Miniature Circuit Breakers

Miniature Circuit Breakers
Miniature Circuit Breakers (MCBs) are UL489 Listed and can be used for branch protection as the primary overcurrent device. Supplementary Protectors are UL 1077 Recognized and designed for supplemental protection within a control panel, appliance, or other electrical equipment. MCBs and supplementary protectors have fixed trip settings and do not require replacement upon being tripped, and instead they can be reset manually and reused.
Shop All MCB's
UL489 & UL1077 MCBs
1 to 63A Models
B, C and D Trip Curves
from $5.25

FMX MCB4
UL489 MCBs
1 to 63A Models
C and D Trip Curves
from $15

FMX MCB4 Accessories
UL489 Trip Devices, Auxiliaries
& Locking Devices

from $1

FMX MCB1
UL1077 Supplementary Protectors
1 to 63A Models
B, C, and D Trip Curves
from $7

FMX MCB1 Accessories
UL1077 Trip Devices, Auxiliaries
& Locking Devices

from $0.50

Chint MCB
UL1077 Supplementary Protectors
1 to 63A Models
B and D Trip Curves
from $5.25

Chint MCB Accessories
UL1077 Trip Devices, Auxiliaries
& Locking Devices

from $10.50

FMX DIN Module Enclosures
IP65, Plastic
Mount MCBs or other
DIN 43880 profile devices
from $15