IP40
Last updated: Aug 9, 2026IP40 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.
Solid 4
> 1 mm — Small Wires
Liquid 0
No Protection
What IP40 means
The IP code IP40 is part of the IEC 60529 standard for ingress protection. The first characteristic numeral, 4, indicates the level of protection against solid objects and access to hazardous parts. The second numeral, 0, indicates the level of protection against the ingress of water. Together, these digits describe exactly what an enclosure rated IP40 can withstand.
For solid protection, the digit 4 means the enclosure is > 1 mm — small wires. Protected against access to hazardous parts with a wire. Protected against solid foreign objects of 1 mm diameter and greater. The test method is access probe (1.0 mm rigid test wire) shall not penetrate with adequate clearance.
For liquid protection, the digit 0 means the enclosure resists no protection. No special protection against the ingress of water. The test procedure is no test required.
IP40 vs IP54: IP54 adds dust protection and splashing-water resistance, a major upgrade for harsher indoor environments. When specifying IP40 for a project, confirm the rating certificate from the manufacturer and consider that seals degrade over time with temperature cycling, UV exposure, and chemical contact.
Full specification table
| Parameter | Solid digit (4) | Liquid digit (0) |
|---|---|---|
| Protection level | > 1 mm — Small Wires | No Protection |
| Description | Protected against access to hazardous parts with a wire. Protected against solid foreign objects of 1 mm diameter and greater. | No special protection against the ingress of water. |
| Test method | Access probe (1.0 mm rigid test wire) shall not penetrate with adequate clearance. | No test required. |
| Object size / water pressure | 1.0 mm wire | Not applicable |
| Test distance | Per standard | Not applicable |
| Test duration | Per standard | Not applicable |
Typical applications
Indoor electrical enclosures
Server rack PDUs
Laboratory instruments
NEMA equivalent
Recommended products for IP40
1 mm tool-proof enclosure
All IP40 comparisons
69 pairsIP40 offers higher overall protection than IP00. Choose IP40 for harsher environments; IP0
IP40 offers higher overall protection than IP01. Choose IP40 for harsher environments; IP0
IP40 offers higher overall protection than IP02. Choose IP40 for harsher environments; IP0
IP40 offers higher overall protection than IP03. Choose IP40 for harsher environments; IP0
IP04 and IP40 offer comparable overall protection; choose based on the specific protection
IP05 offers higher overall protection than IP40. Choose IP05 for harsher environments; IP4
IP06 offers higher overall protection than IP40. Choose IP06 for harsher environments; IP4
IP07 offers higher overall protection than IP40. Choose IP07 for harsher environments; IP4
IP08 offers higher overall protection than IP40. Choose IP08 for harsher environments; IP4
IP09K offers higher overall protection than IP40. Choose IP09K for harsher environments; I
IP40 offers higher overall protection than IP10. Choose IP40 for harsher environments; IP1
IP40 offers higher overall protection than IP11. Choose IP40 for harsher environments; IP1
IP40 offers higher overall protection than IP12. Choose IP40 for harsher environments; IP1
IP13 and IP40 offer comparable overall protection; choose based on the specific protection
IP14 offers higher overall protection than IP40. Choose IP14 for harsher environments; IP4
IP15 offers higher overall protection than IP40. Choose IP15 for harsher environments; IP4
IP16 offers higher overall protection than IP40. Choose IP16 for harsher environments; IP4
IP17 offers higher overall protection than IP40. Choose IP17 for harsher environments; IP4
IP18 offers higher overall protection than IP40. Choose IP18 for harsher environments; IP4
IP19K offers higher overall protection than IP40. Choose IP19K for harsher environments; I
IP40 offers higher overall protection than IP20. Choose IP40 for harsher environments; IP2
IP40 offers higher overall protection than IP21. Choose IP40 for harsher environments; IP2
IP22 and IP40 offer comparable overall protection; choose based on the specific protection
