WEG UMBW Thermal-Magnetic MCB Catalog

This catalog provides detailed information on WEG’s UMBW Thermal-Magnetic Miniature Circuit Breakers, covering specifications, ratings, accessories, and application guidelines for industrial electrical protection.

Key Points

  • Includes UL489 Branch Circuit and UL1077 Equipment Protection approvals
  • Available in B, C, and D trip curves to suit various applications
  • Positive trip-free snap action mechanism for reliable switching
  • Accessories include auxiliary contacts, shunt trips, bell alarms, and bus bar systems
  • Wide current range from 1 to 63 Amps, with 1-, 2-, and 3-pole options
  • Compact 17.5mm width per pole with visual status indication
  • Technical data covers electrical/mechanical ratings, accessories, and tripping curves
  • Designed for both AC and DC voltages in one series