Siemens
MFC3M700
Siemens MFC3M700 Sentron MF Molded Case Circuit Breaker 700A 3-Pole 600V 50kA
Only 1 left
Free shippingShips next business day
$4,878.89
Molded Case Circuit Breakers
136 listings · 134 in stock
136 molded case circuit breakers listings from the brands you use, each one photographed. Free shipping in the lower 48.
Siemens
3VF9221-1KM10
Siemens 3VF9221-1KM10 Auxiliary Switch 5-15A 125VDC 250VAC 50/60Hz Industrial
Only 1 left
Free shippingShips next business day
$54.89
Westinghouse
LA3400NW
Westinghouse LA3400NW Molded Case Switch 400A 3-Pole 600VAC Cutler Hammer Eaton
Only 1 left
Free shippingShips next business day
$599.89
Fuji Electric
BU-FSB3100
Fuji Electric BU-FSB3100 Molded Case Circuit Breaker 100A 600VAC 3-Pole 40C MCCB
Only 1 left
Free shippingShips next business day
$143.89
Square D
FAL34030
Square D FAL34030 Molded Case Circuit Breaker 30A 480VAC 250VDC 3-Pole Series 2
Only 1 left
Free shippingShips next business day
$29.89
Siemens
SBPTM480
Siemens SBPTM480 SB-PT Module Energy Communicating Trip Unit 480V Electrical
Only 4 left
Free shippingShips next business day
$210.89
Eaton
NZMC1-A20
Eaton NZMC1-A20 Molded Case Circuit Breaker 20A 3 Pole 50Hz NZM1 Electrical MCCB
Only 2 left
Free shippingShips next business day
$125.89
Square D
KAL361756153
Square D KAL361756153 Molded Case Circuit Breaker 175A 600VAC 3-Pole Industrial
Only 1 left
Free shippingShips next business day
$499.89
Merlin Gerin
NSC160S
Merlin Gerin NSC160S Smart Circuit Breaker 160A 3 Pole 690VAC MCCB Schneider
Only 1 left
Free shippingShips next business day
$88.89
Square D
FAL26020
Square D FAL26020 Molded Case Circuit Breaker 20A 2 Pole 240V 600V Series 2 MCCB
Only 1 left
Free shippingShips next business day
$27.89
Merlin Gerin
NSF250H
Merlin Gerin Compact NSF250H 225A 3-Pole 600V Molded Case Circuit Breaker MCCB
Only 1 left
Free shippingShips next business day
$285.89
Allen-Bradley
X-220026
Allen-Bradley X-220026 Molded Case Circuit Breaker Industrial
Only 1 left
Free shippingShips next business day
$49.89
Siemens
EFC3M100
Siemens EFC3M100 Molded Case Circuit Breaker 100A 3P 415VAC EF Frame Sentron OEM
Only 1 left
Free shippingShips next business day
$366.89
Siemens
EFC3M080
Siemens EFC3M080 Molded Case Circuit Breaker 80A 3P 415VAC EF Frame Industrial
Only 1 left
Free shippingShips next business day
$426.89
Out of stock – we can often source these. Request a quote.
Square D
FI26030AB
Square D FI26030AB I-Line Molded Case Circuit Breaker 2P 30A 600V Industrial OEM
Out of stock
Sourcing on request
Notify me when Square D FI26030AB is back
Eaton
HFDDC3200W
Eaton HFDDC3200W HFD-DC Circuit Breaker 3 Pole 200 Amp 600 VDC Molded Case Panel
Out of stock
Sourcing on request
Notify me when Eaton HFDDC3200W is backGet a quote on Molded Case Circuit Breakers
Need more units than we list, a part you don't see here, or prices for a whole list? Send us the part numbers and quantities – we reply within 1 hour during business hours (Mon–Fri 9–3:30 CT).
Guides for Molded Case Circuit Breakers
- Circuit protectionMolded Case Circuit Breaker Ratings & ReplacementsFrame size, trip rating, interrupting rating (kA), voltage and slash ratings, trip units and mounting – and a checklist for a safe replacement.
- Parts identificationHow to Read Breaker & VFD Nameplates and Date CodesFrame, trip and interrupting ratings on breakers; input, output, duty ratings and series on drives – and where to look for the date of manufacture.