1SMB5947BT3

The 1SMB5947BT3 is a 3W surface mount Zener voltage regulator diode from On Semiconductor's 1SMB59xxBT3 series. It provides a nominal Zener voltage of 82V with ±5% tolerance. The device is designed for voltage regulation and protection applications requiring high power dissipation in a compact SMB package. Key electrical characteristics include a maximum forward voltage of 1.5V at 200mA, reverse leakage current of 1µA at 62.2V, and a maximum Zener impedance of 160Ω. The diode can dissipate up to 3W at a lead temperature of 75°C (derated 40mW/°C above 75°C) and 550mW at 25°C ambient on a standard FR-4 board. It operates over a temperature range of -65°C to 150°C. The device is housed in a void-free, transfer-molded plastic DO-214AA (SMB) package with L-bend leads for surface mounting. It is supplied in tape and reel packaging with 2500 units per reel. The diode is rated for ESD protection (Class 3 >16kV HBM) and has a flammability rating of UL 94 V-0. The cathode is indicated by a polarity band. This Zener diode is suitable for voltage clamping, overvoltage protection, and reference voltage generation in various electronic circuits.