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Available Now! 
Available Now!LS Electric
0627056563
MCB, UL489, 2-Pole, C-Curve, 15 Amp, 10kA, 480Y/277VAC, Thermal Magnetic Miniature Circuit Breaker
$52.25$52.25 -
$63.04$63.04 -
Noark
B1E1C4
Miniature Circuit Breaker, UL1077, 1-Pole, C-Curve, 4A, 5kA, 277VAC, Supplementary Protection
$14.30$14.30 -
Weg
MPW40-3-C063
Manual Motor Protector, 40A, 0.40-0.63A Overload Setting Range, 3-Pole, Screw Terminal, Rotary Handle, IP20
$63.16$63.16 -
Available Now! 
Available Now!Weg
UMBW-4D1-35
MCB, UL489, 1-Pole, D-Curve, 35 Amp, 120VAC/60VDC, 10kA, Thermal-Magnetic Miniature Circuit Breaker, IP20, UMBW Series
$24.91$24.91 -
LS Electric
02040001UL
MCCB, 2-Pole, 15 Amp, 25kA@480VAC, Fixed Thermal/Magnetic, Lugs Line/Load Side, 5.12 x 2.01 x 3.44" (HWD), Susol UL MCCB UTE100 Series, UL Listed, Molded Case Circuit Breaker
$273.65$273.65 -
LS Electric
0626032163
MCB, UL1077, 1-Pole, C-Curve, 6 Amp, 10kA, 120/240VAC, Thermal Magnetic Miniature Circuit Breaker
$9.90$9.90 -
LS Electric
0626034963
MCB, UL1077, 1-Pole, B-Curve, 16 Amp, 6kA, 277VAC, Thermal Magnetic Miniature Circuit Breaker
$9.90$9.90 -
LS Electric
0627049563
MCB, UL489, 2-Pole, C-Curve, 4 Amp, 10kA, 480Y/277VAC, Thermal Magnetic Miniature Circuit Breaker
$49.76$49.76 -
$23.73$23.73 -
Available Now! 
Available Now!Noark
B1H2C2
Miniature Circuit Breaker, UL489, 2-Poles, C-Curve, 2A, 480Y/277VAC, 10kA, Box Lugs
$45.26$45.26 -
Available Now! 
Available Now!Noark
B1H3D20
Miniature Circuit Breaker, UL489, 3-Poles, D-Curve, 20A, 480Y/277VAC, 10kA, Box Lugs
$67.82$67.82
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