Handling “Hot” Electronics Requires Gloves

I have had a number of equipment installers contact me this summer and express concerns about the temperature of the outdoor electronics that they are handling. In some cases, the electronics is too hot to hold. In every case, the temperatures of the products has been within specifications. I tell installers that a circuit card can be as hot as 95  °C and the components on it can be even hotter. Figure 1 illustrates the conditions that we design for. Note that the telecommunications industry often designs to Telcordia specifications, which are the basis for the temperature numbers that we use.

Figure 1: Telecommunications Outdoor Electronics Temperature Stackup.

Figure 2 shows how hot something like this feels on human skin by showing burn time versus temperature (Source: “The Burn Wound”, Chapter 1, Barret and Dziewulski).

Figure 2:Skin surface temperature needed to produce full thickness damage versus time.

So touching something that is at a temperature of 95 °C will cause a burn very quickly. Personally, I always wear gloves.