IP48 vs IP51
Head-to-head comparison of two IEC 60529 ingress protection ratings.
IP48 and IP51 are both IEC 60529 ingress protection codes, but they differ in solid-object protection (level 4 vs 5) and liquid protection (level 8 vs 1). IP48 is rated for > 1 mm — small wires and continuous immersion (manufacturer-specified), while IP51 provides dust-protected and vertically dripping water.
Engineered to deliver protection against solid objects larger than 1.0 mm and protection against the effects of continuous immersion in water under conditions specified by the manufacturer.. Classified as IEC 60529 ingress protection code IP48, it pairs solid level 4 with liquid level 8.
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)
IP48
4 — > 1 mm — Small Wires
IP51
5 — Dust-Protected
Liquid protection (second digit)
IP48
8 — Continuous Immersion (manufacturer-specified)
IP51
1 — Vertically Dripping Water
Dust-tight
IP48
No
IP51
Limited
Water-jet resistant
IP48
Yes
IP51
No
Submersible
IP48
Yes
IP51
No
Outdoor suitable
IP48
Yes
IP51
No
The exact difference (IP48 vs IP51)
Solid protection
IP48
Level 4 — > 1 mm — Small Wires
IP51
Level 5 — Dust-Protected
IP48 provides "> 1 mm — Small Wires" (level 4), while IP51 provides "Dust-Protected" (level 5). IP51 is 1 level higher.
Liquid protection
IP48
Level 8 — Continuous Immersion (manufacturer-specified)
IP51
Level 1 — Vertically Dripping Water
IP48 handles Specified by manufacturer (Continuous Immersion (manufacturer-specified)), while IP51 handles 0.1 mm/min drip rate (Vertically Dripping Water). IP48 provides 7 levels more liquid protection.
NEMA equivalents
No direct NEMA equivalent.
No direct NEMA equivalent.
Recommendation
IP48 offers higher overall protection than IP51. Choose IP48 for harsher environments; IP51 may suffice for milder conditions and can be more cost-effective.