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Available Now! 
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B1N2C40
Miniature Circuit Breaker, UL489, 2-Poles, C-Curve, 40A, 240VAC/125VDC, 10kA, Box Lugs
$36.87$36.87 -
Available Now! 
Available Now!LS Electric
0626036263
MCB, UL1077, 1-Pole, C-Curve, 16 Amp, 6kA, 277VAC, Thermal Magnetic Miniature Circuit Breaker
$11.05$11.05 -
LS Electric
0626052363
MCB, UL1077, 1-Pole, B-Curve, 15 Amp, 6kA, 277VAC, Thermal Magnetic Miniature Circuit Breaker
$11.05$11.05 -
Available Now! 
Available Now!Weg
MPW40-3-U010
Manual Motor Protector, 40A, 6.3-10A Overload Setting Range, 3-Pole, Screw Terminal, Rotary Handle, IP20
$63.16$63.16 -
LS Electric
0626033563
MCB, UL1077, 1-Pole, D-Curve, 10 Amp, 10kA, 120/240VAC, Thermal Magnetic Miniature Circuit Breaker
$11.05$11.05 -
Available Now! 
Available Now!Weg
UMBW-1D3-30
MCB, UL1077, 3-Pole, D-Curve, 30 Amp, 277/480Y VAC, 5kA, Thermal-Magnetic Miniature Circuit Breaker, IP20, UMBW Series
$30.55$30.55 -
LS Electric
0627058063
MCB, UL1077, 2-Pole, D-Curve, 8 Amp, 10kA, 240VAC, Thermal Magnetic Miniature Circuit Breaker
$23.65$23.65 -
$23.73$23.73 -
Available Now! 
Available Now!Weg
UMBW-1C3-30
MCB, UL1077, 3-Pole, C-Curve, 32 Amp, 277/480VAC, 5kA, Thermal-Magnetic Miniature Circuit Breaker, IP20, UMBW Series
$17.75$17.75 -
Available Now! 
Available Now!LS Electric
0627039763
MCB, UL1077, 2-Pole, D-Curve, 10 Amp, 10kA, 240VAC, Thermal Magnetic Miniature Circuit Breaker
$23.65$23.65 -
Available Now! 
Available Now!Noark
B1N2C50
Miniature Circuit Breaker, UL489, 2-Poles, C-Curve, 50A, 240VAC/125VDC, 10kA, Box Lugs
$36.87$36.87 -
LS Electric
0628046963
MCB, UL489, 3-Pole, C-Curve, 15 Amp, 10kA, 480Y/277VAC, Thermal Magnetic Miniature Circuit Breaker
$91.64$91.64
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