8535.21.00.00 - For a voltage of less than 72.5 kV

This HTS category, 8535.21.00.00, specifically covers automatic circuit breakers designed for electrical circuits that operate at voltages *less than* 72.5 kV. These devices are crucial for protecting electrical systems from overcurrents and short circuits. They are designed to automatically interrupt the flow of electricity when a fault is detected, thereby preventing damage to equipment and potential fire hazards. Examples include molded case circuit breakers (MCCBs) and miniature circuit breakers (MCBs) commonly found in industrial, commercial, and residential electrical distribution systems.

This category is distinguished from its sibling, 8535.29.00, by a precise voltage threshold. While both fall under automatic circuit breakers for circuits exceeding 1,000 V, this specific code applies only to those rated for operation below 72.5 kV. The sibling category, 8535.29.00, would encompass automatic circuit breakers designed for voltages of 72.5 kV and above.

As this is a leaf node within the HTS structure, there are no further subcategories. Therefore, the classification hinges entirely on the voltage rating of the automatic circuit breaker. When classifying a product under this heading, the key determining factor is the stated operational voltage capacity of the device, ensuring it falls within the "less than 72.5 kV" parameter.