CHU363RB – SQUARE D 3P100A 600V NON FUSED DISCONNECT NEMA 3R

A non-fused disconnect like the CHU363RB provides a means of electrical isolation only — it does not provide overcurrent protection. This is appropriate when upstream overcurrent protection (e.g., a breaker in the main panel) is already correctly sized for the circuit. If your local code or equipment requires the disconnect to also provide fusing, you would need a fused disconnect switch instead. Our team can help you determine which configuration is required for your specific installation.

Yes. A NEMA 3R rating means the enclosure is designed to protect against falling rain, sleet, and external ice formation, making it suitable for outdoor use in most Canadian climates — including rooftop HVAC disconnects and exterior wall-mount applications. For installations subject to extreme wind-driven rain, dust, or submersion, a higher NEMA rating (e.g., 4 or 4X) may be required. Contact us if you need guidance on enclosure selection for your site conditions.

Yes — the CHU363RB is a very common choice for air conditioning and HVAC equipment disconnects. Its 3-pole, 100A, 600V non-fused configuration and NEMA 3R outdoor-rated enclosure make it well-suited for mounting adjacent to rooftop units, condensers, and other outdoor mechanical equipment. Always verify that the disconnect's ampacity meets or exceeds the maximum overcurrent protection (MOP) rating listed on your HVAC equipment nameplate. Have questions about a specific unit? Reach out and we'll confirm compatibility.