UL1077 Miniature Circuit Breakers
Uncompromising safety and comfort
A UL 1077 Miniature Circuit Breaker (MCB) functions as supplementary protection device used alongside a primary UL 489 branch circuit breaker. They offer additional overload protection for downstream equipment and sub circuits. ABB offers one of the most extensive ranges of UL 1077 MCBs.
Features
- Characteristics: B, C, D, K, Z
- Configurations: 1P, 1P+N, 2P, 3P, 3P+N, 4P
- Breaking capacities up to 25 kA
- Rated currents up to 63A
- Real contact position indication, directly connected to the moving contact
Benefits
- Extra-wide and complete range of MCBs to cover most applications and markets
- Compliance with worldwide product standards (IEC, UL, CSA)
- Space and time-saving thanks to the unique bottom-fixing auxiliary contact
- Established and certified quality
Product range
Please scroll to the right to see more columns.
| Trip | Poles | Interrupting | Voltage | Current |
B, C, D, K, Z | 1P - 3P | 10/5 kA | 480Y/277 V AC | 0.5 to 63A | |
C, K, Z | 1P - 4P | up to 10 kA | 480Y/277 V AC | 0.2 to 63A | |
B, C, D, K | 1P - 4P | up to 30 kA | 630Y/347 V AC | 0.5 to 63A | |
B, C, D, K | 1P - 4P | up to 20 kA | 480Y/277 V AC | 10 to 63A | |
B, C, D, K, Z | 1P - 4P | 10 kA | 480Y/277 V AC | 0.2 to 63A | |
K and Z | 1P - 4P AC | ST200MTR: 6 kA | 480Y / 277 V AC | 0.5 to 63A | |
B, C, D, K | 1P - 4P | up to 20 kA | 480Y/277 V AC | 80 to 100A |