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S203U-K1.6 - Miniature Circuit Breaker 1.6A 3-Pole

United Fuses
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S203U-K1.6 is a miniature circuit breaker designed for overcurrent protection in industrial control panels. It is rated for 480Y/277V AC with a current rating of 1.6 amps, featuring a 3-pole configuration and a K-type trip curve for motor and transformer protection. The unit weighs 5.19 lb and is constructed with a compact frame for DIN rail mounting, ensuring reliable operation in demanding environments. It complies with UL 489 and CSA standards, making it suitable for branch circuit protection. Typical applications include motor control centers, panelboards, and industrial machinery requiring precise overcurrent protection.

Key Features & Specifications
  • Type: Miniature Circuit Breaker
  • Voltage Rating: 480Y/277V AC
  • Current Rating: 1.6 A
  • Dimensions: Not specified
  • Standards: UL 489, CSA
  • Applications: Industrial control panels, motor protection
  • Switch Type: Toggle
  • Configuration: 3-pole
  • Coil Voltage Maximum: Not applicable
  • Temp Rating: Not specified
  • Shipping Dimensions: Not specified
  • Phase: 3-phase
  • Voltage: 480Y/277V AC
  • Amperage: 1.6 A
  • AIC rating: Not specified
  • Connection: Line/Load
  • Poles: 3
  • Protection: Overcurrent
  • Functions: Overload, short-circuit
  • Frame Size: Compact
  • Trip Type: K-curve
  • Panel Type: Not specified
  • Breaker Type: Miniature
  • Control Voltage Minimum: Not applicable
  • Control Voltage Maximum: Not applicable
  • MCM Size: Not applicable
  • Metal Type: Not specified
  • Panel Style: Not specified
  • Bus Type: Not specified
  • Fuse Class: Not applicable
  • Insulation Temperature: Not specified
  • Inductance: Not applicable
  • Impedance: Not applicable
  • Barrels: Not applicable
  • Class Rating: Not specified
  • Diameter: Not applicable
  • Velocity: Not applicable
  • Clip Center: Not applicable
  • Clas: Not specified
  • Mounting: DIN rail
  • 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 applicable
  • Bucket Style: Not applicable
  • Bucket Type: Not applicable
  • Full Load Amp Maximum: Not specified
  • Full Load Amp Minimum: Not specified
  • Enclosure: Not specified
  • Relay Style: Not applicable
  • Coil Voltage Minimum: Not applicable
  • Wire: Not specified
  • Amperage Maximum: 1.6 A
  • Amperage Minimum: Not specified
  • Nema Rating: Not specified
  • Switch Style: Toggle
  • Wire Size: Not specified
  • Certification: UL, CSA
  • Circuit Breaker Mounting Style: DIN rail
  • Terminal Connection: Screw
  • Frequency Rating: 50/60 Hz
  • Phase Connection: 3-phase
  • Standards: UL 489, CSA C22.2
  • Compatible Frames: Not specified
  • Installation Type: Fixed
  • Item QTY: 1
  • Nema Starter Size: Not applicable
  • Breaker Frame: S200
  • Current Rating: 1.6 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
  • Weight: 5.19 lb