IP58 vs IP39K
Head-to-head comparison of two IEC 60529 ingress protection ratings.
IP58 and IP39K are both IEC 60529 ingress protection codes, but they differ in solid-object protection (level 5 vs 3) and liquid protection (level 8 vs 9K). IP58 is rated for dust-protected and continuous immersion (manufacturer-specified), while IP39K provides > 2.5 mm — tool / wire and high-pressure, high-temp water jets.
IP58 is dust-protected and rated for continuous immersion in water under manufacturer-specified conditions. A niche rating for equipment that must operate submerged while allowing limited dust ingress.
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.
Detailed comparison
The stronger rating on each row is highlighted in emerald.
Solid protection (first digit)
IP58
5 — Dust-Protected
IP39K
3 — > 2.5 mm — Tool / Wire
Liquid protection (second digit)
IP58
8 — Continuous Immersion (manufacturer-specified)
IP39K
9 — High-Pressure, High-Temp Water Jets
Dust-tight
IP58
Limited
IP39K
No
Water-jet resistant
IP58
Yes
IP39K
Yes
Submersible
IP58
Yes
IP39K
Yes
Outdoor suitable
IP58
Yes
IP39K
Yes
The exact difference (IP58 vs IP39K)
Solid protection
IP58
Level 5 — Dust-Protected
IP39K
Level 3 — > 2.5 mm — Tool / Wire
IP58 provides "Dust-Protected" (level 5), while IP39K provides "> 2.5 mm — Tool / Wire" (level 3). IP58 is 2 levels higher.
Liquid protection
IP58
Level 8 — Continuous Immersion (manufacturer-specified)
IP39K
Level 9 — High-Pressure, High-Temp Water Jets
IP58 handles Specified by manufacturer (Continuous Immersion (manufacturer-specified)), while IP39K handles 8–10 MPa (High-Pressure, High-Temp Water Jets). IP39K provides 1 level more liquid protection.
NEMA equivalents
No direct NEMA equivalent.
No direct NEMA equivalent.
Recommendation
IP58 offers higher overall protection than IP39K. Choose IP58 for harsher environments; IP39K may suffice for milder conditions and can be more cost-effective.