How to Read IP Ingress Protection Ratings: What Each of the Two Digits Means

The first digit measures the ability of the lock body or housing to resist the entry of solid objects, with seven levels from 0 to 6. Level 0 means no protection. Level 1 protects against objects larger than 50mm (e.g., the back of a hand). Level 2 protects against objects up to 12.5mm (e.g., fingers). Level 3 protects against objects up to 2.5mm (e.g., tools and thick wires). Level 4 protects against objects up to 1mm (e.g., thin wires and small screws). Level 5 is dust-protected (not fully sealed, but dust ingress does not interfere with operation). Level 6 is dust-tight (completely prevents dust ingress). For industrial enclosures, the common requirements are IP5x or IP6x. The former allows minimal dust ingress that must not affect mechanical operation, while the latter requires complete sealing. When requesting a quote, simply saying "dustproof" is insufficient; buyers must specify whether they need IP5x or IP6x, as these two levels differ significantly in sealing design, gasket materials, and machining precision costs.

The second digit measures liquid protection, with ten levels from 0 to 9, but in practice, industrial lock bodies and enclosures commonly use levels 0 to 8. Level 0 means no protection. Level 1 protects against vertically falling water drops. Level 2 protects against vertically falling water drops when the enclosure is tilted up to 15 degrees. Level 3 protects against spraying water (within 60 degrees). Level 4 protects against splashing water from any direction. Level 5 protects against low-pressure water jets. Level 6 protects against powerful water jets. Level 7 allows temporary immersion in water up to 1 meter deep. Level 8 allows continuous immersion in water deeper than 1 meter (the exact depth is defined by the manufacturer). Level 9 corresponds to high-temperature, high-pressure cleaning. For enclosures and distribution boxes, IPx4 (splashing water) is typically suitable for indoor areas with cleaning operations, IPx5 or IPx6 is suitable for outdoor or semi-outdoor environments, and IPx7 and IPx8 are used for underground equipment rooms or humid areas that may be temporarily submerged. Buyers should note that IPx7 is not equivalent to IPx6: the former is an immersion test, while the latter is a jet test, and the two scenarios impose different requirements on the sealing structure.

The IP rating required for locks on industrial cabinets and distribution boxes depends on the installation location and the degree of environmental exposure. For indoor control cabinets in dry environments, IP40 or IP54 is usually sufficient. For outdoor cabinets, semi-outdoor distribution boxes, or areas that may be exposed to rain, IP65 is recommended. For underground equipment rooms, humid factories, or areas subject to brief submersion, IP67 or higher is needed. Distribution boxes have an additional consideration: when the lock is located near ventilation openings or heat dissipation holes, dust and moisture may enter through other paths, so the overall enclosure's IP rating and the lock's own IP rating should be evaluated separately. Buyers should first assess the types of dust and water sources the lock will encounter, then determine the target rating, rather than simply applying the highest specification. Jin Tay Industries' smart lock platform supports padlock and cabinet lock formats and can be configured according to the application, but specific IP ratings must be confirmed based on the actual product.

When asking lock suppliers about IP specifications, buyers should prepare four pieces of information: the installation environment (indoor/outdoor/underground), the main exposure sources (types of dust, water contact methods), the expected service life and maintenance cycle, and the target protection rating of the overall system. If a supplier only answers 'we can achieve IP65,' that is not sufficient. Buyers should further confirm: Is the test conducted by a third-party laboratory or in-house? Is the test sample the lock alone or including the installed state? What are the gasket material and aging life? These questions help buyers assess the supplier's depth of understanding of protection design. In the OEM process, Jin Tay Industries provides complete support from DFM design evaluation to testing and certification, but specific certification details must be confirmed based on the actual specifications and product line.

Jintai Industrial's two main pillars cover travel security hardware and IoT smart lock platforms. For industrial enclosures and electrical distribution boxes, lock body designs can undergo DFM design evaluation based on the customer-specified IP rating, and are delivered through a complete process from mold development, prototyping and verification, testing and certification, to mass production. For IoT smart locks, the integration of Bluetooth, NFC, RFID, and cloud connectivity modules also requires consideration of sealing design to prevent electronic components from becoming weak points for moisture ingress. The specific achievable IP ratings, applicable product lines, and certification details must be confirmed based on actual specifications and project requirements. Buyers are advised to directly provide a description of the target environment and protection requirements, and the engineering team will assess feasibility.