1.5SMC440A

The 1.5SMC440A is a unidirectional TVS diode from Littelfuse designed to protect sensitive electronic equipment from voltage transients induced by lightning and other transient events. It features a reverse standoff voltage of 376V, a nominal breakdown voltage of 440V, and a clamping voltage of 602V at a peak pulse current of 2.5A (10/1000μs waveform). The device can handle 1500W of peak pulse power under the same waveform conditions.

This Zener-based TVS diode offers a fast response time of less than 1.0ps from 0V to breakdown voltage, ensuring rapid clamping of overvoltage events. It provides ESD protection up to 30kV air and contact discharge per IEC 61000-4-2. The diode is housed in a surface mount DO-214AB (SMC) package with a low profile and built-in strain relief, suitable for automated assembly.

The 1.5SMC440A operates over a junction temperature range of -55°C to 150°C and has typical thermal resistance of 15°C/W junction-to-lead and 75°C/W junction-to-ambient. It is RoHS compliant, halogen free, and meets MSL level 1 moisture sensitivity. The part is ideal for protecting I/O interfaces and other data lines in industrial, telecom, and consumer applications.