IP39K vs IP56
Head-to-head comparison of two IEC 60529 ingress protection ratings.
IP39K and IP56 are both IEC 60529 ingress protection codes, but they differ in solid-object protection (level 3 vs 5) and liquid protection (level 9K vs 6). IP39K is rated for > 2.5 mm — tool / wire and high-pressure, high-temp water jets, while IP56 provides dust-protected and powerful water jets (12.5 mm nozzle).
IP39K is an ingress protection code that ensures protection against solid objects larger than 2.5 mm and resistance to high-pressure (8–10 MPa), high-temperature (80 °C) water jets. It is an IEC 60529 ingress protection code combining first-digit (solid) level 3 with second-digit (liquid) level 9K.
IP56 is dust-protected and resists powerful water jets (12.5 mm nozzle, 100 kPa). Suited to outdoor equipment subjected to heavy rain or hose-directed water.
Detailed comparison
The stronger rating on each row is highlighted in emerald.
Solid protection (first digit)
IP39K
3 — > 2.5 mm — Tool / Wire
IP56
5 — Dust-Protected
Liquid protection (second digit)
IP39K
9 — High-Pressure, High-Temp Water Jets
IP56
6 — Powerful Water Jets (12.5 mm nozzle)
Dust-tight
IP39K
No
IP56
Limited
Water-jet resistant
IP39K
Yes
IP56
Yes
Submersible
IP39K
Yes
IP56
No
Outdoor suitable
IP39K
Yes
IP56
Yes
The exact difference (IP39K vs IP56)
Solid protection
IP39K
Level 3 — > 2.5 mm — Tool / Wire
IP56
Level 5 — Dust-Protected
IP39K provides "> 2.5 mm — Tool / Wire" (level 3), while IP56 provides "Dust-Protected" (level 5). IP56 is 2 levels higher.
Liquid protection
IP39K
Level 9 — High-Pressure, High-Temp Water Jets
IP56
Level 6 — Powerful Water Jets (12.5 mm nozzle)
IP39K handles 8–10 MPa (High-Pressure, High-Temp Water Jets), while IP56 handles 100 kPa (Powerful Water Jets (12.5 mm nozzle)). IP39K provides 3 levels more liquid protection.
NEMA equivalents
No direct NEMA equivalent.
Recommendation
IP39K offers higher overall protection than IP56. Choose IP39K for harsher environments; IP56 may suffice for milder conditions and can be more cost-effective.