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Siemens SB4ST120 - Shunt Trip 120VAC for SB Series

Siemens
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Siemens SB4ST120 is a shunt trip circuit breaker accessory designed to provide remote tripping capability for SB Series circuit breaker frames. This unit operates at a control voltage of 120VAC, supporting both minimum and maximum control voltage requirements of 120 volts. Weighing 5 lb, the shunt trip is compatible with SB, SBA, SBH, and SBS frame types and is UL Listed and CSA Certified for field installation. It is typically used in industrial power distribution systems requiring remote disconnect functionality for safety or emergency shutdown.

Key Features & Specifications
  • Manufacturer: Siemens
  • Item Subcategory: Shunt Trip
  • Family: SB Series
  • Type: SB
  • Weight: 5 lb
  • Control Voltage Minimum: 120 VAC
  • Control Voltage Maximum: 120 VAC
  • Compatible Frames: SB, SBA, SBH, SBS
  • Part Number: SB4ST120
  • Series/Frame: SB Series, 2000 Ampere Frame
  • Poles: Typically 3 or 4 poles (standard for SB breakers)
  • Interrupt Rating: Up to 65 kA at 480VAC (typical for SB 2000A frame)
  • Mounting Type: Vertical or horizontal bus connection
  • Trip Unit: Electronic trip with true RMS sensing
  • Certifications: UL Listed, CSA Certified