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Available Now! 
Available Now!Weg
UMBW-1C3-25
MCB, UL1077, 3-Pole, C-Curve, 25 Amp, 277/480Y VAC, 5kA, Thermal-Magnetic Miniature Circuit Breaker, IP20, UMBW Series
$30.55$30.55 -
Available Now! 
Available Now!LS Electric
02050067UL
MCCB, 3-Pole, 20 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
$277.06$277.06 -
LS Electric
0628029163
MCB, UL1077, 3-Pole, C-Curve, 50 Amp, 10kA, 240VAC, Thermal Magnetic Miniature Circuit Breaker
$29.81$29.81 -
LS Electric
0628032863
MCB, UL1077, 3-Pole, C-Curve, 32 Amp, 6kA, 480Y/277VAC, Thermal Magnetic Miniature Circuit Breaker
$22.79$22.79 -
LS Electric
0628034463
MCB, UL1077, 3-Pole, D-Curve, 63 Amp, 6kA, 480Y/277VAC, Thermal Magnetic Miniature Circuit Breaker
$29.81$29.81 -
$63.04$63.04 -
Noark
B1E3B35
Miniature Circuit Breaker, UL1077, 3-Poles, B-Curve, 35A, 5kA, 480Y/277VAC, Supplementary Protection
$41.88$41.88 -
Noark
B1E3C30
Miniature Circuit Breaker, UL1077, 3-Poles, C-Curve, 30A, 5kA, 480Y/277VAC, Supplementary Protection
$41.88$41.88 -
$56.18$56.18 -
Altech Corp.
MA1.6UM
Circuit Breaker, 3 Phase, Adjustable Trip, 1.6A, Handles High Inrush Loads of 3 Phase Devices
$120.81$120.81 -
Weg
MPW18-3-U001
Manual Motor Protector, 18A, 0.63-1A Overload Setting Range, 3-Pole, 690V, 50/60Hz, On/Off Pushbutton, Screw Terminal, IP20
$48.41$48.41 -
Weg
MPW40-3-U001
Manual Motor Protector, 40A, 0.63-1.0A Overload Setting Range, 3-Pole, Screw Terminal, Rotary Handle, IP20
$63.16$63.16
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