Industrial 21-A161KD4 400A 600 V Circuit Breaker

Industrial Circuit Breaker — Part Number 21-A161KD4 — is engineered for demanding power systems that require reliable, high-capacity protection. With a 400 A current rating and a 600 V voltage rating, this unit safeguards heavy-duty industrial circuits from overloads and short circuits, helping to minimize downtime and equipment damage in challenging environments.

• Current rating: 400 A
• Voltage rating: 600 V
• Part Number: 21-A161KD4

Where it shines in industrial settings

Designed for heavy workloads, the 21-A161KD4 fits distribution panels and protection schemes in manufacturing lines, large machinery feeders, and motor control environments. It provides decisive interruption when fault conditions occur, preserving the integrity of downstream equipment and the broader electrical system.

Why this 21-A161KD4 matters

In facilities with high-current motors, conveyors, presses, and other demanding loads, a single reliable circuit breaker can prevent cascading failures and costly outages. The 21-A161KD4 delivers robust, straightforward protection at a scale appropriate for industrial power networks, enabling safer maintenance windows and more predictable operation.

Who should consider this product

• Electrical contractors and panel builders assembling or upgrading industrial control circuits
• Plant engineers responsible for safeguarding heavy machinery and line power
• Maintenance teams requiring dependable protection for high-load feeders

Practical considerations and usage tips

• Ensure system voltage and load current align with 600 V and 400 A specifications to maintain optimal protection margins
• Keep a spare 21-A161KD4 on hand in your parts inventory to expedite replacements after trips
• Document the part number 21-A161KD4 in your asset management records to streamline future ordering and maintenance