Short for Moisture Sensitivity Level, MSL is a JEDEC (Joint Electron Device Engineering Council) standard established for the purpose of preventing device failure due to volumetric expansion of atmospheric moisture introduced into the resin package of semiconductor devices during reflow. The floor life of IC packages, during which the components must be mounted and reflowed after opening the moisture-resistant packaging, is broken down into 8 MSL levels.
‘Isolated’ refers to a circuit separated from the AC line in order to prevent electric shock. A ‘non-isolated’ circuit is one not shielded from the AC power source, making electrocution possible. Applications requiring isolation circuitry include TVs and A/V sets. ROHM offers a lineup of power modules (i.e. BP5710-1, BP5716, BP5729) optimized for isolated equipment. A number of consumer devics – mainly appliances – typically are not isolated, ranging from washing machines and hot pots to rice cookers and air cleaners.
Not likely, since the surface temperature of the BP5034D12 will be 86ºC at a load current of 0.1A. However, the peripheral (circuit) conditions have a large effect on whether a component fails or not. Therefore, the characteristics should be evaluated under actual operating conditions.
No ROHM power supplies are UL-rated. However, the board and resin mold used in the power supplies are UL certified, and all power modules should pass UL testing if submitted by the customer. (Customers who have obtained UL certification using ROHM products exist)