No. Operation above the maximum ratings will most likely result in breakdown or, at the very least, deterioration (i.e. hFE drop). Please refer to the SOA (Safe Operating Area) for single pulse operation. For, continuous pulse situations, calculation of the power and die temperature are required. Please refer to ROHM’s website for more information (e.g. derating curves).
Yes. ‘1.5V drive’ signifies that the MOSFET requires a minimum of 1.5V at the Gate-Source, making it compatible with 1.8V and 2.5V drive. However, we recommend the use of 4V drive MOSFETs when the max. rated voltage between the Gate-Source is over ±10V.
In order to determine the suitability of a transistor is to look at its particular SOA (Safe Operating Area). Ex: In the SOA graph below when VDS is 20Vand IDpeak 2A, making it suitable as long as Pw=100µs or less.
Yes. Pc (Collector power dissipation) must be derated based on the ambient temperature Ta.
Derating must be performed based on the SOA as well. Also, please note that the input voltage (VBE for bipolar and VI(on)/VI(off) for digital) and gain (hFE and G) are affected by the ambient temperature, making it important to verify the electrical characteristics vs. temperature curves (for MOSFETs as well).
In short, no. Transistors and diodes are considered 'articles', or manufactured items formed to a specific shape or design during manufacture which do not release or result in exposure to hazardous chemicals under normal conditions. As such they are exempted from requiring MSDS.
Although we have been using molded resins containing brominated flame retardants that comply with the RoHS Directive, in order to further reduce environmental impact we will continue to adopt halogen-free resin. ROHM defines halogen-free as (in homogeneous material): 1) Chlorine 900ppm or less 2) Bromine 900ppm or less 3) Total concentrations of chlorine and bromine 1500ppms or less 4) Antimony trioxide 1000ppms or less These specifications comply with the requirements of IEC61249 and are intended to satisfy the stringent environmental management demands of European manufacturers.
UL is a safety standard that does not cover semiconductor products such as transistors and diodes. However, for the molded resin where flame retardance is required, materials certified for flame retardance grade UL94V-0 is used.
The basic guaranteed characteristics and specifications as well as materials are no different between standard products designed for consumer applications and automotive-grade products. However, special management is included in the production process to implement classification. In addition, traceability for automotive-grade products is provided for up to 15 years, and special individual requests are supported as much as possible.