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Weg
UMBW-4C3-15
MCB, UL489, 3-Pole, C-Curve, 15 Amp (15A), 277/480Y VAC, 125VDC, 10kA, Thermal-Magnetic Miniature Circuit Breaker, IP20, UMBW Series, Recommended Replacement for UMBW-4B3-15 (14361333), UMBW-4B3-16 (14361335) and UMBW-4C3-16 (13641892)
$58.46$58.46 -
LS Electric
0626030463
MCB, UL1077, 1-Pole, B-Curve, 1 Amp, 10kA, 120/240VAC, Thermal Magnetic Miniature Circuit Breaker,
$7.71$7.71 -
Available Now! 
Available Now!Noark
B1N1C2
Miniature Circuit Breaker, UL489, 1-Pole, C-Curve, 2A, 240VAC/60VDC, 10kA, Box Lugs
$14.11$14.11 -
Noark
B1E3D50
Miniature Circuit Breaker, UL1077, 3-Poles, D-Curve, 50A, 5kA, 480Y/277VAC, Supplementary Protection
$34.51$34.51 -
LS Electric
0626050363
MCB, UL489, 1-Pole, C-Curve, 5 Amp, 10kA, 277VAC, Thermal Magnetic Miniature Circuit Breaker
$18.08$18.08 -
Noark
B1E3D40
Miniature Circuit Breaker, UL1077, 3-Poles, D-Curve, 40A, 5kA, 480Y/277VAC, Supplementary Protection
$34.51$34.51 -
Weg
UMBW-1C3-50
MCB, UL1077, 3-Pole, C-Curve, 50 Amp, 277/480Y VAC, 5kA, Thermal-Magnetic Miniature Circuit Breaker, IP20, UMBW Series
$24.05$24.05 -
Available Now! 
Available Now!LS Electric
0626050563
MCB, UL489, 1-Pole, C-Curve, 15 Amp, 10kA, 277VAC, Thermal Magnetic Miniature Circuit Breaker
$18.08$18.08 -
Altech Corp.
2CU20L
Circuit Breaker, UL489, 2-Pole, C-Curve, 20 Amp, 10kA, Branch Circuit Protection, Miniature Molded Case Circuit Breaker, IP20
$45.93$45.93 -
Available Now! 
Available Now!Noark
B1E1C2
Miniature Circuit Breaker, UL1077, 1-Pole, C-Curve, 2A, 5kA, 277VAC, Supplementary Protection
$11.48$11.48 -
Noark
B1E3D15
Miniature Circuit Breaker, UL1077, 3-Poles, D-Curve, 15A, 5kA, 480Y/277VAC, Supplementary Protection
$34.51$34.51 -
Available Now! 
Available Now!Weg
MPW40-3-U020
Manual Motor Protector, 40A, 16-20A Overload Setting Range, 3-Pole, Screw Terminal, Rotary Handle, IP20
$64.35$64.35
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