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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
$30.55$30.55 -
LS Electric
0627039763
MCB, UL1077, 2-Pole, D-Curve, 10 Amp, 10kA, 240VAC, Thermal Magnetic Miniature Circuit Breaker
$16.30$16.30 -
LS Electric
0626032263
MCB, UL1077, 1-Pole, C-Curve, 10 Amp, 10kA, 120/240VAC, Thermal Magnetic Miniature Circuit Breaker
$7.62$7.62 -
Available Now! 
Available Now!LS Electric
0628046963
MCB, UL489, 3-Pole, C-Curve, 15 Amp, 10kA, 480Y/277VAC, Thermal Magnetic Miniature Circuit Breaker
$63.18$63.18 -
LS Electric
0626052363
MCB, UL1077, 1-Pole, B-Curve, 15 Amp, 6kA, 277VAC, Thermal Magnetic Miniature Circuit Breaker
$7.62$7.62 -
LS Electric
0626034763
MCB, UL1077, 1-Pole, B-Curve, 6 Amp, 6kA, 277VAC, Thermal Magnetic Miniature Circuit Breaker
$7.62$7.62 -
Available Now! 
Available Now!Weg
MPW40-3-U016
Manual Motor Protector, 40A, 10-16A Overload Setting Range, 3-Pole, Screw Terminal, Rotary Handle, IP20
$68.83$68.83 -
Available Now! 
Available Now!Noark
B1N2C40
Miniature Circuit Breaker, UL489, 2-Poles, C-Curve, 40A, 240VAC/125VDC, 10kA, Box Lugs
$36.87$36.87 -
LS Electric
0626036163
MCB, UL1077, 1-Pole, C-Curve, 10 Amp, 6kA, 277VAC, Thermal Magnetic Miniature Circuit Breaker
$7.62$7.62 -
$19.31$19.31 -
LS Electric
0626036363
MCB, UL1077, 1-Pole, C-Curve, 20 Amp, 6kA, 277VAC, Thermal Magnetic Miniature Circuit Breaker
$7.62$7.62 -
LS Electric
0628048063
MCB, UL1077, 3-Pole, C-Curve, 30 Amp, 10kA, 240VAC, Thermal Magnetic Miniature Circuit Breaker, NCNR
$25.97$25.97
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