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Safe Handling of AC/DC Power Adapters — Desktop & Wall-Mount, Part 4: "Do Not Drop"
What happens if you drop precision equipment like AC/DC Power Adapters — Desktop & Wall-Mount? We introduce safe handling methods for AC/DC Power Adapters — Desktop & Wall-Mount. In the fourth installment, we focus on the theme "Do not drop."
AC/DC Power Adapters — Desktop & Wall-Mount “Do Not Drop!” Series Vol. 4
Among the investigations requested by our customers, there have been cases where it was suspected that a malfunction occurred due to the product being dropped during use.
Our AC/DC Power Adapters — Desktop & Wall-Mount comply with IEC60950-4.2.6 regarding mechanical strength against drops, unless specified otherwise by the customer.
The outline of our drop test based on IEC60950-4.2.6 is as follows:
- Height: 75 cm for desktop equipment (INLET), 100 cm for direct plug-in (PLUG)
- Floor: Three layers of plywood with a total thickness of 51–53 mm fixed to the floor
- Pass criteria: Case remains closed after the drop, withstand voltage test passes, output is normal, no PCB pattern peeling, cracks, etc.
In the past, there was a series of malfunctions suspected to have been caused by impact from drops involving the same product used by the same customer. Upon rechecking the customer’s usage environment, we found that our AC/DC Power Adapters — Desktop & Wall-Mount were being frequently set up (installed and removed) for equipment used in schools... That explained a lot.
Nowadays, most classroom floors are covered with P-tiles (vinyl chloride flooring), which are harder than the plywood used in standard drop tests. If the product repeatedly slips from children's hands under such conditions, the drop height could easily exceed 100 cm, indicating the possibility of drops under much harsher conditions than those required by standards.
Saying, “The product is used under stricter conditions than the drop test standard, so it's not surprising if it fails…” wouldn’t be acceptable!! So, we reinforced the parts that frequently failed, which significantly reduced the occurrence of similar issues.
The pass/fail result in a drop test evaluates only the damage at the time of testing, but in actual use, the product may be subjected to more stress than the standard’s conditions or number of repetitions. Therefore, before using our AC/DC Power Adapters — Desktop & Wall-Mount, we recommend that customers evaluate the products in their actual usage environment, including electrical performance.
More importantly, it goes without saying that careful handling to avoid dropping the AC/DC Power Adapters — Desktop & Wall-Mount is crucial…