SMBJ43A is a unidirectional transient voltage suppressor diode designed for surge and ESD protection in compact surface-mount applications. This device features a working peak reverse voltage (V_RWM) of 43 V, with a breakdown voltage range of 47.8 V to 52.8 V, and is housed in the DO-214AA (SMB) surface-mount package. The diode exhibits fast response times of less than 1.0 picosecond and can dissipate up to 600 watts of peak power, with a maximum clamping voltage of 72.4 V at 10 A. The SMBJ43A is RoHS compliant and conforms to JEDEC standards, making it suitable for protecting sensitive electronics in portable communications, computing, and video equipment against transient overvoltage events per IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and IEC 61000-4-5 (Surge) standards.