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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!LS Electric
0627056663
MCB, UL489, 2-Pole, D-Curve, 5 Amp, 10kA, 480Y/277VAC, Thermal Magnetic Miniature Circuit Breaker
$55.52$55.52 -
$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 -
Available Now! 
Available Now!Noark
B1N1D15
Miniature Circuit Breaker, UL489, 1-Pole, D-Curve, 15A, 240VAC/60VDC, 10kA, Box Lugs
$19.30$19.30 -
Available Now! 
Available Now!Noark
B1N3D50
Miniature Circuit Breaker, UL489, 3-Poles, D-Curve, 50A, 240VAC, 10kA, Box Lugs
$56.18$56.18 -
$56.18$56.18 -
Weg
UMBW-4D2-60
MCB, UL489, 2-Pole, D-Curve, 60 Amp, 277/480VAC, 125VDC, 10kA, Thermal-Magnetic Miniature Circuit Breaker, IP20, UMBW Series
$50.29$50.29 -
$29.62$29.62 -
Noark
B1D2D63
Miniature Circuit Breaker, UL489, 2-Poles, D-Curve, 63 Amp, 10kA, 250VDC, Box Lug, B1D Series
$59.66$59.66 -
Available Now! 
Available Now!Weg
UMBW-1D2-1
MCB, UL1077, 2-Pole, D-Curve, 1 Amp, 277/480Y VAC, 5kA, Thermal-Magnetic Miniature Circuit Breaker, IP20, UMBW Series
$22.56$22.56 -
Weg
UMBW-4D2-40
MCB, UL489, 2-Pole, D-Curve, 40 Amp, 277/480VAC, 125VDC, 10kA, Thermal-Magnetic Miniature Circuit Breaker, IP20, UMBW Series
$50.29$50.29
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