IP67 vs IP68 Connectors: Which Automotive Sealing Rating Do You Need?
Automotive connectors are frequently spec'd as IP67 or IP68, and the two ratings are often used almost interchangeably in casual conversation -- but they are not the same test, and picking the wrong one can mean over-engineering (and overpaying) or under-protecting a connection that later fails in the field.
What IP67 and IP68 Actually Test
Both ratings share the same 6 for dust ingress (fully dust-tight). The difference is water: IP67 requires the connector to survive temporary immersion up to 1 meter for 30 minutes; IP68 requires continuous immersion at a depth and duration the manufacturer specifies, usually deeper and/or longer than the IP67 test. IP68 is not a fixed, universal depth standard -- always check the manufacturer's stated test conditions.
When IP67 Is Enough
IP67 is the common baseline for exterior automotive connectors that face rain, splashing, and occasional submersion (e.g. driving through a flooded street) but are not designed to be permanently underwater. Most exterior lighting, sensor, and body-control connectors fall into this category.
When You Need IP68
IP68 matters for connectors mounted where they can sit in standing water for extended periods, or that must survive high-pressure washing (which drives water further than a simple splash test predicts). Battery pack connectors, underbody connectors, and some off-highway/commercial vehicle applications often specify IP68 for this reason.
Match the rating to the real-world exposure, not the highest number available -- IP68 costs more and does not automatically make a connector more reliable if the mechanical seal design and mounting location do not actually require it.
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For detailed datasheets or cross-reference comparisons for this series, please contact our technical team.