Eaton WMZT1D04 4A 1-Pole 480 V Circuit Breaker Potential Transformer

Eaton WMZT1D04 is a compact 4 A, 1-pole circuit breaker designed for 480 V electrical systems. With part number WMZT1D04, this unit is built to deliver reliable overcurrent protection while aligning with Eaton's trusted protection and metering ecosystem. When used in applications that pair a potential transformer with protection and monitoring, this breaker supports precise control and safe operation.

Key specifications

• Current rating: 4 A
• Poles: 1
• Voltage rating: 480 V
• Part number: WMZT1D04
• Brand: Eaton

Smart applications

Ideal for protecting small branch circuits within 480 V distribution panels, data centers, motor control centers, and equipment racks where space is at a premium. Its single-pole design minimizes footprint while ensuring dependable protection for loads connected through a potential transformer-based monitoring or relay circuit.

Why this Eaton unit stands out

Unlike generic low-current breakers, the WMZT1D04 is purpose-built to integrate with Eaton’s protection and metering workflows. The 4 A rating makes it well-suited for lighter loads or pilot circuits that require controlled tripping behavior without compromising safety. A 480 V rating ensures compatibility with mid- to high-voltage distribution schemes common in industrial environments, while the Eaton lineage provides consistent compatibility with related panels and accessories.

Practical use cases and benefits

• Protect a small, meter-fed circuit in a 480 V distribution panel while enabling monitoring through a connected potential transformer.
• Reduces nuisance trips on low-load circuits and supports accurate protection-relay signaling for improved system reliability.
• Ensure pairing with compatible metering/relay hardware and panel enclosure to maximize protection performance.

How to get the most from your WMZT1D04

When selecting this unit, align it with your Eaton-compatible panel and metering setup. Keep the part number handy for procurement and future replacements, and plan installation in accordance with standard 480 V distribution practices to maintain safe, effective protection across your electrical system.