The WEG UMBW-1D1-30 is a 30A, 1-pole miniature circuit breaker designed for supplementary protection in control circuits and equipment. It features a D trip curve for handling high inrush currents, a voltage rating of 277/480V AC, and is UL 1077 listed. This compact breaker is suitable for protecting transformers, solenoids, and other devices with high starting loads in industrial and commercial applications.

The UMBW has a range from 1 to 63 Amps, available in 1,2, 3 poles, and B, C, D trip curves. Single pole and multi-pole thermal-magnetic miniature circuit breakers (MCBs) are in accordance with EN 60947-2, UL 1077 and UL 489 for DIN rail mounting with toggle actuation, visual status indication, and high interrupt capacity. A positively trip-free snap action mechanism ensures reliable switching behavior. A range of trip characteristics and add-on accessories make the UMBW suitable for a variety of applications.

• AC and DC voltages available in one series;
• UL489 branch circuit protective device;
• UL1077 equipment protection;
• 17.5mm width per pole;
• Visual status indication;
• Positive trip-free snap action mechanism to ensure reliable switching;
• Cuttable bus bar connecting system.