Square D HDA36100UD 100A 3-Pole 600 V Circuit Breaker

Square D HDA36100UD is a rugged 100 A, 3-pole, 600 V circuit breaker crafted for reliable overcurrent protection in three-phase electrical systems. As an authentic Square D component, it’s built to deliver consistent performance in demanding commercial and industrial environments where uptime and safety matter.

• Current rating: 100 A
• Poles: 3 (three-phase protection)
• Voltage rating: 600 V
• Part number: HDA36100UD
• Brand: Square D

Why this 3-Pole 600 V breaker stands out

Designed specifically for 3-phase distribution, the HDA36100UD provides balanced protection across all three conductors, helping to prevent overloads and short circuits in industrial power systems. The 600 V rating expands its suitability to higher-voltage applications commonly found in commercial facilities and light industrial environments. With this OEM replacement part, you’re aligning form, fit, and electrical characteristics with established Square D panels and distribution boards, reducing compatibility surprises during installation.

Ideal use cases

• Protection for three-phase feeders in commercial buildings, manufacturing lines, and data centers
• Replacement in existing Square D electrical panels where a 100 A, 3-pole, 600 V device is specified
• New projects requiring reliable, industry-standard circuit protection for 3-phase circuits

Installation & compatibility tips

Ensure the panel or distribution system is designed for 3-phase, 600 V operation and that the replacement part number matches HDA36100UD. By using the exact specification, you’ll maintain intended trip characteristics and electrical compatibility, helping secure dependable protection for your circuit.

Maintenance and best practices

Keep a spare HDA36100UD on hand for planned maintenance or unexpected outages. Regular inspection of connections and periodic testing of protection devices within your service plan can help sustain reliable performance in your three-phase electrical infrastructure.