • Protection: Overcurrent
  • Functions: Disconnect and branch circuit protection
  • Frame Size: Not specified
  • Trip Type: Not applicable (fused)
  • Panel Type: NEMA 1
  • Breaker Type: Not applicable (fused switch)
  • Control Voltage Minimum: Not applicable
  • Control Voltage Maximum: Not applicable
  • MCM Size: Not specified
  • Metal Type: Steel enclosure
  • Panel Style: General-duty
  • 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 1
  • Relay Style: Not applicable
  • Coil Voltage Minimum: Not applicable
  • Wire: Not specified
  • Amperage Maximum: 30 Amps
  • Amperage Minimum: Not specified
  • Nema Rating: NEMA 1
  • Switch Style: Fused safety switch
  • Wire Size: Not specified
  • Certification: UL 98
  • Circuit Breaker Mounting Style: Not applicable
  • Terminal Connection: Not specified
  • Frequency Rating: 50/60 Hz
  • Phase Connection: 1-phase
  • Standards: UL 98, NEMA
  • Compatible Frames: Not specified
  • Installation Type: Surface mount
  • Item QTY: 1
  • Nema Starter Size: Not applicable
  • Breaker Frame: Not applicable
  • Current Rating: 30 Amps
  • Reverse Standoff Voltage: Not specified
  • Watts: Not specified
  • Peak Pulse Current: Not specified
  • Breakdown Voltage (MIN VBR@IT ) (V): Not specified
  • Breakdown Voltage (VBR@IT) (V): Not specified
  • Polarity: Not specified
  • Operating Temperature Maximum Celsius: Not specified
  • Max Clamp Voltage: Not specified
  • On-State Current: Not specified


Product Identification
  • UPC: 78590109928
  • GTIN: 00785901099284