Dong-A DB53F MCCB 40A 3P 460V Industrial Circuit Breaker Molded Case

Dong-A DB53F MCCB 40A 3P 460V Molded-Case Circuit Breaker delivers dependable protection for three‑phase electrical distributions in industrial, commercial, and demanding residential environments. Engineered by Dong‑A, this 40A, 3‑pole device is a reliable choice for panel upgrades, retrofit projects, and maintenance replacements where consistent protection and quick service are essential.

Key specifications

• Amperage rating: 40A
• Voltage rating: 460V
• Poles: 3P (three‑pole) for balanced three‑phase protection
• Construction: Molded‑case design for durable, compact form factor
• Model: DB53F, Brand: Dong‑A
• Applications: Industrial electrical distribution, commercial panels, and service equipment

Why this MCCB stands out

• Trusted performance in retrofit and replacement scenarios: designed to slot into standard panel boards and feeders where a reliable, fast‑acting protection device is required.
• Three‑phase protection with a robust build: delivers dependable interruption during fault conditions to protect wiring and connected equipment.
• Ready for demanding environments: molded‑case construction withstands vibration, temperature swings, and routine maintenance handling.
• Maintenance‑friendly design: straightforward installation and replacement, reducing downtime during panel service work.

Who should consider the Dong-A DB53F 40A 3P 460V MCCB?

• Electricians performing panel upgrades or retrofit projects in industrial facilities
• Panel builders assembling distributed electrical systems for commercial spaces
• Maintenance, Repair, and Operations (MRO) teams stocking spare components for service calls

Use cases and practical scenarios

• Upgrading old or undersized breakers in three‑phase panels to improve protection and compliance
• Replacing failed MCCBs during routine maintenance to minimize downtime
• Serving as a ready‑to‑deploy spare for critical feeders and motor circuits

Installation and best‑practice notes

• Verify compatibility with your panel's bus configuration and mounting footprint before installation.
• Ensure the application matches the 40A, 460V, 3P rating to avoid nuisance trips or protection gaps.
• Consult electrical schematics and local codes for proper protective coordination and termination practices.

With the Dong‑A DB53F, you gain a dependable, three‑phase protection solution that supports reliable electrical distribution across your most demanding projects. Stock this 40A, 3‑pole, 460V MCCB for faster service responses, safer equipment operation, and smoother panel maintenance.