Eaton WMZT1D03T 3A 1-Pole 277 V Circuit Breaker Potential Transformer

Introducing the Eaton WMZT1D03T, a compact 3 A, 1-Pole 277 V circuit breaker designed for precise protection in commercial and light industrial power systems. This Eaton part (WMZT1D03T) blends reliable overcurrent protection with a slim profile, making it an ideal choice when panel space is at a premium but dependable performance is non-negotiable.

Key specifications and real-world value

• Current rating: 3 A — provides selective protection for low-load circuits, control circuits, and lighting systems on 277 V networks.
• Pole configuration: 1-Pole — compact footprint suited for narrow breaker spaces within panels or distribution boards.
• Voltage rating: 277 V — tailored for commercial lighting and other 277 V applications common in offices, hotels, and facilities.
• Part number: WMZT1D03T — straightforward identification for ordering, replacement, or stocking within Eaton's family of protection devices.
• Brand and compatibility: Built to integrate with Eaton circuit protection systems, ensuring consistent electrical performance and simplified maintenance.

Use cases and practical applications

• Control circuits for HVAC, lighting, and automation that require tight current limits without sacrificing protection.
• Small-load loads in 277 V distribution setups where minimizing trip thresholds improves system reliability.
• Replacement in existing Eaton installations where a direct part-for-part match is preferred for compatibility and ease of service.

Why this model stands out

The WMZT1D03T isn’t just a breaker; it’s designed to align with Eaton’s system architecture, helping technicians maintain consistent protection characteristics across panels and feeders. Its 1-Pole 277 V rating provides a focused solution for dedicated circuits, enabling straightforward coordination with upstream protection and downstream devices. If your project requires precise overload protection in a compact footprint, this Eaton unit delivers predictable performance with a long service horizon.

Notes for installation and maintenance

When selecting this breaker, confirm that your panel is designed for 277 V operation and that a 3 A trip rating meets the circuit’s protection needs. Keep spares in line with your Eaton protection strategy to simplify replacements and preserve system integrity over time.