Molded Case Circuit Breakers (MCCB)

Shop molded case circuit breakers for industrial and commercial distribution systems, panelboards, switchboards, motor control centers, bus plugs, machinery, and enclosed-breaker applications.

Available configurations may include fixed or interchangeable thermal-magnetic trips, electronic LS/LSI/LSIG trip units, magnetic-only motor circuit protectors, 1-, 2-, 3- and 4-pole designs, and common voltage and interrupting ratings. Always verify the exact frame, trip, voltage, poles, kAIC, terminals, mounting, and listing before replacement.

Send the catalog number and label photos to sales@ampstate.com for compatibility review and a formal quote. View all circuit breakers.

Filters

Online Exclusive

SALE UP TO 25% OFF

Shop The Sale
Eaton FAZ-D63 3N 63 Amp 480 Volt Molded Case Circuit Breaker - Circuit Breakers
Eaton FAZ-D63 3N 63 Amp 480 Volt Molded Case Circuit Breaker - Circuit Breakers

Eaton FAZ-D63 3N 63 Amp 480 Volt Molded Case Circuit Breaker

Regular price $800.00 CAD
Sale price $800.00 CAD Regular price
Unit price
Eaton FAZ-D63/3N is a 63A, 480V, 3-pole molded case circuit breaker designed to safeguard branch...
Allen-Bradley 1746-NO8V - Output Module - Output Module

Square D LGL36400M37X 400A 3-Pole 600V Molded Case Circuit Breaker

Regular price $11,727.00 CAD
Sale price $11,727.00 CAD Regular price
Unit price
OverviewSquare D Industrial Electrical Part identified by part number LGL36400M37X. Suitable for maintenance, retrofit, and...
Square D ME236LI 225A 600 V Circuit Breaker - Circuit Breaker

Square D ME236LI 225A Circuit Breaker 600V MCCB

Regular price $510.00 CAD
Sale price $510.00 CAD Regular price
Unit price
The Square D ME236LI 225A 600 V Circuit Breaker is a rugged, dependable protection device...
Allen-Bradley 140M-H8P-D10-PD 100A 3-Pole 600 V Circuit Breaker - Circuit Breaker

Allen Bradley 140M H8P D10 PD 100A Molded Case Circuit Breaker 600V

Regular price $510.00 CAD
Sale price $510.00 CAD Regular price
Unit price
Meet the Allen-Bradley 140M-H8P-D10-PD—a rugged molded-case circuit breaker designed to protect three‑phase power systems with...
Square D MEL436LS 400A 600 V Circuit Breaker - Circuit Breaker

Square D MEL436LS 400A 600V Molded Case Circuit Breaker

Regular price $510.00 CAD
Sale price $510.00 CAD Regular price
Unit price
The Square D MEL436LS 400A 600V Circuit Breaker is a robust molded‑case protection device designed...
WONSEONG ELECTRIC 5-3-923 MOLDED CIRCUIT BREAKER 10A FREE - Circuit Breaker Panel

Wonseong Electric 5-3-923 Molded Case Circuit Breaker 10A

Regular price $770.00 CAD
Sale price $770.00 CAD Regular price
Unit price
Meet the WONSEONG ELECTRIC 5-3-923 Molded-Case Circuit Breaker—a compact, rugged 10A protection device designed to...
SCHNEIDER ELECTRIC LV510300 MOULDED CASE CIRCUIT BREAKER 690V - Circuit Breaker Panel

Schneider Electric LV510300 Molded Case Circuit Breaker 690V

Regular price $1,060.00 CAD
Sale price $1,060.00 CAD Regular price
Unit price
Meet the Schneider Electric LV510300 molded case circuit breaker—a reliable protection device engineered for robust...
HYUNDAI ELECTRIC HGM100S MOLDED CASE CIRCUT BREAKERS 63A 3POLES 100AF 20KA KOREA - Electrical Panel / Accessory

Hyundai Electric HGM100S 63A Molded Case Circuit Breaker 3-Pole 20kA

Regular price $843.00 CAD
Sale price $843.00 CAD Regular price
Unit price
Meet the HYUNDAI ELECTRIC HGM100S Molded Case Circuit Breaker — a purpose-built MCCB crafted for...
SCHNEIDER ELECTRIC LV516332 CVS160F 125A 36KA 3POLE MOULDED CASE CIRCUIT BREAKER - Circuit Breaker Panel

Schneider Electric CVS160F 125A 36kA 3-Pole Molded Case Circuit Breaker

Regular price $848.00 CAD
Sale price $848.00 CAD Regular price
Unit price
Schneider Electric CVS160F LV516332 is a reliable, three‑pole molded case circuit breaker designed to protect...
Square D 40 Amp 1 Pole 277 Volt Bolt-On Circuit Molded Case Breaker EJB16040 - 40 A 347 V 1-Pole Bolt-On Circuit

Square D EJB16040 40 Amp Molded Case Circuit Breaker 347 Volt 1 Pole

Regular price $710.00 CAD
Sale price $710.00 CAD Regular price
Unit price
Square D EJB16040 is a reliable 40 Amp, 1-pole bolt-on molded case circuit breaker designed...
Square D S32631 - Circuit Breaker | AmpState - Circuit Breakers

Square D S32631 Molded Case Circuit Breaker

Regular price $710.00 CAD
Sale price $710.00 CAD Regular price
Unit price
Discover reliable protection for your electrical systems with the Square D S32631 molded case circuit...
Square D S29371 - Circuit Breaker | AmpState - Circuit Breakers

Square D S29371 Molded Case Circuit Breaker

Regular price $710.00 CAD
Sale price $710.00 CAD Regular price
Unit price
The Square D S29371 molded case circuit breaker is engineered to deliver dependable branch circuit...
1 2 3 … 121 »
Sort by
  • Featured
  • Most relevant
  • Best selling
  • Alphabetically, A-Z
  • Alphabetically, Z-A
  • Price, low to high
  • Price, high to low
  • Date, old to new
  • Date, new to old