IP58 vs IP18
Head-to-head comparison of two IEC 60529 ingress protection ratings.
IP58 and IP18 are both IEC 60529 ingress protection codes, but they differ in solid-object protection (level 5 vs 1). IP58 is rated for dust-protected and continuous immersion (manufacturer-specified), while IP18 provides > 50 mm — back of hand and continuous immersion (manufacturer-specified).
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.
The IP18 classification guarantees protection against solid objects larger than 50 mm and protection against the effects of continuous immersion in water under conditions specified by the manufacturer.. It is an IEC 60529 ingress protection code combining first-digit (solid) level 1 with second-digit (liquid) level 8.
Detailed comparison
The stronger rating on each row is highlighted in emerald.
Solid protection (first digit)
IP58
5 — Dust-Protected
IP18
1 — > 50 mm — Back of Hand
Liquid protection (second digit)
IP58
8 — Continuous Immersion (manufacturer-specified)
IP18
8 — Continuous Immersion (manufacturer-specified)
Dust-tight
IP58
Limited
IP18
No
Water-jet resistant
IP58
Yes
IP18
Yes
Submersible
IP58
Yes
IP18
Yes
Outdoor suitable
IP58
Yes
IP18
Yes
The exact difference (IP58 vs IP18)
Solid protection
IP58
Level 5 — Dust-Protected
IP18
Level 1 — > 50 mm — Back of Hand
IP58 provides "Dust-Protected" (level 5), while IP18 provides "> 50 mm — Back of Hand" (level 1). IP58 is 4 levels higher.
Liquid protection
IP58
Level 8 — Continuous Immersion (manufacturer-specified)
IP18
Level 8 — Continuous Immersion (manufacturer-specified)
Both IP58 and IP18 share the same liquid protection: Continuous Immersion (manufacturer-specified).
NEMA equivalents
No direct NEMA equivalent.
No direct NEMA equivalent.
Recommendation
IP58 offers higher overall protection than IP18. Choose IP58 for harsher environments; IP18 may suffice for milder conditions and can be more cost-effective.