-
Available Now! 
Available Now!Noark
B1N1B0.5
1000000
Miniature Circuit Breaker, UL489, 1-Pole, B-Curve, 0.5A, 240VAC/60VDC, 10kA, Box Lugs
$19.30$19.30 -
Available Now! 
Available Now!Noark
B1E3B25
1000559 | Limited Stock Savings: 1 unit available at this price
Miniature Circuit Breaker, UL1077, 3-Poles, B-Curve, 25A, 5kA, 480Y/277VAC, Supplementary Protection
$32.80$32.80 -
Available Now! 
Available Now!Noark
B1N2B35
1000083
Miniature Circuit Breaker, UL489, 2-Poles, B-Curve, 35A, 240VAC/125VDC, 10kA, Box Lugs
$38.11$38.11 -
Available Now! 
Available Now!Noark
B1E2B50
1000501, Advertised Pricing Limited to MWA Stock! | Limited Stock Savings: 11 units available at this price
Miniature Circuit Breaker, UL1077, 2-Poles, B-Curve, 50A, 5kA, 480Y/277VAC, Supplementary Protection
$14.41$14.41 -
Available Now! 
Available Now!LS Electric
0627037363
627037363, BK63H 2P B20A 10kA 240VAC UL1077
MCB, UL1077, 2-Pole, B-Curve, 20 Amp, 10kA, 240VAC, Thermal Magnetic Miniature Circuit Breaker
$23.65$23.65 -
Available Now! 
Available Now!Weg
UMBW-1B1-3
14361513, Limited Availability, Replaced by UMBW-1C1-3 (14353582)
MCB, UL1077, 1-Pole, B-Curve, 3 Amp, 277VAC, 5kA, Thermal-Magnetic Miniature Circuit Breaker, IP20, UMBW Series
$11.75$11.75 -
Available Now! 
Available Now!Noark
B1E2B30
1000497, | Limited Stock Savings: 15 units available at this price
Miniature Circuit Breaker, UL1077, 2-Poles, B-Curve, 30A, 5kA, 480Y/277VAC, Supplementary Protection
$7.70$7.70 -
Available Now! 
Available Now!LS Electric
0626034463
626034463, BK63H 1P B2A 6kA 277VAC UL1077 | Limited Stock Savings: 2 units available at this price
MCB, UL1077, 1-Pole, B-Curve, 2 Amp, 6kA, 277VAC, Thermal Magnetic Miniature Circuit Breaker
$4.40$4.40 -
Available Now! 
Available Now!LS Electric
0628030863
628030863, BK63H 3P B3A 6kA 480Y/277VAC UL1077, | Limited Stock Savings: 3 units available at this price
MCB, UL1077, 3-Pole, B-Curve, 3 Amp, 6kA, 480Y/277VAC, Thermal Magnetic Miniature Circuit Breaker
$6.45$6.45 -
Noark
B1H1B7
1002104
Miniature Circuit Breaker, UL489, 1-Pole, 7A, B-Curve, 277VAC, 10kA, Box Lugs, DIN Rail Mount
$22.58$22.58 -
Sprecher and Schuh
L8-4/2/B
Circuit Breaker, Supplementary Protector, B-Curve, 4 Amp, 480Y/277VAC/96VDC, 10kA, 2-Pole, UL1077 / NFPA79 / CSA / CE, IP20
$108.87$108.87 -
Sprecher and Schuh
L8-4/1/B
Circuit Breaker, Supplementary Protector, B-Curve, 4 Amp, 277VAC/48VDC, 10kA, 1-Pole, UL1077 / NFPA79 / CSA / CE, IP20
$48.36$48.36
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