Any surface above 120°F is not safe and to leave any such surface exposed to a user’s touch would be irresponsible engineering.I think we can not emphasize this enough, we as engineers are absolutely responsible for the safe operation of our designs. I can attrst that after 30 minutes’ talking, the case would get very warm but not too hot to hold.120 F is the “safe” max temperature for human contact established by several regulating agencies around the world (UL, ISO, etc..) Many years ago.. just out of school.. a electrician told me that “10 finger seconds was roughly equal to 140-145 F … the max safe operating temp of most industrial electric motor installations. One cellular customer (huge, not a 5-letter name though) asked him once to run his calculations for a product going in their new cell phone, and asked that Tjc would be calculated for a case temperature of 45 degrees C. He said ‘No, 45 C is too hot for your customers to hold a cell phone. The water is too hot to touch without injury.Poach - 160 to 180°F. 140 F is typically the min temperature required for cleaning a water based solder flux.120 F plus.. (air temp in the shade) in many places in the southwest US.. is not uncommon. {* signInEmailAddress *} We didn't recognize that password reset code. 120 F is the “safe” max temperature for human contact established by several regulating agencies around the world (UL, ISO, etc..) Many years ago.. just out of school.. a electrician told me that “10 finger seconds was roughly equal to 140-145 F … the max safe operating temp of most industrial electric motor installations.


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Also, liquids can soak clothing making things even worse. SiliconExpert provides engineers with the data and insight they need to remove risk from the supply chain.

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The common causes of hot skin include:Some examples of specific conditions that may cause your skin to feel hot to the touch can include, but aren’t limited to:How you treat skin that feels hot to the touch will depend on what’s causing the condition. The trusted news source for power-conscious design engineers
Transim powers many of the tools engineers use every day on manufacturers' websites and can develop solutions for any company. Was there any mention of medical attention being needed afterwards?This one is out of date but it’s free for the moment. Below, we’ll explore some treatment options for some of the common causes of hot skin.If a fever is present, it may be treated with fluids, In addition to OTC anti-inflammatories and fluids, additional medications may be needed to treat the underlying cause of a fever. How about 35 C?”. {* backButton *} formats like Eagle, Altium, and OrCAD. The water is touchable but not hot.Hot Water - 130 to 135°F. {* currentPassword *} Our website services, content, and products are for informational purposes only. Some time ago, I underwent foot surgery.

As a further note, some years later I bought one of those phones for my spouse.

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