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.


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.

UL489 Miniature Circuit Breakers
1 to 63A Models
C and D Trip Curves
from $15
UL489 Miniature Circuit Breakers
1 to 63A Models
C and D Trip Curves
from $30
UL489 Miniature Circuit Breakers
1 to 63A Models
C and D Trip Curves
from $45
Trip Devices, Auxiliaries &
Locking Devices

from $1
UL1077 Supplementary Protectors
1 to 63A Models
B, C, and D Trip Curves
from $7
UL1077 Supplementary Protectors
1 to 63A Models
B, C, and D Trip Curves
from $14
UL1077 Supplementary Protectors
1 to 63A Models
B, C, and D Trip Curves
from $21
Trip Devices, Auxiliaries &
Locking Devices

from $0.50
UL1077 Supplementary Protectors
1 to 63A Models

from $5.25
UL1077 Supplementary Protectors
1 to 63A Models

from $7
Trip Devices, Auxiliaries &
Locking Devices

from $10.50
IP65, Plastic
Mount MCBs or other
DIN 43880 profile devices
from $15
PRODUCT FEATURES
HIDE
MCB4 Image
MCB4 Series
MINIATURE CIRCUIT BREAKERS
  • DIN rail mount chassis
  • Current ratings up to 63A
  • C and D curve models
  • Wide range of accessories
  • Finger safe, captive screw, box lug terminals
  • UL489, UL486, IEC 60947-2
  • UL File # E477352

Applications:
  • Branch circuit protection to prevent damage to conductors
  • Protection of external loads such as motors, receptacles, HACR equipment, and others

MCB1 Image
MCB1 SERIES
SUPPLEMENTARY PROTECTORS
  • DIN rail mount chassis
  • Current ratings up to 63A
  • B, C, and D curve models
  • Wide range of accessories
  • Finger safe, captive screw, box lug terminals
  • UL1077, IEC 60947-2
  • UL File # E482436

Applications:
  • Individual component protection to keep parallel loads from tripping together
  • Installed within control circuits, lighting, and appliances
  • Protection of sensitive loads within an enclosure such as PLC units, power supplies, condensation heaters, fans, etc.
UL489 vs UL1077
SHOW
UL489 vs UL1077
UL489
  • A UL489 Miniature Circuit Breaker can be used for branch protection as the primary overcurrent device.
  • UL489 Miniature Circuit Breakers can also be used as supplemental protection within an appliance or other electrical equipment.
UL1077
  • UL1077 Supplementary Protectors are designed to be used only within an appliance or other electrical equipment to provide supplemental protection or as a means to open the circuit.
  • Supplementary Protectors cannot be used in place of a UL489 Branch Circuit Protector to provide primary overcurrent protection.
  • If a supplementary protector can be removed from the circuit and maintain proper protection, then the supplementary protector is being used correctly.