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Available Now! 
Available Now!Weg
UMBW-1D2-50
MCB, UL1077, 2-Pole, D-Curve, 50 Amp, 277/480Y VAC, 5kA, Thermal-Magnetic Miniature Circuit Breaker, IP20, UMBW Series
$22.56$22.56 -
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
$258.16$258.16 -
LS Electric
0626032163
MCB, UL1077, 1-Pole, C-Curve, 6 Amp, 10kA, 120/240VAC, Thermal Magnetic Miniature Circuit Breaker
$7.62$7.62 -
LS Electric
0626034963
MCB, UL1077, 1-Pole, B-Curve, 16 Amp, 6kA, 277VAC, Thermal Magnetic Miniature Circuit Breaker
$7.62$7.62 -
LS Electric
0627049563
MCB, UL489, 2-Pole, C-Curve, 4 Amp, 10kA, 480Y/277VAC, Thermal Magnetic Miniature Circuit Breaker
$38.28$38.28 -
Available Now! 
Available Now!Noark
B1E1C20
Miniature Circuit Breaker, UL1077, 1-Pole, C-Curve, 20A, 5kA, 277VAC, Supplementary Protection
$14.30$14.30 -
$23.73$23.73 -
LS Electric
0626031963
MCB, UL1077, 1-Pole, C-Curve, 3 Amp, 10kA, 120/240VAC, Thermal Magnetic Miniature Circuit Breaker
$7.62$7.62 -
LS Electric
0628038263
MCB, UL489, 3-Pole, D-Curve, 50 Amp, 10kA, 240VAC, Thermal Magnetic Miniature Circuit Breaker
$82.71$82.71 -
Noark
B1E1B1.6
Miniature Circuit Breaker, UL1077, 1-Pole, B-Curve, 1.6A, 5kA, 277VAC, Supplementary Protection
$14.30$14.30 -
Noark
B1E1B15
Miniature Circuit Breaker, UL1077, 1-Pole, B-Curve, 15A, 5kA, 277VAC, Supplementary Protection
$14.30$14.30 -
Noark
B1E1B6
Miniature Circuit Breaker, UL1077, 1-Pole, B-Curve, 6A, 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