Thomas & Betts 54478 - Under Voltage Release 200-220V (Masterpact)
Thomas & Betts 54478 - Under Voltage Release 200-220V (Masterpact)

Thomas & Betts 54478 - Under Voltage Release 200-220V (Masterpact)

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Thomas & Betts 54478 is an Under Voltage Release accessory designed for the Masterpact family of circuit breakers, providing automatic trip protection when control voltage drops below a set threshold. It operates with a control voltage range of 200 to 220 VAC, ensuring reliable disconnection during undervoltage conditions. This unit weighs 5 lb and is compatible with M and MP frame breakers, featuring a compact construction for seamless integration into existing panelboards. It complies with industry standards for industrial electrical safety and protection. Typical applications include motor control centers, switchgear, and distribution panels requiring undervoltage protection.

Key Features & Specifications
  • Type: Under Voltage Release
  • Voltage Rating: 200-220 VAC
  • Current Rating: Not specified
  • Dimensions: Not specified
  • Standards: Not specified
  • Applications: Motor control centers, switchgear, distribution panels
  • Switch Type: Not specified
  • Configuration: Not specified
  • Coil Voltage Maximum: 220 VAC
  • Temp Rating: Not specified
  • Shipping Dimensions: Not specified
  • Phase: Not specified
  • Voltage: 200-220 VAC
  • Amperage: Not specified
  • AIC rating: Not specified
  • Connection: Not specified
  • Poles: Not specified
  • Protection: Undervoltage
  • Functions: Trip on undervoltage
  • Frame Size: Not specified
  • Trip Type: Not specified
  • Panel Type: Not specified
  • Breaker Type: Masterpact
  • Control Voltage Minimum: 200 VAC
  • Control Voltage Maximum: 220 VAC
  • MCM Size: Not specified
  • Metal Type: Not specified
  • Panel Style: Not specified
  • 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: Not specified
  • Hz: Not specified
  • Coil Material: Not specified
  • 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: Not specified
  • Relay Style: Not specified
  • Coil Voltage Minimum: 200 VAC
  • Wire: Not specified
  • Amperage Maximum: Not specified
  • Amperage Minimum: Not specified
  • Nema Rating: Not specified
  • Switch Style: Not specified
  • Wire Size: Not specified
  • Certification: Not specified
  • Circuit Breaker Mounting Style: Not specified
  • Terminal Connection: Not specified
  • Frequency Rating: Not specified
  • Phase Connection: Not specified
  • Standards: Not specified
  • Compatible Frames: M, MP
  • Installation Type: Not specified
  • Item QTY: Not specified
  • Nema Starter Size: Not specified
  • Breaker Frame: Not specified
  • Current Rating: Not specified
  • 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: 60198654478
  • GTIN: 00601986544788