Square D | HDM36090 | Circuit Breaker | 90A | 3-Pole | 600V

The Square D HDM36090 Circuit Breaker is a purpose-built solution for demanding three-phase electrical systems. Rated at 90A and 600V, this 3-pole device delivers precise overcurrent protection for modern industrial panels, retrofit projects, and replacement scenarios where exact specs matter. Designed to integrate with Square D installations, it’s the reliable choice when matching the exact part number is critical for compatibility.

Key specifications

• Amperage: 90A
• Poles: 3-Pole
• Voltage rating: 600V
• Part number: HDM36090

Why this HDM36090 matters for your project

When you’re maintaining or upgrading a three-phase 600V system, the exact part reference becomes crucial. The HDM36090 offers a direct, vendor-specific solution that aligns with Square D panels and field-installed gear. Its 90A rating makes it suitable for protecting motors, compressors, and other heavy-load circuits, while the three-pole design ensures balanced protection across all phases.

Ideal use cases

• Maintenance of existing 3-Phase, 600V electrical networks where you need to replace a failed breaker with an exact-match part.
• Retrofit projects that require the same electrical specifications to maintain system performance and protective characteristics.
• Replacement scenarios in Square D environments where compatibility hinges on using the correct part number.

Compatibility and installation notes

Before ordering, confirm fit and ratings against your equipment. The part number is the most reliable reference for compatibility, so cross-check HDM36090 with your panel’s documentation and existing breakers. For installation, follow standard electrical safety practices and your panel manufacturer’s guidelines to ensure proper seating, wiring, and lever operation. If your service or equipment previously used a 90A, 3-pole, 600V protection scheme, this device is a straightforward, spec-matched replacement.

What to expect in real-world use

With the HDM36090 installed, you gain dependable three-phase overcurrent protection designed to interrupt fault currents and safeguard downstream equipment. This translates to reduced downtime from nuisance trips, consistent protection for motors and drives, and streamlined maintenance workflows when you need to source exact-match replacements fast.

Practical tips for best results

• Keep a record of the part number (HDM36090) for future replacements to ensure continued compatibility.
• Verify that your system voltage and three-pole configuration match the 600V, 3-Pole specification before purchasing.
• Use with appropriate wiring and enclosure hardware as per manufacturer and electrical codes to maintain proper protection and safety.

Secure, dependable protection for your 3-phase, 600V infrastructure starts with the right part. Choose the Square D HDM36090 when exact-fit replacement and maintenance-ready compatibility are your priorities.