IP40 vs IP54
Head-to-head comparison of two IEC 60529 ingress protection ratings.
IP40 and IP54 are both IEC 60529 ingress protection codes, but they differ in solid-object protection (level 4 vs 5) and liquid protection (level 0 vs 4). IP40 is rated for > 1 mm — small wires and no protection, while IP54 provides dust-protected and splashing water (all directions).
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.
IP54 is dust-protected (limited ingress, no harmful deposit) and resists splashing water from any direction. A versatile rating for industrial and outdoor-covered equipment in dusty, damp environments.
Detailed comparison
The stronger rating on each row is highlighted in emerald.
Solid protection (first digit)
IP40
4 — > 1 mm — Small Wires
IP54
5 — Dust-Protected
Liquid protection (second digit)
IP40
0 — No Protection
IP54
4 — Splashing Water (all directions)
Dust-tight
IP40
No
IP54
Limited
Water-jet resistant
IP40
No
IP54
No
Submersible
IP40
No
IP54
No
Outdoor suitable
IP40
No
IP54
Yes
The exact difference (IP40 vs IP54)
Solid protection
IP40
Level 4 — > 1 mm — Small Wires
IP54
Level 5 — Dust-Protected
IP40 provides "> 1 mm — Small Wires" (level 4), while IP54 provides "Dust-Protected" (level 5). IP54 is 1 level higher.
Liquid protection
IP40
Level 0 — No Protection
IP54
Level 4 — Splashing Water (all directions)
IP40 provides "No Protection" (level 0), while IP54 provides "Splashing Water (all directions)" (level 4). IP54 is 4 levels higher.
NEMA equivalents
No direct NEMA equivalent.
Recommendation
IP54 offers higher overall protection than IP40. Choose IP54 for harsher environments; IP40 may suffice for milder conditions and can be more cost-effective.