The 1.5SMC39A is a unidirectional transient voltage suppressor diode designed for surge and ESD protection in portable communications, computing, and video equipment. It features a breakdown voltage range of 37.1 to 41 V with a peak pulse power rating of 1500 watts and a peak forward surge current of 200 amps. The device is housed in a compact DO-214AB (SMC) surface mount package and operates over a temperature range of -55°C to +150°C, with a typical temperature coefficient of 0.1% per °C. The 1.5SMC39A is RoHS compliant and halogen-free, making it suitable for applications requiring IEC 61000-4-2 ESD protection (Level 4), IEC 61000-4-4 EFT, and IEC 61000-4-5 surge protection, with fast response times of less than 1.0 picosecond.