The UMSB40M with Bridge Rectifiers UMSB RoHS is a general purpose bridge rectifier manufactured by Jingdao. It is designed to provide efficient operation and a wide range of current ratings. The UMSB40M is housed in a six-pin SIP (Single In-line Package) package with a metal base plate to enhance heat dissipation. It has a voltage rating of AC400V, an IFRM rating of 40A, and a surge overload rating of 400A. The UMSB40M is UL and RoHS certified for environmental safety, and its Maximum Rated Temperature (Tm) is 85°C. It is an ideal choice for use in power supply, transformer, and motor control applications.