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Noark
B1E3C50
Miniature Circuit Breaker, UL1077, 3-Poles, C-Curve, 50A, 5kA, 480Y/277VAC, Supplementary Protection
$41.88$41.88 -
Available Now! 
Available Now!Noark
B1E3C63
Miniature Circuit Breaker, UL1077, 3-Poles, C-Curve, 63A, 5kA, 480Y/277VAC, Supplementary Protection
$41.88$41.88 -
Noark
B1E3D25
Miniature Circuit Breaker, UL1077, 3-Poles, D-Curve, 25A, 5kA, 480Y/277VAC, Supplementary Protection
$43.11$43.11 -
Weg
UBW250H-FTU250-3A
MCCB, 250A@480VAC, 65kA IC, with Lugs, 3-Pole, UL489, Fixed Thermal & Magnetic
$787.20$787.20 -
Weg
UBW800H-FTU800-3A
MCCB, 800A@480VAC, 65kA IC, with Lugs, 3-Pole, UL489, Fixed Thermal & Magnetic
$3,072.00$3,072.00 -
Weg
UMBW-1D1-10
MCB, UL1077, 1-Pole, D-Curve, 10 Amp, 277VAC, 5kA, Thermal-Magnetic Miniature Circuit Breaker, IP20, UMBW Series
$11.75$11.75 -
Noark
B1E2C63
Miniature Circuit Breaker, UL1077, 2-Poles, C-Curve, 63A, 5kA, 480Y/277VAC, Supplementary Protection
$28.60$28.60 -
Noark
B1E4C10
Miniature Circuit Breaker, UL1077, 4-Poles, C-Curve, 10A, 5kA, 480Y/277VAC, Supplementary Protection
$56.18$56.18 -
Available Now! 
Available Now!Carlo Gavazzi
GSB631PC10
Supplementary Circuit Protector, UL1077, 1 Pole, C-Curve, 10A Overload Range, 277VAC, 5kA, DIN Rail Mount, IP20, GSB63 Series
$8.17$8.17 -
$370.56$370.56 -
Weg
UBW400H-FTU400-3A
MCCB, 400A@480VAC, 65kA IC, with Lugs, 3-Pole, UL489, Fixed Thermal & Magnetic
$1,420.80$1,420.80 -
Weg
UMBW-1B1-8
MCB, UL1077, 1-Pole, B-Curve, 8 Amp, 277VAC, 5kA, Thermal-Magnetic Miniature Circuit Breaker, IP20, UMBW Series
$11.75$11.75
A circuit breaker will interrupt the flow of current in an electrical circuit, safeguarding surrounding electrical components and wiring by preventing circuit overloads and short circuits.
a.k.a. MCB, MCCB, molded case breaker, supplementary protection, UL1077, UL489, UL508, MMP, manual motor protector