IP29K vs IP51
Head-to-head comparison of two IEC 60529 ingress protection ratings.
IP29K and IP51 are both IEC 60529 ingress protection codes, but they differ in solid-object protection (level 2 vs 5) and liquid protection (level 9K vs 1). IP29K is rated for > 12.5 mm — finger and high-pressure, high-temp water jets, while IP51 provides dust-protected and vertically dripping water.
With IP29K, an enclosure receives protection against solid objects larger than 12.5 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 2 with second-digit (liquid) level 9K.
With IP51, an enclosure receives dust-protected (limited ingress, no harmful deposit) and protection against vertically falling drops of water. Dripping water shall have no harmful effects.. It is an IEC 60529 ingress protection code combining first-digit (solid) level 5 with second-digit (liquid) level 1.
Detailed comparison
The stronger rating on each row is highlighted in emerald.
Solid protection (first digit)
IP29K
2 — > 12.5 mm — Finger
IP51
5 — Dust-Protected
Liquid protection (second digit)
IP29K
9 — High-Pressure, High-Temp Water Jets
IP51
1 — Vertically Dripping Water
Dust-tight
IP29K
No
IP51
Limited
Water-jet resistant
IP29K
Yes
IP51
No
Submersible
IP29K
Yes
IP51
No
Outdoor suitable
IP29K
Yes
IP51
No
The exact difference (IP29K vs IP51)
Solid protection
IP29K
Level 2 — > 12.5 mm — Finger
IP51
Level 5 — Dust-Protected
IP29K provides "> 12.5 mm — Finger" (level 2), while IP51 provides "Dust-Protected" (level 5). IP51 is 3 levels higher.
Liquid protection
IP29K
Level 9 — High-Pressure, High-Temp Water Jets
IP51
Level 1 — Vertically Dripping Water
IP29K handles 8–10 MPa (High-Pressure, High-Temp Water Jets), while IP51 handles 0.1 mm/min drip rate (Vertically Dripping Water). IP29K provides 8 levels more liquid protection.
NEMA equivalents
No direct NEMA equivalent.
No direct NEMA equivalent.
Recommendation
IP29K offers higher overall protection than IP51. Choose IP29K for harsher environments; IP51 may suffice for milder conditions and can be more cost-effective.