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Available Now! 
Available Now!Weg
UMBW-1D1-15
MCB, UL1077, 1-Pole, D-Curve, 15 Amp, 277VAC, 5kA, Thermal-Magnetic Miniature Circuit Breaker, IP20, UMBW Series
$11.75$11.75 -
Weg
UMBW-1D1-3
MCB, UL1077, 1-Pole, D-Curve, 3 Amp, 277VAC, 5kA, Thermal-Magnetic Miniature Circuit Breaker, IP20, UMBW Series
$11.75$11.75 -
Weg
UMBW-1D3-40
MCB, UL1077, 3-Pole, D-Curve, 40 Amp, 277/480Y VAC, 5kA, Thermal-Magnetic Miniature Circuit Breaker, IP20, UMBW Series
$30.55$30.55 -
Available Now! 
Available Now!Weg
UMBW-4C2-10
MCB, UL489, 2-Pole, C-Curve, 10 Amp, 277/480Y VAC, 125 VDC, 10kA, Thermal-Magnetic Miniature Circuit Breaker, IP20, UMBW Series
$50.29$50.29 -
LS Electric
02090048UL
Molded Case Circuit Breaker, 3-Pole, 225 Amp, 100kA at 240V, 65kA at 480V, 35kA at 600V, Fixed Thermal / Magnetic, Lugs Line / Load Side, 7.48 x 4.13 x 3.44" (HWD)
$841.89$841.89 -
LS Electric
0626032863
MCB, UL1077, 1-Pole, C-Curve, 50 Amp, 10kA, 120/240VAC, Thermal Magnetic Miniature Circuit Breaker
$7.47$7.47 -
LS Electric
0627046963
MCB, UL489, 2-Pole, C-Curve, 63 Amp, 10kA, 240VAC, Thermal Magnetic Miniature Circuit Breaker
$38.85$38.85 -
LS Electric
0627057363
MCB, UL1077, 2-Pole, B-Curve, 15 Amp, 10kA, 240VAC, Thermal Magnetic Miniature Circuit Breaker, NCNR
$14.31$14.31 -
LS Electric
0628031563
MCB, UL1077, 3-Pole, B-Curve, 32 Amp, 6kA, 480Y/277VAC, Thermal Magnetic Miniature Circuit Breaker
$22.79$22.79 -
Available Now! 
Available Now!LS Electric
0628046763
MCB, UL489, 3-Pole, C-Curve, 5 Amp, 10kA, 480Y/277VAC, Thermal Magnetic Miniature Circuit Breaker
$55.44$55.44 -
$42.04$42.04 -
ABL Sursum
2D8UR
Circuit Breaker, 2-Pole, D-Curve, 8 Amp, UL1077, 480Y/277VAC, 10kA, Supplementary Protection
$31.53$31.53
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