1. Reverse Leakage Current (Ir @ Vr): SK34SMA-3G-AQ: 50 µA @ 40V CDBA340-HF: 500 µA @ 40V The reverse leakage current of the CDBA340-HF is ten times higher. At elevated temperatures (near 150°C junction temperature) and under high reverse voltage, leakage current increases exponentially, leading to higher static power dissipation, additional temperature rise, and potential impacts on overall system efficiency and high-temperature reliability. The SK34SMA-3G-AQ offers superior high‑temperature performance. 2. Junction Capacitance (Cj) Data: SK34SMA-3G-AQ: Not provided CDBA340-HF: 250pF @ 4V, 1MHz The CDBA340-HF provides well‑defined capacitance characteristics, which are critical in high‑frequency switching applications such as secondary‑side rectification in switching power supplies. Junction capacitance affects switching speed, reverse‑recovery losses, and EMI performance. Since the SK34SMA-3G-AQ does not specify this parameter, actual measurement or consultation of the manufacturer’s datasheet is necessary to confirm suitability for high‑frequency circuits. 3. Manufacturer & Quality/Reliability: Diotec (SK34SMA-3G-AQ) is a long‑established European supplier specializing in diodes, with a strong reputation and comprehensive documentation for high‑reliability applications such as automotive and industrial. Comchip (CDBA340-HF) is an Asian manufacturer typically offering cost advantages. However, when designing for critical or long‑lifecycle applications, engineers should pay closer attention to long‑term reliability data, batch‑to‑batch consistency, and quality‑system certifications.