IP35 vs IP37
Head-to-head comparison of two IEC 60529 ingress protection ratings.
IP35 and IP37 are both IEC 60529 ingress protection codes, but they differ in liquid protection (level 5 vs 7). IP35 is rated for > 2.5 mm — tool / wire and water jets (6.3 mm nozzle), while IP37 provides > 2.5 mm — tool / wire and temporary immersion (up to 1 m).
Built to withstand protection against solid objects larger than 2.5 mm and protection against water jets. Water projected by a 6.3 mm nozzle against the enclosure from any direction shall have no harmful effects.. Classified as IEC 60529 ingress protection code IP35, it pairs solid level 3 with liquid level 5.
Specified under IEC 60529, IP37 denotes protection against solid objects larger than 2.5 mm and protection against the effects of temporary immersion in water. Ingress of water in quantities causing harmful effects shall not be possible.. It is an IEC 60529 ingress protection code combining first-digit (solid) level 3 with second-digit (liquid) level 7.
Detailed comparison
The stronger rating on each row is highlighted in emerald.
Solid protection (first digit)
IP35
3 — > 2.5 mm — Tool / Wire
IP37
3 — > 2.5 mm — Tool / Wire
Liquid protection (second digit)
IP35
5 — Water Jets (6.3 mm nozzle)
IP37
7 — Temporary Immersion (up to 1 m)
Dust-tight
IP35
No
IP37
No
Water-jet resistant
IP35
Yes
IP37
Yes
Submersible
IP35
No
IP37
Yes
Outdoor suitable
IP35
Yes
IP37
Yes
The exact difference (IP35 vs IP37)
Solid protection
IP35
Level 3 — > 2.5 mm — Tool / Wire
IP37
Level 3 — > 2.5 mm — Tool / Wire
Both IP35 and IP37 share the same solid protection: > 2.5 mm — Tool / Wire.
Liquid protection
IP35
Level 5 — Water Jets (6.3 mm nozzle)
IP37
Level 7 — Temporary Immersion (up to 1 m)
IP35 handles 30 kPa (Water Jets (6.3 mm nozzle)), while IP37 handles Hydrostatic ~10 kPa at 1 m (Temporary Immersion (up to 1 m)). IP37 provides 2 levels more liquid protection.
NEMA equivalents
No direct NEMA equivalent.
No direct NEMA equivalent.
Recommendation
IP37 offers higher overall protection than IP35. Choose IP37 for harsher environments; IP35 may suffice for milder conditions and can be more cost-effective.