Technical overview, specifications and accessories for Hyundai U-Series molded case circuit breakers.
The Hyundai U-Series molded case circuit breaker (MCCB) family offers compact size, high breaking capacity and a wide range of current ratings from 30 A to 1600 A. Three main types are available – UAB, UCB and UPB – each providing different breaking capacities and dimensions to suit industrial and residential applications.
The document includes a quick‑selection table, detailed specifications, standard order codes, characteristic curves, accessory options and handling instructions. It also provides inspection and maintenance guidelines to ensure reliable operation over the product’s lifetime.
| Breaking capacity (UAB type) | up to 25 kA at AC380/415 V |
|---|---|
| Breaking capacity (UCB type) | up to 50 kA at AC380/415 V |
| Dimensions (UAB type) | W75 × H130 × D60 mm |
The UAB type provides a breaking capacity of up to 25 kA at AC380/415 V.
Inspect once after one month of operation, then every 2‑3 years within the first 10 years, and annually thereafter.