Energy » Circuit Breakers » Miniature Circuit Breakers (MCB) » South Carolina

Building Filters

23

Used Miniature Circuit Breakers (Mcb) in South Carolina, USA

SIEMENS 5SY4303-7 MCB C3 Circuit Breaker, 400V. 4B-51
- Manufacturer: Siemens
Items are spares/engineering demo hookups that were pulled from an industrial working environment. We repair all types of industrial automation including AC Servo Drives, Servo Motors, Operator Interface Panels, ...
$27 USD
Duncan, SC
SIEMENS 5SY43 MCB C3 CIRCUIT BREAKER, 3 POLE, 400V. 4B-51
- Manufacturer: Siemens
Items are spares/engineering demo hookups that were pulled from an industrial working environment. We repair all types of industrial automation including AC Servo Drives, Servo Motors, Operator Interface Panels, ...
$23 USD
Duncan, SC
GE EP60 UL Series Miniature Circuit Breaker EP61ULC03. Loc 4E-2
- Manufacturer: GE
GE EP60 UL Series Miniature Circuit Breaker EP61ULC03. Loc. 4E-2 New no box maintenance room spares and/or new liquidated machine take offs. May have minor scuffs or scratches when they were taken from storage. H...
$39 USD
Duncan, SC
ABB S201M-C6DC Miniature Circuit Breaker, 6A 220V. 4D-36
- Manufacturer: ABB
Items are spares/engineering demo hookups that were pulled from an industrial working environment. We repair all types of industrial automation including AC Servo Drives, Servo Motors, Operator Interface Panels, ...
$23 USD
Duncan, SC
ABB S203-C16 2CDS253001R0164 3P Miniature Circuit Breaker 4E-48
- Manufacturer: ABB
Palmetto Automation Inc. of Duncan SC specializes in buying, selling, and repairing obsolete Used, Refurbished, and New industrial electronic equipment. Most of our used equipment goes through basic power bench t...
$23 USD
Duncan, SC
Siemens 5SY4316-7 16-Amp 3 Pole 400 V Circuit Breaker 5SY43 MCB. Loc 4B
- Manufacturer: Siemens
Siemens 5SY4316-7 16 Amp 3 Pole 400 V Circuit Breaker 5SY43 MCB. Loc.4B New no box maintenance room spares and/or new liquidated machine take offs. May have minor scuffs or scratches when they were taken from sto...
$79 USD
Duncan, SC
Siemens 5SY4332-8 Circuit Breaker 5SY43-MCB-D32, -400V. 4D
- Manufacturer: Siemens
Used automation parts pulled from storage or the working environment. Tested to the best of our ability. Shows signs of normal use. Here at Palmetto Automation Inc. we endeavor to provide otherwise high cost part...
$22 USD
Duncan, SC
Square D EJB14015 Miniature Circuit Breakers Loc4D8
- Manufacturer: Square D
Square D EJB14015 Miniature Circuit Breakers Palmetto Automation Inc. of Duncan SC specializes in buying, selling, and repairing obsolete Used, Refurbished, and New industrial electronic equipment. Most of our us...
$53 USD
Duncan, SC

12

Overview

Miniature circuit breakers (MCBs) are compact protective switches that interrupt electrical flow in low‑voltage circuits when overloads or short circuits occur. Widely used in residential, commercial and light industrial panels, they offer resettable protection and come in single‑ to multi‑pole versions, various current ratings, breaking capacities and trip curves. MCBs typically mount on DIN rails and use thermal‑magnetic mechanisms; select units that match local standards, busbar size and application requirements.

FAQ

What should I check when buying an MCB?

Verify the nominal current (In), breaking capacity (kA), trip curve (B, C, D), number of poles, mounting type (DIN rail), and compliance with local standards (IEC/UL). Check physical condition, brand reputation and whether spare parts or datasheets are available.

How should MCBs be packed and shipped safely?

Ship in original or padded boxes to protect terminals and housing. Secure against moisture and vibration, label fragile electrical components, and use a carrier familiar with electrical goods. Include compliance certificates for customs if shipping internationally.

What routine maintenance or testing do MCBs need?

Perform visual inspections, tighten terminal connections to torque specs, cycle switches periodically, and conduct insulation and trip tests with appropriate equipment. Replace units showing overheating, physical damage, or inconsistent trips.