Our Most Popular Enclosures

Our best sellers represent the most popular and proven enclosure solutions across various industries, offering the perfect balance of durability, design flexibility, and reliable protection. From rugged outdoor enclosures to economical indoor project boxes, these customer favorites deliver quality you can count on. Explore our top-performing series backed by Polycase’s commitment to quality and customer satisfaction.

Polycase's top-rated electical enclosures provide trusted protection for electronics and electrical components across industries including alternative energy, agriculture, oil and gas, food and beverage, industrial automation, marine, and more. These models are chosen for their durability, design flexibility, and consistent performance in both indoor and outdoor environments.

Why Are These Enclosures Best Sellers?

Polycase’s most popular electrical enclosures are chosen for their ability to protect sensitive equipment in harsh conditions. Common applications include:

  • Protecting electronic devices and embedded systems
  • Safeguarding industrial control panels, sensors and switches
  • Withstanding the environmental demands of telecommunications equipment and other field-deployed systems

Because these models perform well in diverse environments, they’re often the first choice for engineers designing factory floors, IoT devices, field equipment, or custom electrical projects.

What Materials Are the Enclosures Made From?

Our best-selling enclosures are available in high-performance materials like polycarbonate, ABS plastic, and aluminum. Many options are UL Listed, making them suitable for demanding conditions.

What Features Make These Enclosures Preferred by Engineers?
  • UL Listed and IP-rated designs on select models for added protection in harsh environments, including options with IP68 waterproof ratings
  • Wide range of sizes to fit circuit boards, power supplies, and other custom components
  • Compatible accessories, like internal mounting panels, custom-designed to fit each box
  • Easy customization through Polycase's CNC machining and graphics services, with fast turnaround and no minimum order quantities
Find the Perfect Size for Your Project

Struggling to find the right fit? Use our Shop by Size tool to quickly filter enclosures by internal and external dimensions and discover the best options for your project.

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  1. HN-68 Waterproof Enclosure
    As low as $18.07 per unit
    Internal: 7.3" x 5.3" x 3.0"
    185 x 135 x 77 mm
    External: 7.7" x 5.7" x 3.3"
    197 x 146 x 84 mm
    Material: Polycarbonate
  2. Internal: 4.6" x 3.6" x 3.0"
    117 x 91 x 76 mm
    External: 5.2" x 4.2" x 3.2"
    133 x 107 x 83 mm
    Material: Polycarbonate
  3. HD-22F NEMA Polycarbonate Enclosure
    As low as $3.88 per unit
    Internal: 2.1" x 2.1" x 1.3"
    55 x 55 x 34 mm
    External: 2.6" x 2.6" x 1.6"
    67 x 67 x 41 mm
    Material: Polycarbonate
  4. ZQ-040404 Electrical Junction Box
    As low as $25.06 per unit
    Internal: 3.7" x 3.7" x 4.0"
    95 x 95 x 102 mm
    External: 4.4" x 4.4" x 4.3"
    112 x 112 x 110 mm
    Material: Polycarbonate
  5. Internal: 1.7" x 1.5" x 0.9"
    43 x 38 x 25 mm
    External: 1.9" x 1.7" x 1.1"
    50 x 45 x 28 mm
    Material: Aluminum
  6. Internal: 1.7" x 1.5" x 0.9"
    43 x 38 x 25 mm
    External: 1.9" x 1.7" x 1.1"
    50 x 45 x 28 mm
    Material: Aluminum
  7. ZH-060604 Hinged Junction Box
    As low as $37.74 per unit
    Internal: 5.7" x 5.7" x 4.8"
    146 x 146 x 124 mm
    External: 6.4" x 6.4" x 5.2"
    163 x 163 x 133 mm
    Material: Polycarbonate
  8. Internal: 4.3" x 4.3" x 2.1"
    109 x 109 x 55 mm
    External: 4.6" x 4.6" x 2.2"
    117 x 117 x 57 mm
    Material: ABS
  9. HN-88 Weatherproof Enclosure
    As low as $36.07 per unit
    Internal: 10" x 7.3" x 3.7"
    268 x 185 x 94 mm
    External: 11" x 7.7" x 4.0"
    279 x 197 x 102 mm
    Material: Polycarbonate
  10. Internal: 2.2" x 2.2" x 0.8"
    56 x 56 x 20 mm
    External: 2.5" x 2.5" x 0.9"
    64 x 64 x 23 mm
    Material: ABS
  11. ML-34F Outdoor NEMA Enclosure
    As low as $8.67 per unit
    Internal: 4.1" x 3.1" x 1.9"
    105 x 79 x 49 mm
    External: 4.5" x 3.5" x 2.2"
    115 x 90 x 57 mm
    Material: Polycarbonate
  12. outdoor electrical enclosure

