Electronics The NTE5024SM is a 300mW, 15V, SMD, single diode, 50nA Zener diode that is manufactured by NTE Electronics. It is packaged in a SOT23, reel, tape form and can withstand temperatures up to +200°C. It is a common Zener diode used in various consumer, industrial, and automotive applications. It is designed to protect and stabilize circuits by regulating voltage across them or clamping excessive voltages. It is also useful in reverse current, voltage waveform shaping, or other voltage-regulated circuits.