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Available Now! 
Available Now!Noark
B1N1C5
Miniature Circuit Breaker, UL489, 1-Pole, C-Curve, 5A, 240VAC/60VDC, 10kA, Box Lugs
$9.99$9.99 -
$19.30$19.30 -
Weg
UMBW-1D1-10
MCB, UL1077, 1-Pole, D-Curve, 10 Amp, 277VAC, 5kA, Thermal-Magnetic Miniature Circuit Breaker, IP20, UMBW Series
$11.75$11.75 -
Available Now! 
Available Now!Weg
UMBW-4D1-30
MCB, UL489, 1-Pole, D-Curve, 30 Amp, 120VAC/60VDC, 10kA, Thermal-Magnetic Miniature Circuit Breaker, IP20, UMBW Series
$24.91$24.91 -
LS Electric
0626030563
MCB, UL1077, 1-Pole, B-Curve, 2 Amp, 10kA, 120/240VAC, Thermal Magnetic Miniature Circuit Breaker
$11.05$11.05 -
LS Electric
0626032763
MCB, UL1077, 1-Pole, C-Curve, 40 Amp, 10kA, 120/240VAC, Thermal Magnetic Miniature Circuit Breaker
$6.68$6.68 -
LS Electric
0626040463
MCB, UL489, 1-Pole, C-Curve, 32 Amp, 10kA, 120/240VAC, Thermal Magnetic Miniature Circuit Breaker
$15.68$15.68 -
LS Electric
0626044363
MCB, UL489, 1-Pole, D-Curve, 6 Amp, 10kA, 277VAC, Thermal Magnetic Miniature Circuit Breaker
$15.68$15.68 -
LS Electric
0626049963
MCB, UL489, 1-Pole, D-Curve, 30 Amp, 10kA, 120/240VAC, Thermal Magnetic Miniature Circuit Breaker
$15.68$15.68 -
LS Electric
0626050763
MCB, UL489, 1-Pole, D-Curve, 8 Amp, 10kA, 277VAC, Thermal Magnetic Miniature Circuit Breaker
$15.68$15.68 -
ABL Sursum
1B3UR
Circuit Breaker, 1-Pole, B-Curve, 3 Amp, UL1077, 277VAC, 10kA, Supplementary Protection
$15.76$15.76 -
$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