IP09K vs IP40
Head-to-head comparison of two IEC 60529 ingress protection ratings.
IP09K and IP40 are both IEC 60529 ingress protection codes, but they differ in solid-object protection (level 0 vs 4) and liquid protection (level 9K vs 0). IP09K is rated for no protection and high-pressure, high-temp water jets, while IP40 provides > 1 mm — small wires and no protection.
The IP09K rating offers no protection against solid objects 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 0 with second-digit (liquid) level 9K.
IP40 protects against small tools and wires (1 mm objects) but offers no water protection. Useful for indoor equipment needing finer ingress protection against small debris and tools.
Detailed comparison
The stronger rating on each row is highlighted in emerald.
Solid protection (first digit)
IP09K
0 — No Protection
IP40
4 — > 1 mm — Small Wires
Liquid protection (second digit)
IP09K
9 — High-Pressure, High-Temp Water Jets
IP40
0 — No Protection
Dust-tight
IP09K
No
IP40
No
Water-jet resistant
IP09K
Yes
IP40
No
Submersible
IP09K
Yes
IP40
No
Outdoor suitable
IP09K
Yes
IP40
No
The exact difference (IP09K vs IP40)
Solid protection
IP09K
Level 0 — No Protection
IP40
Level 4 — > 1 mm — Small Wires
IP09K provides "No Protection" (level 0), while IP40 provides "> 1 mm — Small Wires" (level 4). IP40 is 4 levels higher.
Liquid protection
IP09K
Level 9 — High-Pressure, High-Temp Water Jets
IP40
Level 0 — No Protection
IP09K provides "High-Pressure, High-Temp Water Jets" (level 9), while IP40 provides "No Protection" (level 0). IP09K is 9 levels higher.
NEMA equivalents
No direct NEMA equivalent.
No direct NEMA equivalent.
Recommendation
IP09K offers higher overall protection than IP40. Choose IP09K for harsher environments; IP40 may suffice for milder conditions and can be more cost-effective.