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Noark
B1E3D40
Miniature Circuit Breaker, UL1077, 3-Poles, D-Curve, 40A, 5kA, 480Y/277VAC, Supplementary Protection
$43.11$43.11 -
Noark
B1E3D10
Miniature Circuit Breaker, UL1077, 3-Poles, D-Curve, 10A, 5kA, 480Y/277VAC, Supplementary Protection
$43.11$43.11 -
Available Now! 
Available Now!Weg
UMBW-1C2-10
MCB, UL1077, 2-Pole, C-Curve, 10 Amp, 277/480Y VAC, 5kA, Thermal-Magnetic Miniature Circuit Breaker, IP20, UMBW Series
$18.14$18.14 -
Weg
UMBW-1D2-5
MCB, UL1077, 2-Pole, D-Curve, 5 Amp, 277/480Y VAC, 5kA, Thermal-Magnetic Miniature Circuit Breaker, IP20, UMBW Series
$22.56$22.56 -
Weg
UMBW-1B1-1
MCB, UL1077, 1-Pole, B-Curve, 1 Amp, 277VAC, 5kA, Thermal-Magnetic Miniature Circuit Breaker, UMBW Series
$11.75$11.75 -
Noark
B1E1C2
Miniature Circuit Breaker, UL1077, 1-Pole, C-Curve, 2A, 5kA, 277VAC, Supplementary Protection
$14.30$14.30 -
Weg
UMBW-1C2-15
MCB, UL1077, 2-Pole, C-Curve, 15 Amp, 277/480VAC, 5kA, Thermal-Magnetic Miniature Circuit Breaker, IP20, UMBW Series
$22.56$22.56 -
Noark
B1E1D40
Miniature Circuit Breaker, UL1077, 1-Pole, D-Curve, 40A, 5kA, 277VAC, Supplementary Protection
$14.30$14.30 -
Available Now! 
Available Now!Noark
B1E2P100
Miniature Circuit Breaker, UL1077, 2-Poles, 100A, 5kA, 480Y/277VAC, 125VDC, Supplementary Protection
$34.83$34.83 -
Weg
UMBW-1C2-20
MCB, UL1077, 2-Pole, C-Curve, 20 Amp, 277/480Y VAC, 5kA, Thermal-Magnetic Miniature Circuit Breaker, IP20, UMBW Series
$22.56$22.56 -
Available Now! 
Available Now!Noark
B1E1D3
Miniature Circuit Breaker, UL1077, 1-Pole, D-Curve, 3A, 5kA, 277VAC, Supplementary Protection
$14.30$14.30 -
Noark
B1E1C3
Miniature Circuit Breaker, UL1077, 1-Pole, C-Curve, 3A, 5kA, 277VAC, Supplementary Protection
$14.30$14.30
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