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Westinghouse 1221C21G03 - Shunt Trip 120VAC (SPB Series)

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Westinghouse 1221C21G03 is a shunt trip accessory designed for remote tripping of SPB series circuit breakers to enhance safety and control in power distribution systems. It operates at a control voltage of 120VAC, providing reliable interruption of electrical circuits when triggered. This unit weighs 1 lb and supports behind-the-door and fixed mounting styles, with compatibility for SPB50, SPB65, and SPB100 frames. It meets industry standards for shunt trip accessories, ensuring dependable performance in industrial environments. Typical applications include remote shutdown and emergency disconnect in power distribution setups.

Key Features & Specifications
  • Type: Shunt Trip
  • Family: SPB Series
  • Control Voltage: 120VAC
  • Control Voltage Minimum: 120
  • Control Voltage Maximum: 120
  • Compatible Frames: SPB50, SPB65, SPB100
  • Weight: 1 lb
  • Mounting Type: Behind-the-door and fixed
  • Amperage Range Compatibility: 400A to 3150A breakers


Part Number: 1221C21G03