IP23 offers higher overall protection than IP40. Choose IP23 for harsher environments; IP4
IP24 offers higher overall protection than IP40. Choose IP24 for harsher environments; IP4
IP25 offers higher overall protection than IP40. Choose IP25 for harsher environments; IP4
IP26 offers higher overall protection than IP40. Choose IP26 for harsher environments; IP4
IP27 offers higher overall protection than IP40. Choose IP27 for harsher environments; IP4
IP28 offers higher overall protection than IP40. Choose IP28 for harsher environments; IP4
IP29K offers higher overall protection than IP40. Choose IP29K for harsher environments; I
IP40 offers higher overall protection than IP30. Choose IP40 for harsher environments; IP3
IP31 and IP40 offer comparable overall protection; choose based on the specific protection
IP32 offers higher overall protection than IP40. Choose IP32 for harsher environments; IP4
IP33 offers higher overall protection than IP40. Choose IP33 for harsher environments; IP4
IP34 offers higher overall protection than IP40. Choose IP34 for harsher environments; IP4
IP35 offers higher overall protection than IP40. Choose IP35 for harsher environments; IP4
IP36 offers higher overall protection than IP40. Choose IP36 for harsher environments; IP4
IP37 offers higher overall protection than IP40. Choose IP37 for harsher environments; IP4
IP38 offers higher overall protection than IP40. Choose IP38 for harsher environments; IP4
IP39K offers higher overall protection than IP40. Choose IP39K for harsher environments; I
IP41 offers higher overall protection than IP40. Choose IP41 for harsher environments; IP4
IP42 offers higher overall protection than IP40. Choose IP42 for harsher environments; IP4
IP43 offers higher overall protection than IP40. Choose IP43 for harsher environments; IP4
IP44 offers higher overall protection than IP40. Choose IP44 for harsher environments; IP4
IP45 offers higher overall protection than IP40. Choose IP45 for harsher environments; IP4
IP46 offers higher overall protection than IP40. Choose IP46 for harsher environments; IP4
IP47 offers higher overall protection than IP40. Choose IP47 for harsher environments; IP4
IP48 offers higher overall protection than IP40. Choose IP48 for harsher environments; IP4
IP49K offers higher overall protection than IP40. Choose IP49K for harsher environments; I
IP50 offers higher overall protection than IP40. Choose IP50 for harsher environments; IP4
IP51 offers higher overall protection than IP40. Choose IP51 for harsher environments; IP4
IP52 offers higher overall protection than IP40. Choose IP52 for harsher environments; IP4
IP53 offers higher overall protection than IP40. Choose IP53 for harsher environments; IP4
IP54 offers higher overall protection than IP40. Choose IP54 for harsher environments; IP4
IP55 offers higher overall protection than IP40. Choose IP55 for harsher environments; IP4
IP56 offers higher overall protection than IP40. Choose IP56 for harsher environments; IP4
IP57 offers higher overall protection than IP40. Choose IP57 for harsher environments; IP4
IP58 offers higher overall protection than IP40. Choose IP58 for harsher environments; IP4
IP59K offers higher overall protection than IP40. Choose IP59K for harsher environments; I
IP60 offers higher overall protection than IP40. Choose IP60 for harsher environments; IP4
IP61 offers higher overall protection than IP40. Choose IP61 for harsher environments; IP4
IP62 offers higher overall protection than IP40. Choose IP62 for harsher environments; IP4
IP63 offers higher overall protection than IP40. Choose IP63 for harsher environments; IP4
IP64 offers higher overall protection than IP40. Choose IP64 for harsher environments; IP4
IP65 offers higher overall protection than IP40. Choose IP65 for harsher environments; IP4
IP66 offers higher overall protection than IP40. Choose IP66 for harsher environments; IP4
IP67 offers higher overall protection than IP40. Choose IP67 for harsher environments; IP4
IP68 offers higher overall protection than IP40. Choose IP68 for harsher environments; IP4
IP69K offers higher overall protection than IP40. Choose IP69K for harsher environments; I