Square D HDL36020 20A 3P 600V Circuit Breaker | AmpState

Meet the Square D HDL36020 — a purpose-built circuit breaker designed for dependable protection in panelboards, load centers, and electrical distribution systems. With a 20 A rating spread across 3 poles and a 600 V maximum, this device is built to handle three‑phase circuits with precision while keeping feeder protection consistent across your installation. Ideal for replacement projects and stocking spares, it helps you maintain BOM alignment with the original part number HDL36020.

• Manufacturer: Square D
• Part Number: HDL36020
• Product Type: Circuit Breaker
• Amperage: 20 A
• Poles: 3
• Voltage: 600V
• Use case: Replacement in panelboards, load centers, and electrical distribution systems
• Availability: Available from AmpState

Why this 3‑pole, 600V breaker matters

For three‑phase electrical environments, the HDL36020 provides coordinated protection across all phases, ensuring balanced fault isolation and consistent trip characteristics. The 600V rating makes it suitable for many commercial and light industrial distribution setups, where reliable protection is essential for motors, feeders, and interconnected circuits.

Perfect for replacement and maintenance programs

Using genuine Square D hardware helps you maintain system integrity and BOM accuracy. This HDL36020 is the exact part you need when your original design calls for a 20 A, 3‑pole, 600 V protection device, keeping your existing panelboard or load center architecture intact without the guesswork of cross‑matching parts.

Practical use cases

• Replacing a failed or tripped 3‑phase circuit breaker in an established panelboard or load center.
• Stocking a spare to reduce downtime during planned maintenance or emergency outages.
• Ensuring BOM fidelity in projects that must mirror the original electrical distribution design.
• Installing in systems where 3‑phase protection and 600V distribution are standard practice.

Compatibility and support

To verify fit, match the original part number HDL36020, confirm the 3‑pole configuration, and confirm the 20 A, 600 V ratings align with your panelboard’s requirements. If you’re unsure about compatibility, AmpState offers assistance to confirm fit and keep your installation running smoothly — simply send a message and we’ll help verify the right part for your system.