IP16 vs IP59K
Head-to-head comparison of two IEC 60529 ingress protection ratings.
IP16 and IP59K are both IEC 60529 ingress protection codes, but they differ in solid-object protection (level 1 vs 5) and liquid protection (level 6 vs 9K). IP16 is rated for > 50 mm — back of hand and powerful water jets (12.5 mm nozzle), while IP59K provides dust-protected and high-pressure, high-temp water jets.
IP16 is an ingress protection code that ensures protection against solid objects larger than 50 mm and protection against powerful water jets. Water projected in powerful jets by a 12.5 mm nozzle against the enclosure from any direction shall have no harmful effects.. It is an IEC 60529 ingress protection code combining first-digit (solid) level 1 with second-digit (liquid) level 6.
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)
IP16
1 — > 50 mm — Back of Hand
IP59K
5 — Dust-Protected
Liquid protection (second digit)
IP16
6 — Powerful Water Jets (12.5 mm nozzle)
IP59K
9 — High-Pressure, High-Temp Water Jets
Dust-tight
IP16
No
IP59K
Limited
Water-jet resistant
IP16
Yes
IP59K
Yes
Submersible
IP16
No
IP59K
Yes
Outdoor suitable
IP16
Yes
IP59K
Yes
The exact difference (IP16 vs IP59K)
Solid protection
IP16
Level 1 — > 50 mm — Back of Hand
IP59K
Level 5 — Dust-Protected
IP16 provides "> 50 mm — Back of Hand" (level 1), while IP59K provides "Dust-Protected" (level 5). IP59K is 4 levels higher.
Liquid protection
IP16
Level 6 — Powerful Water Jets (12.5 mm nozzle)
IP59K
Level 9 — High-Pressure, High-Temp Water Jets
IP16 handles 100 kPa (Powerful Water Jets (12.5 mm nozzle)), while IP59K handles 8–10 MPa (High-Pressure, High-Temp Water Jets). IP59K provides 3 levels more liquid protection.
NEMA equivalents
No direct NEMA equivalent.
No direct NEMA equivalent.
Recommendation
IP59K offers higher overall protection than IP16. Choose IP59K for harsher environments; IP16 may suffice for milder conditions and can be more cost-effective.