IP33 vs IP59K
Head-to-head comparison of two IEC 60529 ingress protection ratings.
IP33 and IP59K are both IEC 60529 ingress protection codes, but they differ in solid-object protection (level 3 vs 5) and liquid protection (level 3 vs 9K). IP33 is rated for > 2.5 mm — tool / wire and spraying water (up to 60°), while IP59K provides dust-protected and high-pressure, high-temp water jets.
IP33 protects against tools and 2.5 mm objects plus spraying water up to 60° from vertical. A practical rating for indoor equipment subject to light spray or for sheltered outdoor fixtures.
The IP59K classification guarantees dust-protected (limited ingress, no harmful deposit) 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 5 with second-digit (liquid) level 9K.
Detailed comparison
The stronger rating on each row is highlighted in emerald.
Solid protection (first digit)
IP33
3 — > 2.5 mm — Tool / Wire
IP59K
5 — Dust-Protected
Liquid protection (second digit)
IP33
3 — Spraying Water (up to 60°)
IP59K
9 — High-Pressure, High-Temp Water Jets
Dust-tight
IP33
No
IP59K
Limited
Water-jet resistant
IP33
No
IP59K
Yes
Submersible
IP33
No
IP59K
Yes
Outdoor suitable
IP33
No
IP59K
Yes
The exact difference (IP33 vs IP59K)
Solid protection
IP33
Level 3 — > 2.5 mm — Tool / Wire
IP59K
Level 5 — Dust-Protected
IP33 provides "> 2.5 mm — Tool / Wire" (level 3), while IP59K provides "Dust-Protected" (level 5). IP59K is 2 levels higher.
Liquid protection
IP33
Level 3 — Spraying Water (up to 60°)
IP59K
Level 9 — High-Pressure, High-Temp Water Jets
IP33 handles 80 kPa (tube) / 50 kPa (nozzle) (Spraying Water (up to 60°)), while IP59K handles 8–10 MPa (High-Pressure, High-Temp Water Jets). IP59K provides 6 levels more liquid protection.
NEMA equivalents
No direct NEMA equivalent.
No direct NEMA equivalent.
Recommendation
IP59K offers higher overall protection than IP33. Choose IP59K for harsher environments; IP33 may suffice for milder conditions and can be more cost-effective.