Square D

Square D HJA36020 20A 3 Pole Molded Case Circuit Breaker – Bolt On – 600V

In stock
SKU: HJA36020-NS GTIN/UPC: 785901600947
$699.00
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1 year warranty
30 day returns

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The Square D HJA36020 is a PowerPact molded case circuit breaker engineered for high-performance protection in commercial and industrial electrical distribution systems. Designed with a thermal magnetic non-interchangeable trip unit, this breaker delivers dependable overload and short-circuit protection to maintain safe and efficient system operation. Its HJA frame construction combined with a bolt-on mounting design ensures secure installation, rugged durability, and long-term operational reliability in demanding applications. Rated for both AC and DC applications up to 600V, the HJA36020 offers superior interrupting capability for advanced fault protection in critical power systems.

Product Specifications

  • Brand: Square D
  • Model: HJA36020
  • Product Type: Molded Case Circuit Breaker (MCCB)
  • Product Series: PowerPact
  • Frame Type: HJA / H Frame
  • Rated Current: 20 Ampere
  • Number of Poles: 3 Pole
  • Trip Unit Type: Thermal Magnetic Non-Interchangeable
  • Mounting Type: Bolt On
  • Operating Temperature Reference: 40°C
  • Trip Setting: 350–750
  • Terminal Type: Load End Standard
  • Application: Commercial and Industrial Power Distribution

Technical Specifications

  • Interrupting Capacity: 100kA @ 240VAC
  • Interrupting Capacity: 65kA @ 480Y/277VAC
  • Interrupting Capacity: 25kA @ 600VAC
  • Interrupting Capacity: 20kA @ 250VDC
  • Maximum Voltage Rating: 600VAC
  • Protection Type: Overload and Short Circuit Protection
  • Connection Type: Bolt-On Connection
  • Frame Construction: Molded Case Design
  • Standard Compliance: Industrial Circuit Protection Standards

Voltage and Ratings

  • Rated Operational Voltage: 240VAC / 480Y/277VAC / 600VAC / 250VDC
  • Maximum Voltage Capacity: 600VAC
  • Current Rating: 20A
  • Pole Configuration: 3 Pole
  • Interrupting Rating at 240VAC: 100 Kiloampere
  • Interrupting Rating at 480Y/277VAC: 65 Kiloampere
  • Interrupting Rating at 600VAC: 25 Kiloampere
  • Interrupting Rating at 250VDC: 20 Kiloampere

Product Data

  • Manufacturer: Square D
  • Product Series: PowerPact HJA Frame
  • Product Condition Support: New Surplus & Certified Reconditioned
  • Warranty: 1 Year In-House Warranty
  • Installation Type: Bolt-On Mounting
  • Terminal Configuration: Load End Standard
  • Product Use: Electrical Distribution and Circuit Protection Systems

Important Note

Product images are intended for identification purposes only and may represent a standard base model configuration. Accessories purchased together with the breaker can be professionally installed at no additional cost when detailed configuration instructions are provided during checkout. Installation, maintenance, and servicing should only be carried out by qualified electrical personnel in accordance with applicable electrical codes and manufacturer guidelines. The included one-year warranty covers repairs, labor, replacement parts, and standard shipping associated with recertification, excluding damage caused by misuse, improper installation, or normal operational wear and tear.
  • Type Circuit Breakers
  • Vendor Square D
  • Brand Square D

Returns are easy

You may return items within 30 days of delivery for a refund.

FREE Shipping on orders over $149.

My Circuit Breakers offers one to five day delivery in the United States. The variation depends on the chosen shipping speed and the warehouse location for the product(s).

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In rare circumstances, My Circuit Breakers may reserve up to 5 business days to complete shipment. Feel free to contact us if your order is time sensitive.

My Circuit Breakers provides a comprehensive 1-year warranty on both new and reconditioned products. Rest assured, all products are authentic OEM (original equipment manufacturer). Extended warranties are available upon request.