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Available Now! 
Available Now!LS Electric
0627049363
MCB, UL489, 2-Pole, C-Curve, 2 Amp, 10kA, 480Y/277VAC, Thermal Magnetic Miniature Circuit Breaker
$55.52$55.52 -
LS Electric
0628039163
MCB, UL489, 3-Pole, B-Curve, 20 Amp, 10kA, 480Y/277VAC, Thermal Magnetic Miniature Circuit Breaker
$91.64$91.64 -
$29.62$29.62 -
Available Now! 
$59.22$59.22 -
Noark
B1D2C30
Miniature Circuit Breaker, UL489, 2-Poles, C-Curve, 30 Amp, 10kA, 250VDC, Box Lug, B1D Series
$59.66$59.66 -
Available Now! 
Available Now!Noark
B1E2C2
Miniature Circuit Breaker, UL1077, 2-Poles, C-Curve, 2A, 5kA, 480Y/277VAC, Supplementary Protection
$28.60$28.60 -
Available Now! 
Available Now!Noark
B1E2C30
Miniature Circuit Breaker, UL1077, 2-Poles, C-Curve, 30A, 5kA, 480Y/277VAC, Supplementary Protection
$28.60$28.60 -
Noark
B1E2D15
Miniature Circuit Breaker, UL1077, 2-Poles, D-Curve, 15A, 5kA, 480Y/277VAC, Supplementary Protection
$28.60$28.60 -
$67.82$67.82 -
$54.66$54.66 -
Sprecher and Schuh
L9-3/1/C
Miniature Circuit Breaker, C-Curve, 3 Amp, 277VAC/48VDC, 10kA, 1-Pole, UL489 / CSA / CE, IP20
$82.61$82.61 -
Weg
UBW225N-FTU125-3A
MCCB, 125A@480VAC, 35kA IC, with Lugs, 3-Pole, UL489, Fixed Thermal & Magnetic
$422.40$422.40
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