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S33821

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Schneider Electric S33821 is an undervoltage release accessory designed to automatically trip a circuit breaker when the control voltage drops below a predetermined threshold, ensuring safe operation in power distribution systems. It operates within a control voltage range of 100 to 130V AC/DC and is compatible with Masterpact NT and NW series circuit breakers. The device features a robust, field-installable construction with a plunger-actuated control type and spring return mechanism, weighing 5 lb. It is engineered for reliable performance in industrial environments, integrating seamlessly with the breaker's trip mechanism for fast response.

Key Features & Specifications
  • Manufacturer: Schneider Electric
  • Item Subcategory: Under Voltage Release
  • Family: Masterpact
  • Type: S
  • Weight: 5 lb
  • Control Voltage Minimum: 100 V
  • Control Voltage Maximum: 130 V
  • Compatible Frames: NT
  • Part Number: S33821
  • Device Type: Undervoltage Release
  • Compatible Series: Masterpact NT, NW
  • Operating Voltage: 100-130V AC/DC
  • Function: Automatic trip on undervoltage
  • Mounting: Field-installable accessory
  • Application: Molded case circuit breakers
  • Control Type: Plunger actuated
  • Spring return mechanism
  • Designed for industrial power distribution


Schneider Electric S33821 - Under Voltage Release 100-130V (Masterpact NT)