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ABL Sursum
3B50UR
Circuit Breaker, 3-Pole, B-Curve, 50 Amp, UL1077, 480Y/277VAC, 10kA, Supplementary Protection
$50.15$50.15 -
$67.82$67.82 -
Noark
M1S150T3L
MCCB, UL489, M1S, 3 Pole, 150 Amp (150A), 50kA @ 240VAC, 35kA @ 480VAC, 14kA @ 600VAC, 20kA @ 600VDC, 150 A Frame, Adjustable Thermal/Magnetic Trip, Lug Line/Load Side Connection, Molded Case Circuit Breaker
$440.83$440.83 -
Available Now! 
Available Now!Weg
MPW40-3-D016
Manual Motor Protector, 40A, 1.0-1.6A Overload Setting Range, 3-Pole, Screw Terminal, Rotary Handle, IP20
$63.16$63.16 -
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
02050205UL
MCCB, 3-Pole, 100 Amp, 35kA@480VAC, Fixed Thermal/Magnetic, Lugs Line/Load Side, 5.12 x 2.99 x 3.44" (HWD), Susol UL MCCB UTE100 Series, UL Listed, Molded Case Circuit Breaker
$459.25$459.25 -
LS Electric
02090048UL
Molded Case Circuit Breaker, 3-Pole, 225 Amp, 100kA at 240V, 65kA at 480V, 35kA at 600V, Fixed Thermal / Magnetic, Lugs Line / Load Side, 7.48 x 4.13 x 3.44" (HWD)
$841.89$841.89 -
LS Electric
0628031563
MCB, UL1077, 3-Pole, B-Curve, 32 Amp, 6kA, 480Y/277VAC, Thermal Magnetic Miniature Circuit Breaker
$22.79$22.79 -
Available Now! 
Available Now!LS Electric
0628046763
MCB, UL489, 3-Pole, C-Curve, 5 Amp, 10kA, 480Y/277VAC, Thermal Magnetic Miniature Circuit Breaker
$55.44$55.44 -
$66.70$66.70 -
Available Now! 
Available Now!Noark
B1N3D50
Miniature Circuit Breaker, UL489, 3-Poles, D-Curve, 50A, 240VAC, 10kA, Box Lugs
$48.88$48.88 -
$56.18$56.18
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