    AMERICAN MADE | HP SERIES

    Engineered for reliability, the HP Series offers the weatherproof protection you need at a price you want. Available in black or gray, with an optional clear cover and various external mounting styles to best suit your project.

    SHOP THE HP SERIES
  13. Internal: 2.2" x 2.2" x 0.8"
    56 x 56 x 20 mm
    External: 2.5" x 2.5" x 0.9"
    64 x 64 x 23 mm
    Material: ABS
  14. WQ-42 Waterproof Junction Box
    As low as $21.29 per unit
    Internal: 9.1" x 3.3" x 3.6"
    232 x 85 x 93 mm
    External: 10" x 4.3" x 4.0"
    260 x 110 x 102 mm
    Material: Polycarbonate
  15. Internal: 2.2" x 1.3" x 0.6"
    57 x 35 x 15 mm
    External: 2.5" x 1.6" x 0.8"
    64 x 41 x 20 mm
    Material: ABS
  16. HN-45 IP-Rated Electronic Enclosure
    As low as $10.20 per unit
    Internal: 4.5" x 3.3" x 1.8"
    116 x 84 x 48 mm
    External: 5.0" x 3.7" x 2.5"
    127 x 95 x 65 mm
    Material: Polycarbonate
  17. P-1175TX Potting Box Enclosure
    As low as $0.46 per unit
    Internal: 0.8" x 0.8" x 0.7"
    22 x 22 x 19 mm
    External: 1.0" x 1.0" x 0.7"
    25 x 25 x 19 mm
    Material: ABS
  18. Internal: 9.6" x 5.6" x 2.9"
    246 x 144 x 74 mm
    External: 10" x 6.0" x 3.0"
    254 x 152 x 76 mm
    Material: ABS
  19. Internal: 3.6" x 1.7" x 0.9"
    93 x 43 x 23 mm
    External: 4.0" x 2.0" x 1.1"
    102 x 52 x 29 mm
    Material: ABS
  20. Internal: 3.6" x 1.7" x 0.9"
    93 x 43 x 23 mm
    External: 4.0" x 2.0" x 1.1"
    102 x 52 x 29 mm
    Material: ABS
  21. HN-57 NEMA 4X Enclosure
    As low as $14.33 per unit
    Internal: 6.3" x 4.5" x 2.7"
    160 x 116 x 70 mm
    External: 6.7" x 5.0" x 3.0"
    171 x 127 x 78 mm
    Material: Polycarbonate
  22. ML-24F Outdoor NEMA Enclosure
    As low as $7.99 per unit
    Internal: 4.1" x 2.2" x 1.7"
    105 x 57 x 44 mm
    External: 4.5" x 2.6" x 2.0"
    114 x 67 x 52 mm
    Material: Polycarbonate
  23. WQ-83 Hinged Weatherproof Enclosure
    As low as $305.88 per unit
    Internal: 29" x 22" x 6.9"
    752 x 560 x 176 mm
    External: 32" x 24" x 7.3"
    830 x 630 x 187 mm
    Material: Polycarbonate
  24. outdoor electrical enclosure

    AMERICAN MADE | HP SERIES

    Engineered for reliability, the HP Series offers the weatherproof protection you need at a price you want. Available in black or gray, with an optional clear cover and various external mounting styles to best suit your project.

    SHOP THE HP SERIES

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